But leaf color (SPAD) descended quickly.The roots grew stagnantly, root length and number of roots stopped increasing, the activity of root and root/shoot ratio descended quickly, and obviously.
但秧苗叶色(SPAD值)迅速下降, 地下部生长停滞, 长、
数停止
,
系活力迅速下降,
冠比明显降低。