平衡施肥对喀斯特地区牧草产量及品质的影响

摘要

Effect of different fertilization methods on yield and quality of forage was investigated in Karst region. The results indicate that K application increased forge yield, K content and crude ash content in plants. Under the same amount of N fertilizer, the application of P or K did not significantly affect N and P contents in plants. Higher application of P and K fertilizer had the highest content of crude fat in plants, but fat content decreased with the increased collecting times. Low P and K treatment had the highest content of crude protein while high P and medium K treatment had the highest content of crude fiber. In a word, K application can improve the yield and quality of forage.%本研究针对喀斯特地区特殊的土壤地理环境,探讨不同施肥措施对牧草产量及品质的影响.结果表明,增施钾肥有利于提高牧草产量,植株钾和粗灰分含量增加.在等量氮肥基础上,增施钾肥或磷肥对植株N、P含量没有明显影响.高磷高钾处理下植株中粗脂肪含量最高,但随着刈割次数的增加,粗脂肪含量逐渐降低.低磷低钾处理下植株中粗蛋白含量最高,而高磷中钾处理下植物中粗纤维含量最高.总体来看,增施钾肥有利于提高牧草的产量及品质.