甘肃省主要耕作土壤对施入钾的吸收能力研究

Absorption of potassium Fertilizer in Major Cultivated Soil of Gansu

研究了甘肃省主要耕作上壤对施入钾吸收的数量和比例。结果表明，经过一次干湿交替后，在施钾0～1600mg／kg范围内，随着施钾数量的增加，土壤中速效钾含量、施入钾被土壤吸收量呈直线上升，吸钾率也逐渐增加。随着干湿交替次数的增加，吸钾量及吸钾率随之增加。对施入钾的吸收率与土壤速效钾含量成负相关。

Amounts and percentages of potassium absorption in major cultivation soil of Gansu province were studied. The results showed that after throtlgh the dry replace the humid,within the limits of 0～ 1 600 mg/kg, soil available potassium increased in linearity with the increase of potassium supply, and the rate of potassium fertilizer absorbed was also increased.Amounts and rates of potassium fertilizer absorbed were increased with the increase of times of the dry replace the humid. potassium fertilizer absorbed was correlated negatively with available potassium.