Abstract

It is imperative to develop integrated fertilization strategies for various forage crops that enhance the competitive ability of the crop, increase crop production and reduce the risk of nonpoint source pollution from fertilizers. The objectives of this study were to determine the effect of different sources of nutrients on performance of sorghum sudan grass hybrid-oat cropping system. Significantly highest plant height, shoots per square meter, leaf stem ratio and dry matter accumulation of sorghum sudan grass hybrid and oat was observed with FYM @10 t ha⁻¹+Azotobacter+PSB. Not surprisingly, plant height, shoots per square meter, leaf stem ratio and dry matter accumulation increased with increasing fertilizer levels with highest values recorded with 100% RDF. Moreover, significantly highest total green and dry forage yields and gross as well as net returns were recorded in FYM @10 t ha⁻¹+Azotobacter+PSB as well as 100% RDF. FYM @10 t ha⁻¹+Azotobacter+PSB resulted in higher benefit cost ratio, while, significantly highest benefit cost ratio was also recorded with 100% RDF. The system productivity and production efficiency showed its maximum value in FYM @10 t ha⁻¹+Azotobacter+PSB as well as highest level of NPK fertilization.

摘要

必须为各种草料作物制定综合施肥策略，以增强作物的竞争能力，提高作物产量并减少化肥对面源污染的风险。这项研究的目的是确定不同养分来源对苏丹高粱草杂交燕麦种植系统性能的影响。FYM @ 10 t ha ^-1 + Azotobacter观察到高粱高度，苏丹草高粱杂种和燕麦的最高株高，每平方米芽数，茎干比和干物质积累+ PSB。不足为奇的是，随着肥料含量的增加，株高，每平方米的枝条，叶茎比和干物质积累量增加，其中100％RDF记录的最高值。此外，FYM @ 10 t ha ^-1 +固氮菌+ PSB以及100％RDF记录了最高的总绿饲料和干饲料产量以及总收益和净收益。FYM @ 10 t ha ^-1 +固氮菌+ PSB导致较高的收益成本比，而100％RDF也记录到明显最高的收益成本比。该系统的生产率和生产效率在FYM @ 10 t ha ^-1 +固氮菌+ PSB上显示出最大值，在NPK施肥方面表现出最高水平。