盆栽试验指出：不施用cn。

Pot incubation test demonstrates: if not applying CN.

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结论该方法可降低生产成本，不施用有毒有害的溶剂，实现清洁生产。

ConclusionThis method can reduce the cost of production without toxic and harmful solvents and it can realize clean production.

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长期不施用氮肥会使玉米叶片内叶绿素的形成受到限制，不利于有机物质的合成；

Without N fertilizer for years, it will strain synthesis of chlorophyll in maize leaf, and it will go against the synthesise of organic matter. N fertilizer is in favor of the widening o…

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