不同施肥配比对黔草4号鸭茅牧草产量的影响

采用四元二次回归旋转组合设计方法，对氮、磷、钾、有机肥4个栽培因子对黔草4号鸭茅鲜草产量的影响进行研究。结果表明，对黔草4号鸭茅产量的影响以有机肥最大，其次为氮肥、磷肥，影响最小的是钾肥；当黔草4号鸭茅产草量达到高产目标5100k~667m^2时，要求每667m2有机肥用量为3000kg、氮肥用量为30kg、磷肥用量为20kg、钾肥用量为20kg。

Influence of Different Fertilizer Proportion on Herbage Yield of Orchardgrass Qiancao NO.4

The influence of nitrogen, phosphorus, potash and organic fertilizer on the yield of orchardgrass Qiancao NO.4 were evaluated by using quaternary quadratic regression rotation combination design methods. The results showed that the organic fertilizer had the greatest impact on yield of orehardgrass Qiancao NO.4, followed by nitrogen and potash fertilizer, the phosphorus fertilizer has the least impact on the yield; when the yield of orchardgrass Qiancao NO.4 achieved as high as 5 100 kg/667 m2, a total of 3 000 kg organic fertilizer, 30 kg nitrogen fertilizer, 20 kg phosphate fertilizer and 20 kg potash fertilizer were required per 667 m2.