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

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）.