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Singh, J. P.

A Study on General Allometric Relationships Developed for Biomass Estimation in Regional Scale Taking the Example of Tectona grandis Grown in Bundelkhand Region of India

Abstract Views :240 | PDF Views:88

Authors

D. Deb ¹, A. Ghosh ², J. P. Singh ¹, R. S. Chaurasia ¹

Affiliations
1 Indian Grassland and Fodder Research Institute, Jhansi 284 003, IN
2 Uttar Banga Krishi Viswavidyalaya, Cooch Behar 736 165, IN

Source

Current Science, Vol 110, No 3 (2016), Pagination: 414-419

Abstract

In this communication an effort has been made to develop a general non-site specific allometric relationship taking Tectona grandis grown in semi-arid Bundelkhand region without harvesting any tree. To determine the most appropriate predictor variable for producing the relationship, different physiological parameters of this tree species like diameter at breast height (dbh), basal diameter, tree height, forking height, collar diameter, etc. were collected from the standing trees from MP part of Bundelkhand region, comprising a total of 45 sites of 4 districts namely Guna, Vidisha, Chhatarpur and Tikamgarh. The dataset contained 418 trees with biomass ranging from 12.79 kg/tree to 12707.92 kg/tree, height ranging from 1.5 to 18.5 m and dbh ranging from 0.03 to 0.44 m. For developing the models; dbh, height, dbh × height and dbh² × height were used as predictor variables. All four contrasting sites were taken for developing allometric models and after examining model residuals and site-specific relationships, it was found that using dbh² × height alone as the predictor variable produced the most stable model. Thus it makes regional estimation of aboveground biomass production easier with precision as accurate as site-specific allometry.

Keywords

Allometry, Bundelkhand Region, Normalized Difference Vegetation Index, Residual Diagnostics, Tectona grandis.

Full Text

References

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Ketterings, Q. M., Richard, C., Yakub, A. and Cheryl, A. P., Reducing uncertainty in the use of allometric biomass equations for predicting above-ground tree biomass in mixed secondary forests. For. Ecol. Manage., 2001, 146, 199–209.

Menon, A. R. R. and Thomas, T. P., National carbon project: Spatial assessment of vegetation and soil carbon pool of Northern Kerala, Final report of the project, 2011, p. 13; ISSN 0970-8103.

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Priyanka, B., Chaubey, O. P. and Singhal, P. K., Biomass accumulation and carbon sequestration in Tectona grandis Linn. f. and Gmelina arborea Roxb. Int. J. Bio-Sci. Bio-Technol., 2013, 5, 153–173.

Brown, S. and Luge, A. E., Aboveground biomass estimates for tropical moist forests of the Brazilian Amazon. Jaterciercia, 1992, 17, 8–18.

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Parresol, B. R., Assessing tree and stand biomass: a review with examples and critical comparisons. For. Sci., 1999, 45, 573–593.

Montgomery, D. C., Peck, E. A. and Vining, G. G., Introduction to Linear Regression Analysis, John Wiley & Sons, 2003, 3rd edn.

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Improving Macropropagation and Seed Germination Techniques for Conservation of Threatened Species

Abstract Views :271 | PDF Views:99

Authors

P. C. Panda ¹, S. Kumar ², J. P. Singh ², P. Gajurel ³, P. K. Kamila ¹, S. Kashung ³, R. N. Kulloli ², P. P. Singh ⁴, D. Adhikari ⁴, S. K. Barik ⁴

Affiliations
1 Taxonomy and Conservation Division, Regional Plant Resource Centre, Bhubaneswar 751 015, IN
2 Central Arid Zone Research Institute, Light Industrial Area, Jodhpur 342 003, IN
3 Department of Forestry, North Eastern Regional Institute of Science and Technology, Nirjuli 791 109, IN
4 Department of Botany, North-Eastern Hill University, Shillong 793 022, IN

Source

Current Science, Vol 114, No 03 (2018), Pagination: 562-566

Abstract

Populations of threatened plants are declining rapidly in natural habitats due to various anthropogenic activities. Reinforcement of the dwindling populations through reintroduction is a promising aspect for conservation of threatened plants. However, due to lack of standardized propagation methods of such plants, mass production of planting materials has become a challenge, thereby constraining the replenishment process. Identification of factors constraining the seed germination of threatened plants and addressing it effectively, are among the most cost-effective strategies for large-scale multiplication and subsequent conservation of the threatened species. Similarly, conventional low-cost vegetative propagation techniques such as grafting, air layering, and regenerating plantlets from ischolar_main-suckers, apical meristems, and stem cuttings often prove more successful for multiplication than relatively costly micropropagation techniques. In this article, we present a few case studies on low-cost mass propagation techniques of threatened plant species of India through seed, stem/apical shoot cutting and airlayering, that helped in the restoration of the species.

Keywords

Conservation, Seed Germination, Threatened Plants, Vegetative Propagation.

