平衡施肥对喀斯特地区牧草产量及品质的影响

Effect of Balanced Fertilization on Yield and Quality of Forage in Karst Region

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。

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.