一、诊断方法 　　1.形态诊断 壮苗植株表现为倒 2、 3叶片大而不披，遇风摇而不甩，呈驴耳型。群体表现为总分蘖数不超过计划成穗数的 2倍以上，叶面积系数最大约 5左右，群体整齐，封行适当。接近孕穗时，行间叶片不搭架，透光度好，中午透光时间长，群体上层叶在阳光下远看 First, the diagnostic methods 1. Morphological diagnosis strong seedling plant performance inverted 2, 3 leaves large and not Phi, shaking the wind without rejection, was donkey ear type. The population showed that the total number of tillers did not exceed 2 times of the planned number of spikes, and the maximum of leaf area coefficient was about 5, and the groups were neat and the seals were appropriate. Close to the booting, the line between the leaves do not frame, transparency, good light at noon, the upper leaves of the group far in the sun