穴状衬膜客土整地对滨海盐渍土水盐动态的影响  

Effect of Soil Replacement Preparation with Cave Padded Plastic Film on the Water and Salt Dynamics of Coastal Saline Soil

作　　者：葛根巴图[1,2] 魏天兴[2] 朱金兆[2] 艾宁[2] 赵兴凯[2] 巴音[3] 

机构地区：[1]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200 [2]水土保持与荒漠化防治教育部重点实验室/北京林业大学水土保持学院,北京100083 [3]内蒙古农业大学林学院,内蒙古呼和浩特010019

出　　处：《土壤通报》2015年第2期438-445,共8页Chinese Journal of Soil Science

基　　金：国家科技支撑计划"防海岸带侵蚀沿海泥质海岸防护林体系研究与示范"(2009BADB2B0602)资助

摘　　要：在河北唐山南堡地区,利用穴状衬膜客土整地模式改良盐渍土,结合两年土壤水盐动态监测,研究了该整地模式对滨海盐渍土水盐动态的影响。结果表明:穴状衬膜客土整地改变了滨海盐渍土水分随土层深度增加而增加的分布规律,以20~60cm土层含水量最高,这在一定程度上有益与苗木根系的生长,但对土壤水分动态总体变化趋势影响不大。整地后,各土层电导率持续降低,不再伴随降雨规律出现周期性升降;年内和年际间周期性'返盐'现象有所削弱,积盐土层主要为60~80cm,盐分的表聚作用有所减弱。四种客土处理方式中,A4处理(客土b和原状土2∶1混合的客土)持水性最好,A1处理(客土a和原状土2∶1混合的客土)脱盐效果最好,脱盐率达63.4%。Soil replacement preparation with cave padded plastic film was implemented to ameliorate saline soil in Nanpu economic development area in Tangshan, Hebei Province. Soil water and salt dynamics were continuously monitored for two years to study the effects of soil replacement preparation on coastal saline soil. The results showed that the soil moisture distribution in each soil layer changed after the soil replacement preparation was conducted in this area, with the largest soil moisture in 20 ~ 60 cm layer. It may benefit to the growth and development of the seedling's roots. This differed with the regular rules of moisture distribution in coastal saline soil that soil moisture increased with the depth. However, the effect of the soil replacement preparation on soil water dynamic was not significant. The electrical conductivity of each soil layer kept decreasing after the soil preparation, without regular increase or decrease with precipitation. This indicated that the annual intensity of 'salt regeneration'declined.Moreover, the accumulation of salt in the surface was weakened, and the largest soil salinity appeared at the 60 ~ 80 cm soil layer. Among the four soil preparation treatments, the water capacity of A4 was highest and A1 was the most effective for salt rejection with an amount as much as 63.4%.

关 键 词：滨海盐渍土 水盐动态 穴状衬膜整地 

分 类 号：S156.4[农业科学—土壤学]