农田耕作与土壤盐分的变化  

Crop cultivation and the change of soil salt contents

作　　者：雷玉平[1] 田魁祥[1] 孙景玉[1] 山崎素直 但野利秋[3] 

机构地区：[1]中国科学院石家庄农业现代化研究所,石家庄050021 [2]日本东京大学 [3]日本北海道大学

出　　处：《生态农业研究》1995年第3期71-74,共4页Chinese Journal of Eco-agriculture

摘　　要：雷玉平,田魁祥,孙景玉,山崎 素直,但野 利秋:农田耕作与土壤盐分的变化,《生态农业研究》,3(3)1995:71—74 采用原状土隔离池进行了盐分运移的定位试验。结果表明:含盐量0.11—0.28％的轻盐渍化或脱盐潮土处在不断脱盐过程中,平均年脱盐速率为0.0125％;小麦种植期,土壤处于返盐过程,盐分在上层积累;夏玉米种植期,土壤处于脱盐过程;盐分运动是一个盐离子的层次间传递过程,不同盐离子传递的强度不同,以氯根和钠离子变动最大,而硫酸根和钙离子变幅较小,碳酸根较稳定。Location tests on soil salt movement was carried out by using isolated pool with undisturbed soil. Results showed that during crop cultivation period the mildly salinized or desalted Chao soil with salt content of 0. 11 - 0. 28% went on desalination at rate about 0. 0125% per year. During the winter wheat season soil salt moved upward and accumulated on top layer of soil, during summer maize season the soil salt moved downwards to deeper layer of soil. Salt movement can be taken as the transfer of salt ions among soil layers. and the intensity of movement for different salt ion is difference with that of CL- and Na+ being more than SO4-2 and Ca+2, while CO3-2 rarely moves.

关 键 词：农田 耕作 土壤盐分含量 脱盐 

分 类 号：S156.49[农业科学—土壤学]