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

作　　者：王平[1] 

机构地区：[1]甘肃农业大学资源环境系,兰州730070

出　　处：《甘肃农业大学学报》1999年第2期145-150,共6页Journal of Gansu Agricultural University

摘　　要：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.

关 键 词：耕作土壤 吸钾能力 吸钾率 钾肥 

分 类 号：S143.3[农业科学—肥料学]