Effect of Blended NPS Fertilizer Supplemented with Nitrogen on Yield Components and Yield of Bread Wheat (Triticum aestivum L.)

Abstract

This experiment was conducted to assess the effect of blended NPS fertilizer supplemented with N and to estimate the economically feasible fertilizer rate for higher yield of bread wheat. The experiment consisted of three levels of NPS (100,150 and 200 kg ha^-1) each supplemented with five levels of N (0, 23, 46, 69 and 92 kg N ha^-1) and control. Randomized Complete Block Design in factorial arrangement with three replication was used. The results showed that the days to heading, grain filling period, aboveground dry biomass (AGB) and 1000-kernels weight significantly affected by main effect of NPS and N. The highest (17129 and 16822 kg ha^-1) AGB were obtained due to 200 kg blended NPS ha^-1 and 92 kg N ha^-1, respectively. Also the interaction of NPS with N rate had significant effect on most parameters. The highest grain yield (6832 kg ha^-1),highest number of kernels per spike and highest harvest index were obtained from application of 200 kg NPS ha^-1 with 92 kg of SN ha^-1. The results of the economic analysis showed that the maximum net return was obtained due to the application of 200 kg NPS ha^-1+ 46 kg N ha^-1. In conclusion, a combined application of 200 kg NPS ha^{- 1}supplemented with 46 kg N ha^-1 are recommended to achieve sustainable bread wheat. However, the experiment was conducted only in one location for one season, so further studies at different locations for several years should be conducted in the study area before giving a conclusive recommendation.

Keywords: blended NPS fertilizer; bread wheat; grain yield; inorganic N fertilizer