The effects of Cu on rice at same level of N fertilizer were studied.
本文研究了微量元素铜在同样的氮肥量水平下对水稻生育的影响。
The dry root weight under high N level was lower than that under low N level;
单株玉米的根干重随水分条件的改善而提高，高N处理的玉米根重低于相应的低N处理；
The dry root weight under high N level was lower than that under low N level;
单株玉米的根干重随水分条件的改善而提高，高N处理的玉米根重低于相应的低N处理；
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