不同覆盖方式对玉米幼苗生长及根冠比的影响  

Effects of Different Covering on Seeding Growth and Root-shoot Ratio of Corn

作　　者：朗杰[1] 王军峰[1] 王超[1] 罗安荣[1] 关志华[1] 王贵作[2] 章先贵[1] 

机构地区：[1]西藏大学农牧学院,西藏林芝860000 [2]水利部发展研究中心,北京100038

出　　处：《西南农业学报》2015年第6期2451-2454,共4页Southwest China Journal of Agricultural Sciences

基　　金：中国科学院科技服务网络计划项目"西藏农林牧结合村农林牧一体化技术体系示范"(KFJ-EW-STS-073);西藏科技厅项目"林芝地区庭院农业资源利用与蕨麻产品开发";西藏野生特色生物资源开发平台项目;西藏大学农牧学院重点学科(蔬菜学)建设项目

摘　　要：试验采用对比方法研究3种处理(SF草浆地膜覆膜处理、PF塑料地膜覆膜处理、CK不覆盖)下玉米的生长效果。结果表明:覆膜处理可以提高土壤的湿度与含水量,各处理的土壤湿度与土壤含水量比较PF>SF>CK。覆膜处理改善了土壤生态环境对植株生长有明显的促进作用。由于PF完全物理阻隔了土壤与空气之间水热交换所以保水保温效果优于SF,所以从植株的生长状况比较发现,各处理植株的株高、茎粗都表现为PF>SF>CK,各处理差异不显著(P>0.05,n=6)。植株根长也表现为:PF>SF>CK,但各处理差异不显著(P>0.05,n=6),各处理植株的根冠比为PF>CK>SF。由于草浆地膜具有保水保温效果,促进玉米幼苗生长,因此在生产中值得推广应用。The pot experiments were conducted under three film mulch treatments,which were,SF treatment of covering straw pulp film mulching,PF treatment of covering plastic film,CK,to analyze the effect of water conditions on the growth of stem and leaf and shoot of corn with comparison. The result showed that treatment of covering plastic film or straw pulp film could improve the humidity and water content of soil,treatment of covering plastic film or straw pulp film had significantly improved the humidity of the soil. The treatment of covering plastic film or straw pulp improved the ecological environment of soil and significantly improved the growth of the corn. The treatment of covering plastic film barriered hydrothermal exchange between the soil and air completely,so the effects of water preservation and heat preservation were better than the treatment of covering straw pulp film. From the status of corn growth between the three different treatments,no matter the plant height,the stem diameter,the length of leaf and the growth rate of the leaf showed that： PF SF CK,with no significant difference among them（ P 0. 05,n = 6）. Although the length of root showed that： PF SF CK,there was no significant difference among them（ P 0. 05,n = 6）,the result of the root-shoot ratio was PF CK SF. The straw pulp film exerted effect on water preservation and heat preservation in a certain period of time,and exerted smaller effect on soil pollution than plastic film,therefore the straw pulp film can be used as a substitute for plastic film in arid areas.

关 键 词：草浆地膜 根冠比 玉米 温湿度 

分 类 号：S513[农业科学—作物学]