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Pokhriyal, T. C.

• Introduction of Nitrogen Fixing Medicinal Plants: a Suitable Alternative for the Conservation of Exposed Sites in the Garhwal Himalayan Ecosystem

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Authors

A. K. Parandial , Pankaj Kumar , H. B. Naithani , T. C. Pokhriyal

Source

Indian Forester, Vol 131, No 3 (2005), Pagination: 449-462

Abstract

The Garhwal Himalayas are one of the richest floristic zones for the medicinal plants of Indian subcontinent. It provides matchless wealth of more than 300 rare and endangered species of medicinal plants having therapeutic properties. The over exploitation of these precious material from himalayan forest ecosytstem over last few decades have not only pushed these towards extinction but also enhanced the problem of soil erosion, land degradation and loss of biodiversity in the area. Introduction of nitrogen fixing plants may provide an important tool for the ecorestoration attempts in this area. Advocating nitrogen fixing plants having medicinal uses may provide wider acceptability among the local populace from economic as well as soil conservation point of view. The adoptability of indigenous species may be useful for planting and rejuvenating the degraded sites in different altitudinal zones of the Himalayan ecosystem. In the present article an attempt has been made to enumerate the existing nitrogen fixing species of medicinal values at various altitude for the conservation of degraded sites in Garhwal Himalayas.

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• Effects of Nitrogen and Rhizobium Inoculation Treatments on some Growth Parameters in Albizia lebbek (L). Benth Seedlings

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Authors

Y. S. Chauhan , T. C. Pokhriyal

Source

Indian Forester, Vol 128, No 3 (2002), Pagination: 316-322

Abstract

In this study, Albizia lebbek seedlings were treated with and without inorganic nitrogen and inoculated with Rhizobium. It was observed that the plants treated with both nitrogen and Rhizobium performed better than those, which received either one of them or none (control). Growth parameters i.e., plant height, collar diameter and ischolar_main length were observed to follow an increasing pattern with growth irrespective of the nature of treatment. New leaf flushes appeared from April onwards reaching maximum in the month of August and September, followed a decreasing trend thereafter.

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• Distribution of Leguminous and Non-leguminous Nitrogen Fixing Plants in Relation to Altitudinal Variations in Eastern Part of Nepal

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Authors

Himmat Singh , K. C. , T. C. Pokhriyal

Source

Indian Forester, Vol 124, No 7 (1998), Pagination: 544-555

Abstract

A chronological survey was conducted to study the identification and distribution of some nodulating and non-nodulating leguminous and actinorrhizal herb, shrub, climber and tree species in Eastern part of Nepal from Tarai (60 m) to timber-line (above 3000 m). Amongst 186 species and 79 genus explored in this study, 172 and 14 species, 70 and 9 genera were recorded in leguminous and aetinorrhizal groups. Total 144 and 7 species, 59 and 5 nodulating genera were recorded in leguminous and non-leguminous species. In the three sub-families ofLeguminoseae, Papilionoideae was recorded to offer highest number of nodulating species and Caesalpinioideae non-nodulating. However, maximum numbers of nodulating herbs, shrubs, and climbers were recorded in Papilionoideae and trees in Mimosoideae. The distribution of nodulating leguminous species were observed to be dominated in the tropical and sub-tropical areas with a sharp decline from 1800 m onwards. The maximum 92 species were observed to be occurred between 0-600 m altitudinal range, followed by 84 species between 600-1200 m, 80 species between 1200-1800 m, 48 species between 1800-2400 m, 17 species between 2400-3000 m and the minimum 5 species in and above 3000 m. These nodulating species distributed in different altitudinal ranges can be further screened for the various afforestation and soil-improvement programmes in the region.

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• Nitrogenase Activity Vis-a-vis Field Testing of Dalbergia sissoo Rhizobium Isolates Collected from Different Sources

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Authors

P. C. Pandey , S. P. Chaukiyal , T. C. Pokhriyal

Source

Indian Forester, Vol 125, No 2 (1999), Pagination: 219-224

Abstract

Dalbergia sissoo Rhizobium isolates were collected from different sources viz., Asharori, Lachhiwala, Allahabad, Maldevta, Ramnagar, Chichrauli, F.R.I. Dehra Dun and pure culture from Microbiology Laboratory, Chandigarh to study their nitrogen fixation behaviour. Maximum in-situ nitrogenase activity was recorded in Asharori culture and minimum in Chichrauli. Six cultures were inoculated to Dalbergia sissoo seedlings, to study their symbiotic performances under potculture conditions. Maximum nodule number, its fresh and dry weight per plant and plant height was recorded in Asharori inoculated culture. Whereas, maximum nitrogenase (g^-1h¹ and pl^-1h^-1) activity was recorded in Maldevta and Microbiological Laboratory, Chandigarh cultures respectively inoculated to Dalbergia sissoo seedlings. No relationship was observed between in-situ and symbiotically associated Rhizobium strains in nitrogen fixation activity.

