Growth of Transplanted Rice as Influenced by Enriched Nitrogen Sources at Different Levels

Abstract

The field experiment was carried out during kharif, 2018 at the research farm of the ICAR, Indian Institute of Rice Research (IIRR), Hyderabad (TS) to study the growth of transplanted rice as influenced by the enriched nitrogen sources at different levels. The experiment was laid out in randomized block design with eleven treatments viz., T1 Control (0:60:40 kg N:P:K ha-1), T2 (75% Recommended Dose of Nitrogen (RDN) through neem coated urea), T3 (75% RDN through enriched rice straw compost with trichoderma), T4 (75% RDN through vermicompost), T5 (75% RDN through neem coated urea + nitrification inhibitor), T6 (75% RDN (50% RDN through vermicompost + 25% RDN through neem coated urea + nitrification inhibitor ), T7 (100% RDN through neem coated urea), T8 (100% RDN through enriched rice straw compost with trichoderma), T9 (100% RDN through vermicompost), T10 (100% RDN through neem coated urea + nitrification inhibitor) and T11 (100% RDN (50% RDN through vermicompost + 50% RDN through neem coated urea + nitrification inhibitor). From this study it can be concluded that application of 100% RDN through neem coated urea resulted in highest plant height at 90 Days after transplanting (DAT) and at harvest, tillers m-2 at 60 DAT and at harvest, dry matter production at 90 DAT and at harvest, SPAD meter readings at 60 DAT and 90 DAT. Similarly, lowest plant height, tillers m-2, dry matter production and SPAD meter readings were recorded for control.

Utilizing Urea–Chitosan Nanohybrid for Minimizing Synthetic Urea Application and Maximizing Oryza sativa L. Productivity and N Uptake

“…In all grain crops, individual mass grain is determined based on reserves of assimilates stored in the vigorous vegetative phase and on the C assimilation rate during grain filling [63,64]. In addition, adequate and balanced fertilizer N at panicle initiation works on optimizing both the weight and number of spikelets to ensure a high yield outcome [65][66][67][68]. The effect of engineered CS NP may occur by decreasing the total soluble sugar and by increasing polysaccharides, which is reflected positively on both carbohydrate and protein contents in yielded grain [28].…”