NPK uptake and biological yield performance of rainfed Bt. cotton under different sources of composts

Abstract

Evaluation of different composts for uptake of NPK and biological yield performance of rainfed Bt. cotton” as conducted during kharif 2023-24 at Research Field of Department of Soil Science, Dr. Panjabrao Deshmukh Krishi Vidhyapeeth, Akola, Maharashtra. There were eight treatments viz. T1- Absolute control, T2-10 t ha-1 FYM, T3-75% RDN through VNIT compost, T4-75% RDN through Vermicompost, T5-75% RDN through PDKV phospho-compost, T6-100% RDN through VNIT compost, T7-100% RDN through Vermicompost and T8-100% RDN through phospho-compost replicated three times in RBD. The results indicated that the significantly highest seed cotton yield (19.49 ha-1), stalk yield (45.11 ha-1), total uptake of N (69.48 ha-1), P (39.32 ha-1) and K (86.42 ha-1) by Bt, cotton (Ajeet 155) was observed with application of 100% RDN through phospho-compost @ 7.5 t ha-1 which was at par to the application of vermicompost @ 10 t ha-1.