红豆草间作四翅滨藜对土壤微生物数量及酶活性的影响  

Effects of Atriplex canescens and Onobrychis viciaefolia intercropping on soil microbial quantity and enzyme activity

作　　者：李冰月 张馨馨 南丽丽[1] 刘雪强 谭杰辉 LI Bing-yue;ZHANG Xin-xin;NAN Li-li;LIU Xue-qiang;TAN Jie-hui(College of Pratacultural Science,Gansu Agricultural University,Key Laboratory of Grassland Ecosystem of Ministry of Education,Pratacultural Engineering Laboratory of Gansu Province,Sino-U.S.Centers for Grazingland Ecosystem Sustainability,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2020年第1期85-91,共7页Grassland and Turf

基　　金：国家自然科学基金(31460630);省部共建草业生态系统教育部重点实验室暨草学甘肃省优势特色学科建设(GAU-XKJS-2018-013)项目;现代农业产业技术体系建设专项(CARS-34)资助。

摘　　要：生物修复盐渍化土壤具有持效、稳定数量及酶活性且利于水土保持和生态平衡等优势。通过盆栽方法研究在甘肃盐渍土红豆草和四翅滨藜间作对土壤微生物的影响,结果表明:(1)1行红豆草间作1行四翅滨藜其土壤细菌、放线菌、速效磷含量均最高,分别为14.75×10~3 cfu/g,11.47×10~2 cfu/g,27.28 mg/kg;(2)2行红豆草间作2行四翅滨藜其土壤脱氢酶和碱性磷酸酶均值最小,分别为0.36μg/(g·24 h),0.80 mg/(g·24 h);(3)单作四翅滨藜其细菌、速效磷、速效钾均值最小,分别为9.76×10~3 cfu/g,19.77 mg/kg,54.42 mg/kg。经灰色关联度法综合评价得出1行红豆草间作1行四翅滨藜改土效果最佳,单作四翅滨藜次之,2行红豆草间作2行四翅滨藜效果最差。Bioremediation of saline soil has a persistent and stable effect,it is also beneficial to the conservation of water and soil and ecological balance.The effects of intercropping of legume and chenopodiaceae on soil biological characteristics were studied in saline soil in order to reveal the dominant mechanism of Onobrychis viciaefolia and Atriplex canescens on soil enzyme activity and microbial biomass.The results showed that the soil bacteria and actinomycetes quantities,and available phosphorus content of T3 treatment(1∶1,line)were the highest,i.e.,14.75×103 cfu/g,11.47×102 cfu/g and 27.28 mg/kg,respectively on average.Soil enzyme activities of dehydrogenase and alkaline phosphatase of T4 treatment(2∶2,line)were the lowest,i.e.,0.36 g/(g·24 h),and 0.80 mg/(g·24 h),respectively on average.However,bacteria quantity,available phosphorus and potassium contents of T2 treatment(Atriplex canescens only)were the lowest,i.e.,9.76(×103)cfu/g,19.77 mg/kg and 54.42 mg/kg,respectively on average.The grey relation analysis showed that the soil improvement of T3 treatment was the best,followed by T2 treatment.

关 键 词：红豆草 四翅滨藜 生物改良 盐渍土 

分 类 号：S54[农业科学—作物学]