As a result, the method of using airslake-coal to produce potassium fertilizer including humic acid was varied with different crops.
因此，在利用风化煤生产含腐植酸钾
时，应根据作物类型选择工艺路线。
As a result, the method of using airslake-coal to produce potassium fertilizer including humic acid was varied with different crops.
因此，在利用风化煤生产含腐植酸钾时，应根据作物类型选择工艺路线。
The results showed: inncrease application of Ca, balance application of N and K and sprinkler irrigation could increase Ca content of lettuce leaves, reduce occurring of tipburn.
结果表明，增施
，
衡氮、钾及采取喷灌
方式均能增加生菜叶
含量，减少干烧心发生。
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