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为什么说锄下有水也有火
更新时间: 2020-07-03 00:00:00  

“锄下有水又有火”中的水和火即为保墒和失墒的意思。

天旱时,通过锄划切断土壤毛细管,可减少土壤中水分的蒸腾,起到保墒的作用,即锄下有"水"的含义。

雨后土壤水分过大,影响根系呼吸,及时锄划,可加快水分的散失,有利提高地温,即锄下有"火"的含义。

在农事中,锄地的好处为疏松土壤、消灭杂草等。

关键词: 为什么

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