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一、廉价的钾肥。草木灰平均含钾5—10％。其中80—90％是水性钾,易被植物根系吸收利用。草木灰作基肥,一般亩用量200—400公斤;也可作叶面喷肥,一般按每亩15公斤草木灰,加热水10公斤,浸泡2小时,滤去残渣后加水50—70公斤喷施。 二、代替石灰中和土壤酸性。草木灰是一种碱性物质,含氧化钙5—30％。在微酸和酸性土壤上施用草木灰,不但补充了植物的钾素养分,也中和了土壤有害酸性物质,增加了土壤钙素,有利于恢复土壤结构。 三、增加地温,减少烂秧与禾苗低温冷害。秧苗
First, cheap potash. Grass ash average potassium 5-10%. 80-90% of which is aqueous potassium, easily absorbed by the plant roots. Grass ash as a base fertilizer, the general amount of 200-400 kilograms of acres; also be used for foliar fertilizer, generally 15 kilograms per acre of ash, 10 kilograms of heated water, soak 2 hours, filtered residue after adding water 50-70 kg spray. Second, instead of lime and soil acidity. Ash is an alkaline substance, containing 5-30% of calcium oxide. The application of ash in slightly acidic and acidic soils not only replenished the plant’s potassium nutrients but also neutralized the harmful acidic substances in the soil, increased the soil calcium and helped to restore the soil structure. Third, increase the ground temperature, reduce rotten seedlings and seedling chilling injury. seedling