白茎盐生草对盐碱土壤的改良效果  

Effects of Halogeton arachnoideus on saline soil improvement

作　　者：王文[1] 张德罡[1] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070

出　　处：《草业科学》2011年第6期902-904,共3页Pratacultural Science

基　　金：国家牧草产业技术体系岗位科学家基金(CARS-35)

摘　　要：在全盐含量0.49%的土壤中设置人工种植和自然生长白茎盐生草（Halogeton arachnoideus）处理,以裸地为对照,研究种植白茎盐生草对盐碱土壤的改良效果。结果表明,2个处理下的土壤全盐含量明显下降,0~20cm土层分别下降28.57%和32.65%。对盐碱的消除效果0~20 cm土层较20~40 cm好。播种前0~20 cm土壤全盐总量约为11.172 t/hm2,1个生长季后下降为8.738 t/hm2,全盐总量下降2.434 t/hm2,即种植白茎盐生草1年可从0~20 cm土层中除去盐分2.434 t/hm2。试验前后,0~20 cm土壤pH值下降0.13~0.14,下降幅度大于20~40 cm土壤。白茎盐生草对盐分的富集降低了土壤的pH值,达到改良盐碱土壤的目的。The effect of Halogeton arachnoideus on improving saline soil was studied with two treatments（T1,naturally grown H.arachnoideus and T2,planted H.arachnoideus） and bare land as CK.The results indicated that the salt content of saline soil（soluble salt content was 0.49%） was significantly reduced by H.arachnoideus.The salt contents of T1 and T2 were reduced by 28.57% and 32.65 % after one year in the soil layer from 0 to 20 cm,respectively,but showed less change in the soil layer from 20 to 40 cm.After one growing season,the total soil salt content was reduced from11.172 t/ha to 8.738 t/ha.Accordingly,the soil pH value in the soil layer from 0 to 20 cm was reduced by 0.13 to 0.14 units.These results suggested that planting H.arachnoideus could be an effective method to improve saline soil.

关 键 词：白茎盐生草 盐碱土改良 土壤全盐含量 

分 类 号：S156.4[农业科学—土壤学]