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Kumar, Rakesh
- Seed Source Variation in Khair (Acacia catechu Willd.)
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Indian Forester, Vol 130, No 5 (2004), Pagination: 530-536Abstract
An attempt was made to study the variation in seed traits among different seed sources of Acacia catechu from Haryana, Punjab, Uttaranchal and Jammu & Kashmir. Further, correlations among various seed traits, germination percentage and growth behaviour of parent trees was also estimated. The correlation matrix revealed that statistically significant correlation exists between seed weight and germination per cent, therefore seed weight can be considered as an important trait for early selection of seed sources. Comparatively, the seed sources i.e. Manjhi-l, Manjhi-2 (Hoshiarpur, Punjab); Pinjour (Haryana) and Rudraprayag (Uttaranchal) performed better in germination study.
- Carbohydrates in Relation to Rooting of Culm Cuttings of Dendrocalamus strictus (Roxb.)
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Indian Forester, Vol 129, No 11 (2003), Pagination: 1355-1360Abstract
Study was conducted to estimate the carbohydrate content in bamboo culm in relation to its ischolar_maining potential. The findings indicate that in Dendrocalamus strictus, the carbohydrate content is not directly related to ischolar_maining potential of cuttings. Hence, some other factors may be responsible for initiating the ischolar_maining in culm cuttings.- Foliage Water Loss Pattern in Sal (Shorea robusta Gaertn.f.) and Its Associates under Stress
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Indian Forester, Vol 128, No 6 (2002), Pagination: 655-659Abstract
An attempt has been made to understand the foliage water loss pattern in Sal forest in Barkot Forest Range of Dehra Dun Forest Division. The study reveals that heavy canopy opening resulted in increase in atmospheric temperature, which is causing stressful environment for the community. Under this stressful environment Mallotus philippensis appears to be drought tolerant species, which can cope with the adverse environment conditions to some extent. This has the conformity that in the Sal forest, where the moisture has become the limiting factor, Mallotus philippensis is the only species, which is colonising during the phase of retrogressive succession.- Non-linear Regression Models in Bamboo(Dendrocalamus strictus) Seedlings
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Indian Forester, Vol 126, No 2 (2000), Pagination: 154-158Abstract
A study was conducted with non-linear regression model in Bamboo (Dendrocalamus strictus) seedlings to estimate the fresh weight of rhizome on the basis of fresh weight ofleaves. The non-linear analysis reflected that fresh weight of rhizome and leaves are not linearly related. One more important point emerges that only fresh weight of leaves is not responsible for fresh weight of rhizome.- Statistics of Biomass Structure of Dendrocalamus strictus (Roxb.) Nees Seedlings
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Indian Forester, Vol 126, No 9 (2000), Pagination: 993-1001Abstract
Descriptive statistics of different biomass and growth parameters of Dendrocalamus strictus seedlings were reported. The relative contributions of different parts of seedlings to total weight in fresh and dry conditions were also given. It was observed that the contribution of culms was maximum followed by rhizome for both the conditions. An estimate of every parameter is also worked out for different number of culms present in a clump. Similar trend was observed for the seedlings having 3 and 4 number of culms per clump for most of the parameters.- Seed Source Variation in Black Siris (Albizia lebbek Benth.)
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Indian Forester, Vol 132, No 2 (2006), Pagination: 149-155Abstract
Variation with respect to different pod and seed characteristics among 20 seed sources from Punjab, Haryana and Uttaranchal was studied. Correlation coefficient among pod and seed characteristics, germination percentage and growth parameters of mother trees was also estimated. The correlation matrix revealed that statistically significant correlation exists between seed weight, seed width, and seed length. Germination per cent was positively correlated with number of seeds per pod. Highest germination percentage was found in Raipur seed source in Ropar Forest Division though there was a high variation in germination percentage among all the seed sources. Based on our finding it is suggested that the seeds of Albizia lebbek should preferably be collected from healthy and fresh pods.- Effect of Fertilizer Treatment and Harvesting Time on Principal Chemical Constituents of Oroxylum indicum Vent. and Andrographis paniculata Nees
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Indian Forester, Vol 136, No 5 (2010), Pagination: 580-587Abstract
Analysis of two medicinal plants, Andrographis paniculata (Andrographolide) and Oroxylum indicum (mixture of oroxylin A & chrysin) content was carried out under different fertilizer treatments and at different physiological stages of plants. Total ash, water-soluble ash, acid insoluble ash, alcohol soluble extractives and water-soluble extractives for the above plant species were estimated alongwith thin layer chromatography examination. Maximum andrographolide content of 2.0% was found in 120 days old plants and among the treatments given to plants, the chemical fertilizer treatment influenced the Andrographolide, alcohol soluble extractive and water-soluble extractive. In case of Oroxylum indicum, all other evaluated compounds other than oroxylin-A and chrysin content were found to be almost similar whereas oroxylin-A and chrysin content was found maximum in mature tree ischolar_main bark i.e. 0.7%. The results of present study show that fertilizer treatments given to plants and time of harvesting affect the chemical constituents of plants.Keywords
Oroxylum indicum, Andrographis paniculata, Oroxylin-A, Chrysin, Andrographolide- Cross-validation - a Tool for Forest Modellers
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Indian Forester, Vol 125, No 12 (1999), Pagination: 1224-1227Abstract
Cross-validation technique is discussed for the validation purpose of models. Results of apparent error, true error, excess error and other statistics of two volume estimation models of Poplar have reported.- Relationship of Edaphic Factors on the Pathogenicity of Root Rot of Bael Caused by Fusarium solani
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1 Chaudhary Charan Singh Haryana Agricultural University, Regional Research Station, Bawal – 123501 (Rewari), Haryana, IN
1 Chaudhary Charan Singh Haryana Agricultural University, Regional Research Station, Bawal – 123501 (Rewari), Haryana, IN
Source
Indian Forester, Vol 142, No 5 (2016), Pagination: 502-506Abstract
An investigation to study the influence of edaphic factors on the pathogenicity of ischolar_main rot of bael caused by Fusarium solani showed that the seedling mortality increased with the increase in inoculum levels of either of the media i.e. PDB and wheat grains. The maximum mortality (26.25% pre-emergence and 38.50% post-emergence) in case of mycelial mat was observed in soil inoculated with 4 kg soil whereas in case of wheat grain culture, maximum mortality (28.00% pre-emergence and 40.25% post-emergence) was observed in soil inoculated with 40g kg-1 soil. The disease incidence was observed more on young seedlings and there was significant decrease in disease incidence with the increase in seedling age. Mortality of seedlings were maximum (46.25%) when 5 days old seedlings transplanted in wheat grain inoculated soil, whereas 40 days old seedlings showed 22.50 per cent disease incidence. The maximum pre (40.25%) and post (38.50%) emergence seedling mortality was observed when soil was inoculated at 5 cm depth. The highest incidence of seedling mortality (37.25% pre-emergence and 28.25% post-emergence) was recorded in treatments where soil was inoculated 48 hour before sowing of Bael seeds. The seedling mortality increased with the increase in moisture content. The incidence was highest (28.25% pre-emergence and 40.25% post-emergence) when the seedlings were irrigated twice a day and was least (19.00% pre-emergence and 30.00% post-emergence) when irrigation was applied at two days gap.Keywords
Edaphic Factor, Pathogenicity, Root Rot, Bael, Fusarium solani, Seedling.References
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