中度苏打盐碱化土壤微咸水淋洗改良利用模式研究  

Amelioration model of medium saline-alkali soil by leaching with mildly saline groundwater

作　　者：李取生[1] 吴乐知[2] 刘长江[3] 

机构地区：[1]暨南大学环境工程系,广东广州510632 [2]中国科学院土壤研究所,江苏南京210008 [3]中国科学院东北地理与农业生态研究所,吉林长春130062

出　　处：《干旱地区农业研究》2006年第4期164-167,共4页Agricultural Research in the Arid Areas

基　　金：国家"十五"重点科技攻关课题(2004BA508B05);暨南大学引进优秀人才科研启动基金

摘　　要：通过田间试验，研究了用微咸地下水淋洗改良中厦苏打盐碱化土壤对土壤盐碱含量变化和作物产量的影响。结果表明：经过2a 700mm淋洗处理和400mm淋洗处理，0～1．2m深中度盐碱化土壤所有层位的饱和提取液电导率（ECe）均下降到3．0dS／m以下，钠吸附比（SARe）下降到13以下，土壤得到完全改良。700mm淋洗处理和400mm淋洗处理的改良效果没有显著差别。400mm淋洗分2a完成比1a完成的淋洗效果更佳。两个淋洗处理高粱产量分别达到5920kg／hm^2和5355kg／hm^2，玉米产量达到6639kg／hm^2和5872kg／hm^2，接近当地非盐碱地的正常产量水平。The effects of leaching with mildly saline groundwater on salinity and crop yield in medium saline-sodic soils were evaluated in a two-year field experiment. When applied with 700 mm and 400 mm leaching water, the electric conductivity （ECe） of all the soils at 0- 1.2 m depths decreased to less than 3.0 dS/m, and the sodium absorption ratio （ SARe ） decreased to less than 13, indicating that the soils were ameliorated completely. The soil salinity changes were not significantly different between 700 mm and 400 mm leaching treatments. The 400 mm leaching quota applied in two years was better than that applied in one year. The sorghum yields of these two leaching treatments were as high as 5 920 kg/hm^2 and 5 355 kg/m^2, and the corn yields were as high as 6 639 kg/hm^2 and 5 872 kg/hm^2, which were much closed to the average yields on local non-saline soils.

关 键 词：中度苏打盐碱化土壤 微咸地下水 淋洗改良 技术模式 松嫩平原 

分 类 号：S156.4[农业科学—土壤学]