甘肃永登灌区四翅滨藜根际土壤盐分的变化  

Changes of Rhizosphere Soil Salinity Around Atriplex canescens in Yongdeng Irrigation Area of Gansu Province

作　　者：张怀山[1] 代立兰 杨世柱[1] 王平 王国宇 

机构地区：[1]中国农业科学院兰州畜牧与兽药研究所农业部兰州黄土高原生态环境重点野外科学观测试验站,兰州730050 [2]甘肃省兰州市农业科技研究推广中心,兰州730000

出　　处：《中国草食动物科学》2017年第6期31-35,共5页China Herbivore Science

基　　金：甘肃省农业科技创新项目(GNCX-2013-58);中国农业科学院科技创新工程专项资金项目(CAAS-ASTIP-2016-LIHPS-08)

摘　　要：为研究四翅滨藜的耐盐性和对盐渍化土壤的改良作用,选择甘肃永登灌溉农业区次生盐渍化土壤4个试验点,测定不同种植年限四翅滨藜根际土壤的盐离子浓度、pH值和电导率(EC值)变化。结果表明:1年期四翅滨藜根际土壤盐离子浓度略有下降,2年期和3年期四翅滨藜根际土壤盐离子浓度明显下降;根际土壤p H值逐年下降;四翅滨藜叶片电导率逐年增加;0~80 cm土层电导率逐年下降。说明四翅滨藜对于根际土壤的盐离子具有吸收分化作用,可以明显改善土壤的生态环境(pH值、EC值),是一种绿色安全的盐渍化土壤生物改良植物。In order to study the salt tolerance and salinity soil improvement of Atriplex canescens,four experimental sites with secondary salinized soil in Yongdeng irrigation agricultural area of Gansu province were selected. The rhizosphere soil salt concentration,pH and EC of Aiplex canescens in different planting years were determined. The results showed that the rhizosphere soil salt concentration decreased slightly after having been planted for one year,and decreased significantly after having been planted for two and three years,the rhizosphere soil pH and EC decreased and leaf EC of Aiplex canescens increased with planting years. It showed that Aiplex canescens could absorb and differentiate salinity in rhizosphere soil and improve soil ecological environment（pH,EC）. Aiplex canescens is green and safe to improve salinized soil.

关 键 词：四翅滨藜 灌溉农业区 盐渍化土壤 盐分变化 

分 类 号：S54[农业科学—作物学]