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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。
This study aimed at the special soil geography environment in Karst area and discussed the effects of different fertilization measures on herbage yield and quality. The results showed that increasing potassium fertilizer was beneficial to increase pasture yield and plant potassium and crude ash content increased. In the same amount of nitrogen on the basis of increasing potassium or phosphate fertilizer plant N, P content had no significant effect. The content of crude fat was the highest in the plants treated with high P and K, but the content of crude fat decreased with the increase of mowing times. The content of crude protein in the plants treated with low-phosphorus and low-potassium was the highest, while the content of crude fiber in the plants treated with high-phosphorus and potassium was the highest. Overall, the increase of potassium fertilizer is conducive to improving the yield and quality of pasture.