菜园土壤氮磷钾硫养分状况的研究

STUDIES ON NITROGEN PHOSPHORUS POTASSIUM AND SULPHUR FERTILIZER STATUS OF VEGETABLE SOIL

试验对哈尔滨市７ 个重点蔬菜产区共 ５９ 个耕层土样进行分析有机质， 全氮、磷、钾、速效氮、磷、钾和有效硫的含量。结果表明： 菜园土壤有机质， 全氮、磷， 速效氮、磷和硫的含量高于相邻粮田。全钾和速效钾的含量与相邻粮田相比， 增加的幅度很小， 并有一半反而下降。粮田土壤的有效硫指数 （ Ｓ Ａ Ｉ） 大部分属于低级。菜田土壤的 Ｓ Ａ Ｉ大部分属于中级。

Analysis the content of O. M., total N. P.K avilable N.P. K and S about fifty-nine plow horizons of seven important vegetable product suburb in Harbin. The result indicated: The O. M., total N. P, the available N. P. S content of sampled soils are higher than the nearly grain soils. There are about fifty percent sampled soils of total K and available K content higher than the nearly grain soils. Most grain soils′ SAI are belong to low and most vegetable soils′ SAI are belong to medium.