施肥对两个苜蓿品种饲草产量和品质的影响比较

Study on the Effects of Fertilization on Yield and Quality of Two Varieties of Alfalfa

【目的】平衡施肥,提高饲草产量和品质。【方法】设置不同梯度的N、P、K施肥对两个品种的苜蓿进行施肥试验,研究苜蓿的生长性状、干草产量和品质的影响。【结果】磷360 kg/hm2+钾450 kg/hm2施肥处理时,苜蓿胖多和三得利干草产量最高,达18506.78和17191.97 kg/hm2,各茬干草产量间差异均达到显著水平(P<0.05)。各茬株高明显高于对照(除胖多处理a1第三茬外);胖多各茬次粗蛋白含量比对照高14.00%、23.28%、16.36%,三得利与对照分别高于12.68%、15.69%、21.40%,较对照差异显著(P<0.05)。【结论】在绿洲区内的苜蓿生产,采用磷360 kg/hm2+钾450 kg/hm2施肥处理更有利于胖多和三得利生长能力的发挥,显著提高饲草产量和品质。

【Objective and Method】The objective of this study is to evaluate the effects of different gradient of N,P,K fertilizer application on growth properties,forage yield and quality of Pondus and Sanditi according to field experiment.【Result】The results shows that there is the highest yield of Pondus and Sanditi with Tr3 treatment（applying fertilizer P with 360 kg/hm2 and fertilizer with 450 kg/hm2）,the hay yield is 18 506.78 kg/hm2 and 17 191.97 kg/hm2.And the yield of different cuts has significent difference（P 0.05）;The main stem length of different cuts of Pondus and Sanditi are higher than that of the control（besides pondus with Tra1 treatment of three cuts）.The crude protein content of the three cuts has significant difference（P 0.05）,is increased by 14.00%,23.28% and 16.36% compared with the control.Meanwhile,Sanditi is 12.68%,15.69% and 21.40% higher than that of the control. 【Conclusion】The results suggest that fertilizer P with 360 kg/hm2 and fertilizer k with 450 kg/hm2 application can improve the growth capacity,forage yield and quality.