草木灰(小灰)它是植物燃烧后的残渣。在燃烧过程中,有机物和氮素都已烧掉,因此,草木灰不合有机物及氮,但含有丰富多样的灰分元素,如钙、磷、钾、镁、铁、硫以及各种微量元素,是很好的农家肥料。由于它的肥效主要表现在钾素上,一般就把它当作良好的钾肥。草木灰中的钾,90%以上是水溶性的,主要呈碳酸钾的形态存在。碳酸钾与家庭用的碱有相同的性质,所以农村中常用草木灰的滤水洗涤衣服。因此,草木灰 Ash (small gray) It is the residue of the plant burning. In the combustion process, organic matter and nitrogen have been burned, therefore, ash is not organic and nitrogen, but contains a rich and varied ash elements, such as calcium, phosphorus, potassium, magnesium, iron, sulfur and various trace elements, is very Good farm fertilizer. Because of its effectiveness mainly in potassium, generally regarded it as a good potash. Ash in ash, more than 90% is water-soluble, mainly in the form of potassium carbonate exists. Potassium carbonate has the same properties as household alkalis, so it is common to use filtered water washing of straw in rural areas. Therefore, ash