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• Nodule Biomass and Nitrogen Fixation Studies in some Leguminous Nitrogen Fixing Plants

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Authors

T. C. Pokhriyal , S. P. Chaukiyal , H. B. Naithani

Source

Indian Forester, Vol 123, No 12 (1997), Pagination: 1197-1198

Abstract

No abstract

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• Nitrogen Fixation and Nodulation Behaviour in Relation to Seasonal Changes in Six Multipurpose Tree Species

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Authors

T. C. Pokhriyal , S. P. Chaukiyal , K. C. Himmat Singh

Source

Indian Forester, Vol 122, No 8 (1996), Pagination: 718-726

Abstract

Six multipurpose, nitrogen fixing tree species viz., Acacia nilotica. An evergreen, dry zone and Robinia pseudo-acacia, deciduous. Temperate, both spiny medium sized tree species. Albizia lebbek, Dalbergia sisoo fairly large and Ougeinia oojeinensis middle sized deciduous tree of sub-tropical climate upto 1200 m. sub-Himalayan tract and Pongamia pinnata, evergreen, medium sized. Tree widely distributed throughout the country. These species have been used for the various afforestation programmes in the country. The seedlings of these species were raised in Plant Physiology Branch, Botany Division,Forest Research Institute, Dehra Dun, to study the seasonal variation effects on nodulation behaviour and nitrogenase (acetylene-ethylene reduction) activity. In three species viz., Acacia, Ougeinia, Robinia, maximum nitrogenase activity was observed during summer season, whereas, in other three species i.e. Albizia, Dalbergia, Pongamia during rainy season. However, lowest activity in most of the species was recorded during winter season. Maximum nodule number per plant was reported during rainy season except Robinia in summer. An identical trend in nodule growth and nitrogen fixation activity was recorded in Dalbergia and Ougeinia seedlings. Whereas, Acacia, Albuizia and Pongamia have followed almost similar trend among themselves for nodule number and nodule biomass. This study concludes that the nodulation and nitrogen fixation behaviour differs within and between species and seasons.

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• Natural Regeneration of Eucalyptus camaldulensis : a New Report

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Authors

S. Nautiyal , T. C. Pokhriyal , C. J. S. K. Emmanuel

Source

Indian Forester, Vol 120, No 2 (1994), Pagination: 174-175

Abstract

No abstract

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• Nitrogen Fixation by some Ectomycorrhizal Fungi and Mycorrhizal Systems

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Authors

H. S. Thapar , T. C. Pokhriyal

Source

Indian Forester, Vol 119, No 2 (1993), Pagination: 143-146

Abstract

Nitrogenase-activity of six species of ectomycorrhizal fullgi I e. Pisolilhus tinclorius. Laccaria laccata, Cenococcum geophilum Syn Cenococclum graniforme Rhizopogon luteolus, Thelephora terrestris and Suillus brevipes in pure culture was assayed using Acetylene-Ethylene reduction technique in laboratory studies. All the six species showed a positive but variable response. Maximum activity was observed in Laccaria laccata followed by Suillus brevipes. The activity was minimal in case of Thelephora terrestris and Pisolithus tincforius. Mycorrhizal systems of Pinus patula showed 2-3 times higher nitrogenase activity as compan d to P. caribaea.

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• Nitrogen Fixation and Nodulation Behaviour of some Nitrogen Fixing Species from Inner and Outer Himalaya

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Authors

T. C. Pokhriyal , S. P. Chaukiyal , H. B. Naithani

Source

Indian Forester, Vol 119, No 4 (1993), Pagination: 310-320

Abstract

The chances of nitrogenous fertilizer use in various afforestation programmes are very bleak in the near future. The only alternative is to select such species which can meet their nitrogen requirements from soil as well as atmosphere. An attempt has been made in the present study to identify some of the nitrogen fixing herb, shrub and tree species from inner and outer Himalaya region, so that these species can be recommended for the afforestation programmes to a particular area. Out of ninety five species recorded, most of them belong to family leguminosae except Alnus nepalensis and Myrica esculenta non-leguminous.

