摘要
经过甜椒、黄瓜二年无土栽培试验的结果,认为河沙:草碳:蛭石=30:2:1为最佳基质。锌肥中 ZnSO_4在 pH7.5时,形成沉淀,不能被作物吸收。络合态锌在 pH 6.8～7.6范围内有效性较高,易被作物吸收。试验结果表明,络合态锌对作物生长、叶绿素含量、产量以及果实含锌量,都优于 ZnSO_4形态,所以络合态锌在北方无土栽培中是最好的锌肥形态。
According to the results of two years'soilless culture with sweet pepper and cucumber,the best ratio for the constitution of substratum is: sand:peat:vermiculite=30:2:1 ZnSO_4 as Zn micro-nutrient at pH7.5 may deposit and cannot be absorbed by plants.Chelated Zn has a higher efficiency at pH6.8～7.6 and is available to plants. The research shows,chelated Zn possesses better results on chlorophyll con- tent,total production and Zn content of vegetables than ZnSO_4,it may be con- sidered that chelated Zn is the best form for soilless culture of vegetables in North China.
关键词
蔬菜
无土栽培
锌形态
基质
soilless culture
substratum
forms of Zinc
