海口市郊菜园土钾素状况及钾肥施用效应研究

Potash Status in the Vegetable Garden Soil of Rural Haikou and Potassium Fertilizer Application Effect

对海口市郊菜园土进行了调查取样分析和盆栽施钾试验。结果表明:①海口市郊菜园土普遍缺钾;②增施钾肥对5种叶菜作物增产效果明显,比对照平均增产6.3%～29.1%;③增施钾肥能提高叶菜的Vc含量6.2%～36.0%。

Sampling analyses were made on the vegetable garden soil of rural Haik ou,and pot experiments were conducted on potassium fertilizer applica tion.The results showed that1)potassium deficiency existed in all the vegetable garden soil of rural Haikou;2)potassium fertilizer application had obvious effect on yield increase of5leaf vegetables,the yields in-creased av eragely6.2%-29.1%comparing to the control;3)potassium fertilizer appli cation could in crease Vc content by6.2%-36.0%in the leaf vegetables.