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• An Empirical Study of Moisture Content Behaviour in Acacia and Eucalyptus Plants

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Authors

Rajesh Kumar , S. K. Sheel , T. C. Pokhriyal

Source

Indian Forester, Vol 119, No 6 (1993), Pagination: 446-450

Abstract

The moisture content in green plants is a highly variable character over the seasons. The seasonality of moisture content can be studied applying the technique of time-series analysis. In the present study an attempt has been made to analyse the moisture content behaviour statistically in different plant parts of Acacia and Eucalyplus grown under potculture conditions.

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• Effect of Nitrogen Fertilizers on the Nitrogenase Activity and Rhizosphere Microflora in Enterolobium timbouva Mart

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Authors

J. S. Sehgal , V. Shanker , H. S. Sehgal , T. C. Pokhriyal

Source

Indian Forester, Vol 118, No 3 (1992), Pagination: 218-226

Abstract

Enterolohium timbouva Mart. Seedlings raised under pot culture conditions were given different nitrogen treatments viz. 20, 40, 60, 80, and 100 kg per ha in three equal splits at fifteen days interval after 50 days of sowing. Two controls without N aplication one with sterile (NO-1) and another with normal (NO-2) soils were also maintained simultaneously. Periodical samplings for nodule growth, nitrogenase (Acetylene reduction) activity and rhizospbere microflora was taken after every fifteen days interval after the application of the last nitrogen dose i.e. 85, 100, l15, 130 and 145 days after sowing. Among different N treatments, maximum and minimum nodule fresh and dry weights and nitrogenase activity was observed at N-40 and N-1OO respectively as compared to control in all the five growth stages. However. An increase in the rhizospbere microftora (bacteria and fungi) was observed with the increase in the nitrogen doses.

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• Valley of Flowers: Need for Conservation or Preservation

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Authors

H. B. Naithani , J. D. S. Negi , R. C. Thapliyal , T. C. Pokhriyal

Source

Indian Forester, Vol 118, No 5 (1992), Pagination: 371-378

Abstract

The vegetation of the Bhyunder Valley in the Nanda Devi National Park, situated in the Garhwal Himalaya, is unique and abounding in biological diversity. Proper cataloguing of species diversity is important from the point of view of evolving strategies for the conservation of rare and endangered species. Earlier attempts at listing of species suffer from some glaring omissions which have been highlighted in this paper. A wide variety of herbs which presented a marvel of nature's landscaping when in flowering during the period of summer rains and which attracted trackers from all over the world have dwindled considerably in racent years. The authors trace this to the banning of grazing in the valley which has led to overdominance of some faster growing, and taller species resulting in the suppression of a number of less aggressive species. An attempt has been made to underline some factors which might have been responsible for decline in floral diversity.

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• Identification of some Nitrogen Fixing Herb and Shrub Species from Dehra Dun-Mussoorie Region

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Authors

T. C. Pokhriyal , S. P. Chaukiyal , H. B. Naithani , B. B. Gupta

Source

Indian Forester, Vol 118, No 9 (1992), Pagination: 681-683

Abstract

No abstract

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• Effect of Nitrogen Treatments on in Vivo Nitrate Reductase Activity in Entrolobium timbouva

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Authors

T. C. Pokhriyal , S. P. Chaukiyal , D. S. Negi , B. B. Gupta

Source

Indian Forester, Vol 117, No 1 (1991), Pagination: 72-75

Abstract

No abstract

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• Green Belts Vis-a-vis Environmental Pollution

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Authors

T. C. Pokhriyal , S. Nautiyal

Source

Indian Forester, Vol 117, No 6 (1991), Pagination: 468-475

Abstract

The paper deals with the effective role of green belts in mitigating the pollution problems of urban environment. Useful tree species for developing green belts at different climatic zones have been suggested. The multiple role of these plantations located in the neighbourhood of industrial complexes is emphasized.

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• Identification of some Fast Growing Leguminous Tree Species for Nitrogen Fixation Studies

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Authors

T. C. Pokhriyal , H. C. S. Bhandari , D. S. Negi , S. P. Chaukiyal , B. B. Gupta

Source

Indian Forester, Vol 116, No 6 (1990), Pagination: 504-507

Abstract

Studies were carried out to screen twenty seven different leguminous, fast growing tree species for nodule formation and nitrogen fixation activity. The nodules add nitrogenase (acetylene reduction) activity was present in all the twelve mimosoid, four Papilionoids species and absent in all the eleven Caesalpinioid species examined under pot culture conditions.

