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雨水。雨水是一种接近中性的水,在其凝结和降落过程中,能溶解空气中的氮化物;同时,雨水中有毒有害物质含量少,活性强,用雨水浸种,有利于种子发芽和幼苗生长。
rainwater. Rainwater is a kind of near-neutral water, which can dissolve nitrogen in the air during its condensation and landing. At the same time, it has less toxic and harmful substances in rainwater and strong activity. Soaking rainwater is conducive to seed germination and seedling growth .