氮磷钾配比施肥对敖汉苜蓿产量和品质的影响  

Effects of nitrogen,phosphorus and potassium ratio fertilizer on the the yield and quality of Aohan alfafa

作　　者：赵云[1] 谢开云[1] 杨秀芳[2] 李向林[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所,北京100193 [2]内蒙古赤峰市农牧科学研究院,内蒙古赤峰024031

出　　处：《草业科学》2013年第5期723-727,共5页Pratacultural Science

基　　金："十二五"国家科技计划(2011BAD17B01);国家牧草产业技术体系(CARS-35-12)

摘　　要：采用完全随机区组设计,研究了32个氮磷钾施肥配比处理组合对赤峰地区敖汉苜蓿(Medicage sativa cv.Aohan)产量和品质的影响。结果表明,施氮肥可以显著提高苜蓿第1年的产量(P<0.05),苜蓿产量从2.90t·ha-1提高至3.16t·ha-1,但施用氮肥对于紫花苜蓿第2年产量的提高幅度较小。磷肥和钾肥处理下敖汉苜蓿的产量差异显著(P<0.05),而钾肥施入量对苜蓿产量的效果则没有氮肥与磷肥明显。施氮肥可以使苜蓿粗蛋白质含量从17.75%提高至18.74%。施磷肥和钾肥也可以提高苜蓿粗蛋白含量,磷肥处理下产量差异显著(P<0.05),但钾肥处理下差异并不显著(P>0.05)。Randomized block design and 32 different fertilizer treatments combination were used to analyze the effect of different N, P and K combined fertilizer applied on the yield and quality of Aohan alfalfa （Medicago sativa cv. Aohan） in Chifeng region. The results showed that N fertilizer significantly in- creased the yield of the first year alfalfa（P〈0.05）, from 2.90 t . ha-1 to 3.16 t . ha-1 , but the rate of the increase decreased in the second year. P and K fertilizer also significantly improved the yield of alfalfa（P〈 0.05）, but the effect of K fertilizer was poor than the effect of N and P fertilizer. The crude protein con- tent of alfalfa increased from 17.74% to 18.72% after applied N fertilizer. When applied P and K fertiliz- er, the crude protein content of alfalfa also increased and the difference were not significant（P〈0.05）.

关 键 词：紫花苜蓿 NPK施肥 产量 品质 

分 类 号：S541.9[农业科学—作物学]