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• Sibbaldia and Potentilla - a New Nodulating Genus of Rosaceae

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Authors

T. C. Pokhriyal , S. P. Chaukiyal , H. B. Naithani

Source

Indian Forester, Vol 116, No 10 (1990), Pagination: 837-838

Abstract

No abstract

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• Leaf Emergence and Shedding Behaviour of Populus deltoides

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Authors

T. C. Pokhriyal , S. P. Pant , S. R. Joshi

Source

Indian Forester, Vol 115, No 1 (1989), Pagination: 48-51

Abstract

No abstract

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• Techniques and Approaches to Utilize Nitrogen Fixing Systems in Forestry Plantation Programmes

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Authors

T. C. Pokhriyal , G. P. Mathani

Source

Indian Forester, Vol 115, No 3 (1989), Pagination: 136-158

Abstract

The exploitation of biological nitrogen fixation presently demands an increased use of Nitrogen fixing tree specing and other symbiotic systems in silvicultural practices in context to meet the stupendous targets of afforestation of wastelands and fuel wood production. In tbe present article an attempt has been made to discuss tbe usefulness of the techniques and approaches to utilize nitrogen fixing systems in forestry plantation programmes.

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• Standardization of In-vivo Nitrate Reductase Activity in Albizia lebbeck, Acacia nilotica and Dalbergia sissoo

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Authors

T. C. Pokhriyal , A. S. Raturi , H. O. Nautiyal , S. R. Joshi

Source

Indian Forester, Vol 114, No 3 (1988), Pagination: 166-167

Abstract

No abstract

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• Effect of Seasonal Variation on Nitrate Contents In Natural Sal Forest (Shorea robusta)

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Authors

T. C. Pokhriyal , B. C. Ramola , M. S. Bisht , H. O. Nautiyal , K. P. Unnikrishnan

Source

Indian Forester, Vol 114, No 11 (1988), Pagination: 784-789

Abstract

Nitrate contents in the leaf, litter and soil upto 60 cm depth were investigated in the natural sal (Shorea robusta) forest, Jhajra, DehraDun. Significantly more soil nitrate was observed in the upper depths (0-30 cm) as compared to 30-60 cm depth. The nitrate contents in the top and middle portion of canopy were significantly higher as compared to the nitrate content in the bottom portion. The nitrate content in the leaves have also responded to the seasonal variations. Though there was no significant correlations observed among the variables when data was pooled for the whole year, significant correlations were available within the seasons.

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• Soil Moisture Regime and Nitrogen Content in Natural Sal Forest (Shorea robusta)

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Authors

T. C. Pokhriyal , B. C. Ramola , A. S. Raturi

Source

Indian Forester, Vol 113, No 4 (1987), Pagination: 300-306

Abstract

In the present study, seasonal changes in the moisture and N contents of the leaf, litter and soil upto 60 cm depth were carried out in the natural sal (Shorea robusta) forest, Jhajra, Dehra Dun. A significantly higher soil moisture contents were observed during the rainy seasons (July, Aug., Sept.) and lowest in the months of June. The maximum litter fall was observed in the months of April, March followed by May. The remaining months have poor litter fall and they do not differ among themselves signlficantly. The upper part of crown have significantly higher N contents as compared to middle and bottom. No slgnificant changes in the soil N was observed upto 60 cm depth. A negative correlation was observed between soil moisture and litter production rate and green leaf N and litter N. Whereas a positive correlation was noticed between soil N and litter production, this relationship was more pronounced during summer months.

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• Nitrogen Fixation in Albizia, Acacia, Dalbergia and Leucaena leucocephala

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Authors

T. C. Pokhriyal , A. S. Raturi , S. P. Pant , S. K. Pande , S. K. Bhatnagar

Source

Indian Forester, Vol 113, No 5 (1987), Pagination: 366-369

Abstract

Nitrogen fixation studies were carried out in four tree species viz., Albizia lebbeck, Acacia nilotica, Dalbergia sisoo and Leucaena leucocephala under potculture conditions. Maximum plant height, nodule biomass, and nitrogenase (acetylene-ethylene reduction) activity was noticed in case of Leucaena followed by Albizia, Acacia and Dalbergia. The amount of n moles C₂ H₂, produced per plant h^-1 and per nodule h^-1 was 550.9 and 4.44 in Albizia, 488.88 and 4.40 in Acaica, 125 and 2.28 in Dalbergia and 1772.3 and 12.31 in Leucaena.

