草木灰是一种碱性肥料,是柴草燃烧后形成的灰烬,属于质地疏松的速效性钾肥,一般含有5%～15%的有效钾,还含有钙、镁、硫、磷、铁等元素。草木灰施用在果树上不仅能使果实膨大、含糖量提高,还能防治病虫害。 Ash is an alkaline fertilizer, which is the ashes of firewood after burning. It is a quick-acting potash fertilizer with loose texture and generally contains 5% -15% of available potassium, and also contains elements such as calcium, magnesium, sulfur, phosphorus and iron. Applying plant ash to fruit trees not only enlarges the fruit, but also increases the sugar content and prevents pests and diseases.