Vol. 11, Special Issue 7 (2022)

Author(s):
Chandrabhan Bharti, Vishram Ram and Rahul Patidar

Abstract:
In Meghalaya, the quantity of nitrogen fertilizer applied, but it’s being considered as high rainfall areas the losses are increased. As a consequence of high rainfall areas its loss through leaching and runoff which reduced the utilization rate. Newly developed rice varieties have fertilizer responsive with better nutrient translocation ability from source to sink compared to common rice. That leads to urgent further consideration of appropriate rate of nitrogen fertilizer to be applied. A field experiment with 5 nitrogen levels such as 0, 30, 60, 90, 120, 150 kg ha^-1 and 3 split application, 1^st Split (50% as basal + 50% at 45 DAT as top dressing), 2^nd Split (50% as basal + 25% at 45 DAT and 25% at 60 DAT as top dressing) and 3^rd Split (25% as basal + 25% at 45 DAT, 25% at 60 DAT and 25% at 75 DAT as top dressing) with Shahsarang variety during 2018-19 and 2019-20. Growth, yield attributes and grain yield along with harvest index were measured. The results showed that with the increase nitrogen dose with different splitting in ascertain range, the number of tillers, dry matter production, test weight along with grain and straw yields increased while the harvest index (HI), decreased beyond 120 kg N ha^-1. Additionally, with the increase of nitrogen application, the grain yield and harvest index (HI) of rice followed a parabolic trend.