肥料与密度对春大麦抽穗期叶面积指数的影响

Effects of Fertilizer and Density on Leaf Area Index Spring Barley at Heading Stage

以大麦新品种"蒙啤麦5号"为试验材料,研究了肥料与密度对其抽穗期叶面积指数的影响.结果表明,在一定范围内增施氮、磷、钾肥能够有效提高该品种大麦抽穗期的叶面积指数.而种植密度的大小对其叶面积指数也有着一定的影响.而该品种大麦可获得最高理论抽穗期叶面积指数为5.2871,相应的栽培措施是N118.71 kg/hm^2、P_2O_5 112.74 kg/hm^2、K_2O 68.80 kg/hm^2、密度552.68万株/hm^2.

The effect of fertilizer and density on leaf area index at heading stage of a new barley variety＂Mengpimai NO.5＂was determined.Within a certain range, increasing nitrogen, phosphorus, potassium fertilizer could effectively improve the leaf area index of heading barley.The plant density also had an influence on its leaf area index.At the highest theoretical heading stage,the leaf area index of barley 5.2871 was obtained,and the corresponding cultivar measures were nitrogen fertilizer（N） 105.58 kg/hm^2, phosphate fertilizer（P_2O_5） 117.53 kg/hm^2, and potash fertilizer（K_2O）70.05 kg/hm^2, at a density 565.21 Million hm^2.