秸秆还田对小麦幼苗生长和土壤养分变化的影响  

Effect of Straw Returning on Wheat Seedling Growth and the Change of Soil Nutrient

作　　者：董志强[1] 朱红霞[1] 白昕欣 刘璐[1] 刘远[1] 

机构地区：[1]南京信息工程大学应用气象学院,南京210044

出　　处：《中国农学通报》2014年第6期77-81,共5页Chinese Agricultural Science Bulletin

基　　金：2012年校教改提升工程-大学生创新训练项目"增施生物炭对镉污染土壤的改良及蔬菜生长的研究"(N1885012162)

摘　　要：秸秆还田是现代农业生产当中节约的生产调节措施,秸秆还能调节农田生态环境,为植物生长提供养分。本研究目的在于进一步探究,在不同土壤背景下秸秆还田对小麦生长的及土壤养分变化影响。以小麦秸秆为实验材料,按照1%、2%、5%添加到白土、黄泥土、乌栅土中,进行小麦的培养实验,分别在不同时期测定小麦的主要指标,并且在第42天拔出小麦后测定土壤理化性质。试验结果:在3种土壤条件下,小麦的株高、鲜重,叶片叶绿素含量随着秸秆添加量的增加而减小,并且在一定程度上改变了土壤的理化性质。研究表明:在小麦生长初期添加秸秆抑制了小麦的生长发育,并且在不同土壤背景下表现出不同的影响程度。Straw is a saving production and adjustment measure of modern agricultural production. It can regulate farmland ecological environment and provide nutrients for plant growth. The purpose of this study was to further explore the effects of straw returning on wheat growth and soil nutrient variations in the context of different soil. Wheat straw as experimental material of the study, it was added to the whitish soil, huangni soil, wushan soil with the 1%, 2%, 5%, than we determined the main index of wheat in 14-th , 28-th and 42-nd day ,and determined the physicochemieal properties of soil in forty-second day-pulling out the wheat. The results showed that the wheat height, fresh weight and leaf chlorophyll eontent decreased with the increase of addition amount of straw, and that, to some extent, straw returning changed the soil physical and chemical properties. The study showed that adding straw inhibited the normal growth of wheat growth in the seedling growth of wheat, and showed different de^ree of influence in different soil conditions.

关 键 词：秸秆还田 土壤养分 小麦生长 

分 类 号：S512.1[农业科学—作物学]