水稻生育期内紫色土钾素动态变化的研究  

STUDIES ON DYNAMICS OF POTASSIUM IN PURPLE SOILS DURING THE GROWING PERIOD OF RICE

作　　者：熊明彪[1] 石孝均[1] 毛知耘[1] 

机构地区：[1]西南农业大学资源环境学院,重庆400716

出　　处：《西南农业大学学报（自然科学版）》2001年第4期350-352,共3页Journal of Southwest Agricultural University

摘　　要：研究了水稻吸钾规律及其生育期内紫色土钾素动态变化。结果如下 :水稻移栽后 0～ 4 5天内 ,吸钾量逐渐上升 ,4 5天时达最高 ,随后逐渐下降。在 0～ 3 0天内 ,土壤速效钾、非交换性钾变化不明显 ,3 0～ 4 5天则明显下降 ,4 5天时达最低 ,随后逐渐回升 。The pattern of potassium uptake by the rice crop in its growing period and the dynamics of potassium in purple soil were studied. Uptake of K by the rice plants rose steadily after transplanting, reached the maximum in 45 days and dropped gradually thereafter. The content of readily available K and non-exchangeable K in the soil remained little changed in the 0～30 days after transplanting, decreased markedly in the 30～45 days, rose again after that, reached the maximum on the 75 th day after transplanting and remained relatively stable thereafter.

关 键 词：水稻 吸钾规律 钾素动态 紫色土 生育期 

分 类 号：S511.106.2[农业科学—作物学]