Full Text

References

Ricketts, T. H. et al., Pinpointing and preventing imminent extinctions. Proc. Natl. Acad. Sci. USA, 2015, 102, 18497–18501.

Menges, E. S., Seed germination percentage increases with population size in a fragmented Prairie species. Conserv. Biol., 1991, 5, 158–164.

Pavlik, B. M., Defining and measuring success. In Restoring Diversity: Strategies for the Reintroduction of Endangered Plants (eds Falk, D. A., Millar, C. I. and Olwell, M.), Island Press, Washington, DC, USA, 1996, pp.127–155.

Van Groenendael, J. M., Ouborg, N. J. and Hendriks, R. J. J., Criteria for the introduction of plant species. Acta Bot. Neerl., 1998, 47, 3–13.

Sarrazin, F. and Barbault, R., Reintroduction: challenges and lessons for basic ecology. Trends Ecol. Evol., 1996, 11, 474–478.

Frankham, R., Ballou, J. D. and Briscoe, D. A., Introduction to Conservation Genetics, Cambridge University Press, Cambridge, 2010, 2nd edn.

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Carr, D. and Dudash, M., Recent approaches into the genetic basis of inbreeding depression in plants. Philos. Trans. R. Soc. Ser. B, 2003, 358, 1071–1084.

Van Dyke, F., Conservation Biology: Foundations, Concepts, Applications, Springer Science & Business Media, Dordrecht, The Netherlands, 2008.

Yadav, S. R. and Kamble, M. Y., Threatened Ceropegias of the Western Ghats and strategies for their conservations. In Special Habitat as and Threatened Plants of India (ed. Rawal, G. S.), In ENVIS: Bulletin Wildlife and Protected Area, Wildlife Institute of India, Dehradun, 2008, vol. 11, p. 239.

Chavan, S. H., Kamble, A. P., Phate, P. V. and Phate, P. V., First report of Ceropegia bulbosa Roxb. From coastal habitat of Kulaba Fort, Alibag, Maharashtra. Indian J. Plant Sci., 2014, ISSN: 2319–3824 (on-line); http://www.cibtech.org/jps.htm

Adhikari, D., Barik, S. K. and Upadhaya, K., Habitat distribution modelling for reintroduction of Ilex khasiana Purk, a critically endangered tree species of northeastern India. Ecol. Eng., 2012, 40, 37–43.

Upadhaya, K., Barik, S. K., Adhikari, D., Baishya, R. and Lakadong, N. J., Regeneration ecology and population status of a critically endangered and endemic tree species (Ilex khasiana Purk.) in north-eastern India. J. For. Res., 2009, 20(3), 223–228.

Gajurel, P. R., Rethy, P. and Kumar, Y., Piper haridasanii: A new species of Piper from Arunachal Pradesh North East, India. J. Econ. Taxon. Bot., 2001, 25(2), 293–296.

Gupta, V., Plants used in folklore medicine by Bangnis of East Kameng, Arunachal Pradesh. Nat. Prod. Radiance, 2005, 5(1), 52–59.

Development of Composite Radial Filter for Recharging Aquifers with Canal Water

Abstract Views :257 | PDF Views:87

Authors

Gaurav ¹, J. P. Singh ¹, P. P. Sahota ², K. Singh ³

Affiliations
1 Department of Soil and Water Engineering,Punjab Agricultural University, Ludhiana 141 027, IN
2 Department of Microbiology, Punjab Agricultural University, Ludhiana 141 027, IN
3 Department of Soil Science, Punjab Agricultural University, Ludhiana 141 027, IN

Source

Current Science, Vol 117, No 1 (2019), Pagination: 87-93

Abstract

A laboratory scale model of composite radial filter was designed, fabricated and tested for recharging aquifer with canal water. Charcoal (C), coarse sand (CS) and gravel (G) filter materials were placed in annular rings of developed radial filter in different combination of thickness, viz. 1 : 1 : 1, 1 : 1 : 2, 1 : 2 : 2 and 1 : 2 : 1 for four treatments T₁, T₂, T₃ and T₄ respectively. Flow equation for discharge through composite radial filter was developed and verified through experiments. The design depth of the filter for given discharge was also obtained. Sodium hypochlorite solution was injected through chlorination unit at the outlet of the radial filter to remove the bacteriological contamination of filtered water. The performance of composite radial filter was evaluated by analyzing canal water before and after filtration. Water quality parameters of filtered water were found to be within permissible limit at low flow rate (0.3 lps). The water quality parameters of filtered water from treatment T₃ with thickness of 10, 20 and 20 cm for C, CS and G respectively was found to be comparatively better than other three treatments (T₁, T₂ and T₄). The composite radial filter consists of C, CS and G filter media having thickness in ratio of 1 : 2 : 2 was found to be the best for recharging groundwater aquifer with canal water.

