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以呼伦贝尔羊草割草地为对象,采用正交试验设计,研究了不同水平的氮磷钾配施对该地区牧草产量和品质的影响。结果表明:(1)CH6(N3P3K3)产量最高(3579.73kg/hm2),显著高于CK(P<0.05)。该地区施肥量的最优组合为氮肥(181.96kg/hm2)+磷肥(321.84kg/hm2)+钾肥(47.01kg/hm2)。(2)牧草营养物质含量对不同施肥配比的响应不同,牧草的粗蛋白质含量CH3(N2P3K3)组合最优;粗脂肪含量的最优组合为CH13(N2P3K2);CH14(N3P2K2)、CH13(N3P2K2)分别是酸性洗涤纤维、中性洗涤纤维含量最优组合。(3)牧草营养物质含量对不同N、P、K施肥水平的响应不同,牧草粗蛋白质质含量和粗脂肪含量分别在N4和K2水平显著高于其他水平,酸性洗涤纤维在P2水平显著低于其他水平,牧草品质最优组合为N4P2K2。综合牧草产量、品质,呼伦贝尔天然割草地进行配方施肥时应保持N肥、P肥用量,减少K肥用量。
Taking the Hulunbeir grass cut mowing as the object, orthogonal design was used to study the effects of different levels of NPK fertilization on the grass yield and quality in the area. The results showed that: (1) The yield of CH6 (N3P3K3) was the highest (3579.73kg / hm2), which was significantly higher than CK (P <0.05). The best combination of fertilization in this area is nitrogen fertilizer (181.96kg / hm2) + phosphate fertilizer (321.84kg / hm2) + potash fertilizer (47.01kg / hm2). (2) The response of forage nutrient content to different fertilizers was different, and the crude protein content of forage grass was the best. The best combination of crude fat content was CH13 (N2P3K2), CH14 (N3P2K2), CH13 (N3P2K2) ) Are the best combination of acidic detergent fiber and neutral detergent fiber. (3) The response of forage nutrient content to different N, P and K fertilizers was different, the crude protein content and crude fat content of forage were significantly higher than other levels at N4 and K2 levels, and the acid detergent fiber at P2 level was significantly lower than Other levels, forage quality best combination of N4P2K2. Integrated forage yield, quality, Hulunbeier natural mowing to maintain the formula fertilizer N, P fertilizer consumption, reduce the amount of K fertilizer.