Studies on nutrient uptake of crop and residual soil fertility affected by planting time, organic sources of nutrient and LCC based N application under SRI

Abstract

Current study was set up to find out how nutrient uptake and residual soil fertility responded to planting time, organic sources of nutrient and LCC based N application. There were total 20 treatments. Eighteen treatments were comprised of factorial combinations of two planting times (i. e. at two-leaved stage and three to four-leaved stage), three organic sources (FYM 10 t/ha, FYM 5 t/ha, FYM 5 t/ha+Azospirillum) and three N applications (blanket split, LCC at 3 and at 4). There were two absolute controls under each planting stage. Uptakes of N, P and K were significantly higher under two leaved stage treatment. In respect of nutrient uptake, FYM 10 t/ha was observed better than half of its doses with or without Azospirillum through application of Azospirillum with FYM 5 t/ha was responded positively than FYM 5 t/ha alone. There was positive response from LCC based N management to obtain higher N, P and K uptakes. Soil pH, organic carbon and available N were not significantly influenced by planting time and methods of N application treatments. Organic carbon was also not influenced by organic sources. Available P2O5 and K2O significantly responded to planting time, organic sources and methods of N application.