Keywords

Aquifer, Artificial Recharge, Canal Water, Composite Radial, Filter.

Full Text

References

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Kamra, S. K. and Sharma, D. K., Groundwater recharge structures for small farmers in alluvial regions. In Third Ground Water Congress, Central Ground Water Board, Ministry of Water Resources, Government of India, 2011, 22–23, pp. 168–174.

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Channa, Ali S, Jakhrani, A. Q., Mukwana, K. C. and Jakhrani, S. H., Analysis of physico-chemical and biological quality parameters of Phuleli canal water and wastewater adjacent to Hyderabad city. J. Eng. Sci. Technol., 2015, 14, 26–33.

Zhanga, X., Zhaoa, X., Zhanga, M. and Qian-yuan, W., Safety evaluation of an artificial groundwater recharge system for reclaimed water reuse based on bioassays. Curr. Sci., 2011, 10(5), 657–661.

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Kambale, J. B., Sarangi, A., Singh, D. K. and Singh, A. K., Performance evaluation of filtration unit of groundwater recharge shaft: laboratory study. Curr. Sci., 2009, 96, 471–474.

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Extreme Temperature and Rainfall Event Trends in the Middle Gangetic Plains From 1980 to 2018

Abstract Views :82 | PDF Views:58

Authors

S. Vijayakumar ¹, Sudhir Kumar Rajpoot ², N. Manikandan ³, R. Jayakumara Varadan ⁴, J. P. Singh ², Dibyendu Chatterjee ⁵, ‪Sumanta Chatterjee ⁶, Santosha Rathod ⁷, Anil Kumar Choudhary ⁸, Adarsh Kumar ⁹

Affiliations
1 ICAR-Indian Institute of Rice Research, Hyderabad 500 030, India; ICAR-National Rice Research Institute, Cuttack 753 006, India., IN
2 Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, India., IN
3 ICAR-Central Research Institute for Dryland Agriculture, Hyderabad 500 059, India., IN
4 ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman & Nicobar Islands 744 101, India., IN
5 ICAR-National Rice Research Institute, Cuttack 753 006, India., IN
6 University of Wisconsin-Madison, Madison, WI 53706, USA., US
7 ICAR-Indian Institute of Rice Research, Hyderabad 500 030, India., IN
8 ICAR-Central Potato Research Institute, Shimla 171 001, India; ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India., IN
9 ICAR-National Bureau of Agriculturally Important Microorganisms, Mau Nath Bhanjan 275 103, India., IN

Source

Current Science, Vol 124, No 11 (2023), Pagination: 1300-1307

Abstract

Regional-level studies aimed at identifying and assessing various types of extreme weather events and comprehending their effects on various sectors are crucial. In the present study, we have utilized the RClimDex software to compute the trend in temperature and precipitation extreme events in the Varanasi district of Uttar Pradesh, India, from 1980 to 2018. We employed both Mann–Kendall test and linear regression to test the statistical significance of the computed trend. Out of 13 temperature indices, 8 showed a significant trend while the remaining showed a non-significant trend. The annual mean maximum temperature, warm days, diurnal temperature range and a monthly minimum of maximum temperature had decreased significantly by 0.029ºC, 0.159 days, 0.032ºC and 0.122ºC/yr respectively, whereas cool days and cold spell duration had increased significantly by 0.264ºC and 0.372 days/yr respectively, indicating an increased cooling effect over the study area. Similarly, out of the 11 rainfall indices, only two showed a significant trend, while the remaining showed a non-significant trend. The increasing drought over the study area is evident as the number of rainy days and consecutive wet days have decreased significantly by 0.262 days and 0.058 days/yr respectively, with a non-significant increase in consecutive dry days during the same period. The weak negative non-significant trend of a maximum of five consecutive days of rainfall, very heavy rainfall days and total annual precipitation indicate the decreasing trend of floods. This study stresses the development of adaptation plans to overcome the adverse consequences of extreme weather events in Varanasi district.

Keywords

Adaptation Plans, Climate Change, Extreme Weather Events, Temperature and Rainfall, Statistical Significance, Trends.

Full Text

References

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Localized Eradication of Mango Stone Weevil Sternochetus mangiferae (Fabricius) (Coleoptera: Curculionidae) in India

Abstract Views :42 | PDF Views:43

Authors

Abraham Verghese ¹, M. A. Rashmi ¹, D. K. Nagaraju ², J. P. Singh ²

Affiliations
1 Rashvee-International Phytosanitary Research and Services Pvt Ltd, Bengaluru 560 024, IN
2 Directorate of Plant Protection, Quarantine and Storage, Ministry of Agriculture and Farmers’ Welfare, Department of Agriculture and Farmers’ Welfare, Government of India, NH-IV, Faridabad 121 001, IN

Source

Current Science, Vol 125, No 7 (2023), Pagination: 725-727

Abstract

No Abstract.

Keywords

No Keywords.

Full Text

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