摘要
研究了施用磷钾肥对紫花苜蓿鲜草产量的影响。结果表明:过磷酸钙600 kg/hm2和硫酸钾100 kg/hm2配合施用,苜蓿鲜草产量最高,较对照增产21.13%。单施过磷酸钙,鲜草产量随施肥水平的提高而增加,各处理第1次刈割鲜草的产量及全年总产量差异均达到极显著水平;单施硫酸钾,各次刈割鲜草产量及全年总产量均随施肥水平的提高呈先升后降趋势,各施肥处理鲜草总产量均较对照差异极显著,但施肥50 kg/hm2与150 kg/hm2处理差异并不显著,以硫酸钾100 kg/hm2处理的产量最高。
Effects of P and K fertilizer on the fresh forage yield of alfalfa were investigated, in order to obtain optimum fertilization practice. The results showed that the greatest alfalfa fresh forage yield was obtained with the fertilizer application treatment of 600 kg/hm^2 superphosphate and 100 kg/hm^2 potassium sulphate. Compared with the control, this treatment increased fresh forage yield by 21.13%. With the different superphosphate application rates, the differences between means of the first fresh forage harvest yields and between the total harvest yields all reached the very significant level. As the fertilizer rate increased, the yields also increased proportionally. With different rates of potassium sulphate application, total fresh forage yield differences between applying and not applying the fertilizer were all very significant. However, total yield differences between application rates of 50 kg/hm^2 and 150 kg/hm^2 were not significant. With the increase in application rate of potassium sulphate, the fresh forage yields increased and then slightly decreased, under the experimental conditions, the optimum rate was 100 kg/hm^2.
出处
《河北农业科学》
2007年第2期64-66,共3页
Journal of Hebei Agricultural Sciences
关键词
过磷酸钙
硫酸钾
紫花苜蓿
鲜草
产量
Superphosphate
Potassium sulphate
Alfalfa
Fresh forage
Yield