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• Role of Forests in Mitigating Air Pollution

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Authors

T. C. Pokhriyal , B. K. Subba Rao

Source

Indian Forester, Vol 112, No 7 (1986), Pagination: 573-582

Abstract

The role of forest in soil and water conservation is well recognised. This paper examines the role of forests from a new point of view viz. in mitigating air pollution. A list oC pollution tolerant free specics has also been given.

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• Nitrate Assimilation in Leucaena leucocephala Leaves

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Authors

T. C. Pokhriyal , A. S. Raturi

Source

Indian Forester, Vol 112, No 11 (1986), Pagination: 993-966

Abstract

The in vivo Nitrate Reductase activity was standardized for the leaflets of Leucaena leucocephala. The maximum enzyme activity was observed at 7.6 pH (0.05M) and 0.15 M Potassium nitrate concentration. During the study, maximum NR activity (mµ moles NO₃^- reduced g^-1 dry wt. h^-1) and total NR activity per leaf blade were estimated. In the upper leaf blades followed by a decrease in the subsequent leaf blades in the descending order. Fresh and dry weight values also followed almost the similar trend.

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• A Study of Nitrate Reductase Activity in the Populus deltoides Leaves

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Authors

T. C. Pokhriyal , A. S. Raturi

Source

Indian Forester, Vol 111, No 2 (1985), Pagination: 82-89

Abstract

The method for assay of in vivo nitrate reductase(NR) activity was standardised for poplar leaves. The maximium activity(mμ moles NO^-₃ reduced g fr, wt^-1h^-1)was obtained with a 0.05 m phosphate buffer of 7.6 pH and 0.05 m potassium nitrate concentration. Maximum NR activity and total activity(leaf)^-1 was observed in the sixth leaf from the tip and further it decreased with the increase in age. An increase in the fresh and dry weights of leaves was observed upto eighth leaf. The middle order leaves seem to be more efficient in the rate of photosynthesis to gain higher fresh and dry weights and NR activity as compared to young and old ones.

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• A Note on Proline Content in Eucalyptus Hybrid Leaves

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Authors

T. C. Pokhriyal , A. S. Raturi

Source

Indian Forester, Vol 111, No 12 (1985), Pagination: 1070-1075

Abstract

Accumulation of proline , a free amino acid is a common feature in some of the stress affected crop plants. An attemp was made to study the changes in the proline contents of diffferent leaflets of Eucalyptus hybrid. Maximum (608.77 μg/g dry wt.) and minimum (24.81 μg/g fr.wt.) proline cantents was estimated in the first and tenth leaf blades respectively. But the total proline per leaf blade was highest in the fourth and lowest in the first leaf blade.

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• Effect of Rhizobial Inoculation on Nitrogen Fixation in Albizia lebbek and Dalbergia sissoo

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Authors

Ajeet Kaur ¹, S. P. Chaukiyal ¹, P. C. Pandey ¹, T. C. Pokhriyal ¹

Affiliations
1 Forest Research Institute, Dehradun, IN

Source

Indian Forester, Vol 141, No 8 (2015), Pagination: 843-847

Abstract

Rhizobia were isolated from active nodules of Albizia lebbek and Dalbergia sissoo from different sources and confirmed against nodulation test. Several other physiological and biochemical tests were also performed. They were then multiplied in Yeast Extract Mannitol (YEM) broth and inoculated into their respective A. lebbek and D. sissoo seedlings. These were maintained under pot culture conditions in the glass house for few months to study the effect of inoculation treatments on nodulation, nitrogen fixation and biomass production. It was found that A. lebbek seedlings inoculated with rhizobial isolates of Lalpani gave the highest nodular biomass, specific and total nitrogenase activity. In case of D. sissoo, isolate from Asharori resulted in highest nitrogenase activity under pure culture conditions and maximum nodular number, nodular biomass, collar diameter and plant height as compared to other inoculation treatments. No relationship between nitrogenase activities of rhizobial isolates under pure culture and symbiotic conditions was observed. It may be concluded that both the isolates of Lalpani and that of Asharori may be utilized for the forestry programmes of planting A. lebbek and D. sissoo respectively.

Keywords

Albizia lebbek, Dalbergia sissoo, Seedlings, Nitrogenase, Biomass, Nodule, Rhizobium.

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