Effect of nitrogen sources and soil amendments on growth and yield of rice

Abstract

The field experiment was undertaken to study the impact of different nitrogen as well as mitigation sources application of growth and yield of rice. The experiment was laid out in factorial randomized block design with two factors viz. nitrogen and mitigation sources. The nitrogen sources comprised of Control, 100 kg N ha-1 through Urea, 100 kg N ha-1 through Ammonium Sulphate, 100 kg N ha-1 through Calcium Nitrate, 100 kg N ha-1 through 16:16:16 (50 % Ammonical and 50 % Nitrate N), 100 kg N ha-1 through Vermicompost and RDN through Konkan Annapurna Briquettes. Whereas, another factor comprised of soil amendments consisting Control, Orthosilicic Acid 0.08% @ 15 kg ha-1, Rice Husk Biochar @ 5 t ha-1 and Neem Cake @ 1 t ha-1. The results indicated that, plant height, number of tillers, number of panicle, number of grains per panicle and length of panicle of rice as well grain and straw yield of rice significantly enhanced by application of 100 kg N ha-1 through urea. The number of tillers of rice significantly increased by application of orthosilicic acid 0.08% @ 15 kg ha-1. Therefore it is concluded that, the application of 100 kg N ha-1 through urea along with Orthosilicic Acid 0.08% @ 15 kg ha-1 is beneficial for improving growth and yield of rice crop.