Impact of Organic Manures on Nutrient Availability in High Density Guava Orchard
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Date
2020-11
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Sher-e-Kashmir University of Agricultural Sciences and Technology Jammu, J&K
Abstract
The present investigation entitled “Impact of Organic Manures on Nutrient Availability in High Density Guava Orchard” was conducted during 2019-2020 in the experimental farm of horticultural block at Organic Farming Research Centre (OFRC), Chatha at Sher-e-Kashmir University of Agricultural Sciences & Technology, Jammu (J&K). The trial was laid out in randomized block design with 3 replications and 13 treatment combinations. Three years old guava trees under high density (3.0 x 6.0 meter) were applied with alone or in combinations of FYM, vermicompost and poultry manure and biofertilizers (Azotobacter and PSB) during the first week of July month. Application of FYM (25% N) + vermicompost (50% N) + poultry manure (25% N) (T12) recorded maximum water holding capacity (52.10%), soil microbial biomass carbon (97.98 mg kg-1) and organic carbon (7.6 g kg-1). Bulk density improvement were observed, when soil were amended with different organic manures and biofertilizers, but best was recorded in treatment containing FYM (25% N) + vermicompost (50% N) + poultry manure (25% N) (T12). The significantly alteration of electrical conductivity (0.59 dSm-1) was recorded in treatment containing Full dose of N through VC + Azotobacter+ PSB (T6). Significantly highest available N, P & K content of orchard soil were recorded with treatment containing full dose of N through PM + Azotobacter+ PSB (T9). Similarly highest total N (1.73 %), P (0.23%), K (1.28 %) & total chlorophyll (9.96 mg g-1 tissue) of guava leaf were recorded with same treatment. Full dose of N through PM + Azotobacter + PSB (T9) was found best treatment among all the treatments in terms of yield (129.53 q ha-1) and fruit quality parameters i.e TSS (13.97 oB), total sugar (8.33%), vitamin C (219.2 mg pulp-100g) and pectin (0.72%). Treatment containing full dose of N through poultry manure + Azotobacter + PSB (T9) was considered as best treatment with the maximum profit of Rs. 6,52,888 ha-1 and benefit cost ratio of 1: 5.26 under high density plantation.
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