Integrated Nutrient Management Effects on Soil Enzyme Activities, Yield and Proximate Composition of Elephant Foot Yam - Black Gram in Alfisols

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  • K LAXMINARAYANA Regional Centre, ICAR - Central Tuber Crops Research Institute, Bhubaneswar - 751 019, Odisha, India


Alfisol, Black gram, Elephant foot yam, Enzyme activities, Inorganic fertilizers, Organic manure, Soil properties


Field experiments were conducted for two consecutive years during 2018-2020 to study the effect of integrated use of inorganic fertilizers and organic manure on soil health and yield performance of elephant foot yam (Amorphophallus paenifolius L) - black gram (Vigna mungo L) cropping system in an acid Alfisol. Highest mean corm yield of elephant foot yam (26.50 t ha-1), grain and haulm yields of black gram (0.63 and 1.94 t ha-1, respectively) were recorded due to integrated application of farmyard manure (FYM) @ 10 t ha-1 + ½ NPK followed by soil test based doses of 80-30-80 kg ha-1 of N, P2O5 and K2O. Addition of 40, 80 and 120 kg ha-1 of nitrogen (N) showed a corm yield response of 21, 39 and 33% over control, whereas application of 40, 80 and 120 kg ha-1 of potash (K2O) fertilizers showed a yield response of 24, 39 and 46% in elephant foot yam over control, respectively. Incorporation of FYM alone recorded an increase of 24% corm yield over control. The starch, total sugars and dry matter contents in the corms of elephant foot yam were found highest due to the integrated use of FYM + ½NPK. The soil bacteria and actinomycetes are involved in nutrient transformations in the soils and had a significant relationship with yield and proximate composition of elephant foot yam and black gram. Highest dehydrogenase (1.86 µg TPF h-1g-1), fluorescein diacetate hydrolysis assay (2.86 µg TPF h-1 g-1), urease (282 µg NH4-N g-1 h-1), acid and alkaline phosphatase activities (82.3 and 70.3 µg PNP g-1 hr-1) were observed due to conjoint application of FYM + ½NPK. Integrated application of organic manure and half of the soil test based NPK not only sustained the soil quality but also enhanced productivity of elephant foot yam - black gram cropping system in Alfisols.


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How to Cite

LAXMINARAYANA, K. (2024). Integrated Nutrient Management Effects on Soil Enzyme Activities, Yield and Proximate Composition of Elephant Foot Yam - Black Gram in Alfisols. Journal of the Indian Society of Coastal Agricultural Research, 41(2), 61-77.