生物全降解地膜的降解过程与其对玉米生长的影响_乔海军.pdfVIP

DOI :10.13432/j.cnki.jgsau.2008.05.008 2008 10 　　　　　　　 4 3 5 71～75 JOURNAL OF GANSU AGRICULTURAL UNIVERSITY 1, 2 2 2 2 乔海军 ,黄高宝,冯福学, 王利立 (1., 　730070;2., 　730070) 　　:, .:, , , ;(SEM): 170 d , ;、, ; , . 　　:;; 　　:TQ 32, S 513　　　　:A　　　　　:1003-4315(2008)05-0071-05 Degradation and its effect on corn growth of biodegradable ulch fil 1,2 2 2 2 QIAO Hai-jun , HUANG Gao-bao ,FENG Fu-xue ,WANG Li-li (1.College of Science, Gansu Agricultural University, Lanzhou 730070, China; 2.College of Agrono y, Gansu Agricultural University, Lanzhou 730070, China) 　　Abstract:The application of the biodegradable ulch fil s was proved to be an efficient way to solve the plastic pollution in environ ent.This experi ent ainly focused on the degradation of biodegradable ulch fil s and its effect on corn growth.The results showed that the degradation of biodegradable ulch fil s started with s all holes, then the holes beca e bigger,and finally broken down to a lot of pieces at crop harvest stage.Observation of SEM revealed that the surface of biodegradable ulch fil s had obvious flaw at this ti e.Biodegradable ulch fil s had obvious effect on soil te peratureand soil water conserva- tion at early stage of corn growth,but its effect on raising soil te perature weakened at the iddle and lat- er stages of corn growth.The effect of covering degradable ulch fil s on corn yields was significant, but there was no obvious difference co pared to that of ordinary fil . 　　Key words:biodegradable ulch fil ;corn;degradation in field 　　 , [3] , 、 ., [1] ., , 、/ “”,