摘要
开展田间试验研究微咸水滴灌条件下不同盐分离子在土壤中的分布特征。试验采用5个水平的微咸水灌溉处理:电导率分别为1.1dS/m(K1),2.2dS/m(K2),2.9dS/m(K3),3.5dS/m(K4)和4.2dS/m(K5),重复3次,按随机区组布置。试验结果表明:滴灌条件下各种盐分离子的迁移速度与分布特性不同,Ca2+、Mg2+与SO42-易于被灌溉水分淋洗,主要分布在湿润体外围,而HCO3-、Na+与Cl-主要分布在湿润体内部。生育期内土壤剖面上的平均盐分含量没有增加,但对土壤结构与作物有重要影响,Cl-、Na+、HCO-3有增加的趋势。
Field experiment was carried out to investigate the distribution characteristic of different salt ions in the soil under drip irrigation with saline water in North China. The experiment included five treatments, in which controlled the mineralization degrees of irrigation water were 1.1 dS/m（K1）, 2.2 dS/m（K2）, 2.9 dS/m（K3）, 3.5 dS/m（K4） and 4.2 dS/m（K5）, respectively. The results showed that the transferring velocity and distribution characteristic of salt ions were affected by water distribution in the soil under drip irrigation condition. Ca^2＋, Mg^2＋ and SO4^2- were easily leached by irrigation water and distributed mainly outside the moist volume, while HCO3^-, Na^＋ and Cl^- mainly distributed in the moist volume. During the growing period, HCO3^-, Na^＋ and Cl^- increased slightly though the total salt content within the soil profile did not increase.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2007年第2期83-87,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家高技术研究发展计划(2002AA2Z4061)
关键词
滴灌
微成水
离子分布
番茄
drip irrigation
saline water
salt ions distribution
tomato
