Effects of various nitrogen nutrition to the photosynthetic characteristics of flue-cured tobacco under soil drought were studied.
研究了干旱胁迫下不同氮素营养水平对烤烟叶片光合特性的影响。
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氮素营养水平对春玉米的叶片生长有一定的影响。
Nitrogen nutrition level has some influence on the growth and development of spring maize leaves.
大多数纺织废水维持生化所需的氮素营养经常不足。
Since most textile wastes are deficient in nitrogen required for a balanced biological system.
因此，秸秆施用是保持和提高土壤氮素营养的有效措施。
Therefore, straw mulching is an efficient measure to maintain and improve the regime of soil nitrogen nutrition.
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