VARIATION IN BIOMASS PRODUCTION AND NUTRITIVE VALUE OF Grewia optiva IN DIFFERENT AGRO-CLIMATIC ZONES OF HIMACHAL PRADESH
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Date
2023-09-26
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Variation in biomass production and nutritive value of Grewia
optiva in different agro-climatic zones of Himachal Pradesh.” was carried out in the different agro-climatic
zones of Himachal Pradesh during 2022-23 with the objectives viz., to estimate the biomass and nutritive value
of Grewia optiva in different agro-climatic zones of H.P. and to study the soil physico-chemical properties in
relation to biomass production of Grewia optiva. The composite leaf and soil samples were collected in month
of November from different sites of different agro-climatic zones to analyze the nutritive parameters and soil
physico-chemical properties.
The findings of the present study revealed that, the nutritive value of Grewia optiva varied significantly
across the different agro-climatic zones. The DM, CF, NDF, ADF, TA, AIA and Ca were observed to decrease
with the increasing altitude and ranged between 57.06-45.61, 17.73-12.78, 34.55-30.52, 19.40-13.74, 10.33-
9.38, 2.78-2.09 and 3.87-2.71 per cent, respectively. Whereas, CP, EE, OM and leaf P were observed to increase
with the increasing altitude and ranged between 15.80-20.74, 2.80-4.05, 89.67-90.63 and 0.18-0.34 per cent,
respectively. The TD, diameter, volume, AGB, BGB, TB, AGCD, BGCD and TCD showed a decreasing trend
with altitude and varied between 184.73-121.26 (tree ha-1), 15.76-14.56 (cm), 24.02-12.59 (m3 ha-1), 27.02-
14.16 (Mg ha-1), 7.19-3.77 (Mg ha-1), 34.20-17.92 (Mg ha-1), 12.89-6.72 (Mg C ha-1), 3.41-1.79 (Mg C ha-1) and
16.24-8.51 (Mg C ha-1). The soil SMC and MWHC at both depths were found to be increased with increasing
altitude and ranged between 11.78 and 13.03 to 14.61 and 15.61 per cent, respectively. The BD of soil at both
depths showed a negative trend with altitude and varied between 1.16 and 1.21 to 1.09 and 1.12 g cm-3. The soil
pH and EC decreased as the elevation increases with 6.49-6.64 and 6.27-6.39 pH at Z1 and Z3, respectively and
0.341-0.323 and 0.351-0.335 dS m-1 EC at Z1 and Z3, respectively at both soil depths. Soil OC, available N,
available P and available K ranged between 0.78-1.24 per cent, 227.59-321.44 kg ha-1, 20.80-34.51 kg ha-1and
151.58-237.18 kg ha-1 at D1 and 0.60-1.05 per cent, 197.50-288.69 kg ha-1, 14.93-29.61 kg ha-1 and 135.46-
218.11 kg ha-1 at D2, respectively and was observed to increase with increasing altitude. The soil exchangeable
calcium showed a negative relation with altitude and varied between 8.12-9.71 C mol (p+) kg-1 in Z1 and 7.10-
8.50 C mol (p+) kg-1 in Z3, at both soil depths