氮磷钾肥配施对黄河滩区紫花苜蓿产量和品质的影响

Effect of N, P and K fertilization on yield and nutrient quality of alfalfa in Yellow River beach regions

采用田间试验,研究氮、磷、钾肥配施对黄河滩区紫花苜蓿饲草产量和品质的影响.结果表明:氮、磷、钾肥能显著提高紫花苜蓿饲草产量,与未施肥处理相比,施肥处理饲草产量增幅为8.62%～30.92%,氮、磷、钾肥配施效果显著优于单施;配施能显著提高紫花苜蓿粗蛋白、粗纤维、粗灰分、粗脂肪、磷等的含量,且氮、磷、钾肥配施效果显著优于单施;能显著降低紫花苜蓿无氮浸出物含量.

An experiment was carried out in field to investigate effect of N, P and K applied on the yield and nutrient quality of Medicago sativa L.（Alfalfa） in Yellow River beach regions. The results showed the yield of Alfalfa was significantly higher than that of CK with application of N, P and K, the yield was increased by 8.62% to 30.92%, and the effect of N, P and K complex fertilization was better than one single fertilizer application. The content and yield of alfalfa＇s crude protein, crude fiber, crude ash, crude fat and P were significantly increased with application of N, P and K fertilizer, and the effect of N, P and K complex fertilization was better than that of the one single fertilizer. But the content of nitrogen free extract was significantly reduced.