草木灰是植物燃烧后的残渣,含有6%—12%的氧化钾,也含有较高的钙和磷,还含有镁、铁、硼、锌、铜等微量元素,是一种较理想的优质农家肥。我国广大农村的生活能源主要是靠大量的秸秆、树枝、落叶等做燃料,所以草木灰是农村重要的钾肥肥源。 Plant ash is a residue of plant combustion, containing 6% -12% of potassium oxide, also contains higher calcium and phosphorus, but also contains trace elements such as magnesium, iron, boron, zinc, copper, is a better quality farm fat. The vast majority of rural life energy in our country mainly rely on a lot of straw, branches, leaves and other fuels, so ash is an important source of potassium fertilizer in rural areas.