The different application level was tested in ryegrass planted in the rice field with no-tillage to study the effect of balanced application on ryegrass yield and the optimum application combination and proportion. The results showed that the grass yield of ryegrass fertilized with compound fertilizer was the highest among all treatments and its fertilizing cost and net income was 60％ and 5. 4 times of the ryegrass treatment fertilized with urea, the grass yield and net income of the ryegrass treatment fertilized with urea and compound fertilizer was higher than the treatments fertilized with urea or compound fertilizer, and the grass yield and net income of the treatment fertilized with urea and compound fertilizer (1: 2) reached the optimum value and its input-output ratio was 1 : 2.23.%为探讨平衡施肥对稻田免耕黑麦草产草量的影响,找到最佳的施肥组合和施肥比例,采用罗甸县农户普遍使用的尿素和复合肥进行追肥试验.结果表明:单施复合肥(N:P:K=10%:7%:8%)组比单施尿素组产草量高,施肥成本是单施尿素组的60%,净收益是单施尿素组的5.4倍;产草量和净收益呈尿素与复合肥混施组均比单施尿素组、复合肥组高,当尿素与复合肥混施比例为1:2时,其产草量、净收益均达到最佳值,投入产出比为1:2.23,因此,免耕黑麦草田间施肥应采用尿素与复合肥混施,混施比例为1:2,尽量避免单施尿素.
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