灰肥可分為草灰、木灰及草木灰肥。其含五氧化二磷

、氧化鉀等元素的量分別如下：草灰
，2.11%～2.36%
、8.09%～10.2%；木灰：3.1%～3.41%、5.92%～12.4%
；草木灰：3.5%、7.5%。此外，草木灰還含有0.9%yishangdeyanghuagai。youyucaomuhuisuohanyoudejiayuansuzhuyaoshitansuanjia
，shujianxingfeiliao
，caomuhuitansuanjiayuantaidanfanyinghouhuichanshenghuifaxinganqiersunshidansu。yinci，caomuhuibuyiyunongjiafeiyuantaidanfeihunheshiyong。rubuyiyutananlvhuaan、硫酸銨
、氨an水shui等deng混hun合he使shi用yong。此ci外wai
，尿niao素su雖sui然ran是shi屬shu於yu中zhong性xing的de有you機ji態tai氮dan肥fei，然ran而er尿niao素su施shi入ru土tu壤rang後hou，被bei水shui解jie成cheng碳tan酸suan銨an或huo碳tan酸suan氫qing銨an。因yin此ci，草cao木mu灰hui仍reng然ran不bu宜yi與yu尿niao素su混hun合he使shi用yong。

草木灰與過磷酸鈣的混用
，要隨混隨用，否則容易產生結塊
，降低應有的肥效。雖然，草木灰不宜與禽畜糞便、人糞尿、antaidanfeidengjinxinghunyong。danzaiduishandizhongzhishuiguoleiguoshudegaitueryan，kejiangyoujifeiyucaomuhuifencengshenshi。zheyang
，jishiliangzhongfeiliaojiechuchanshenganqi，danzhiyaoshihoujishifutu，dansudesunshijiuhuidaweijianshaole。