Leaf number index right should the spike differentiation all stages within different variety were very similar.
不同品种的叶龄指数所对应的雄、雌穗分化各时期是基本一致的。
With 12 maize varieties used as materials, the regression relationship between the leaf number index and spike differentiation were studied under the spring and summer sowing.
以12个玉米品种为材料，在春播与夏播条件下进行玉米叶龄指数与穗分化期回归关系的试验研究。
By the methods of LQ index and ID index, this paper makes a statistical study on the regional differentiation of food supplies in China from 1990 to 2002.
本文采用LQ指数和ID指数，对中国在1990年和2002年粮食生产的区域分化状况进行了统计分析。
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