不同地膜覆盖对垄体地温及玉米出苗的影响  

Effects of Different Covering Materials on Soil Temperature and Maize Emergence under Planting Pattern of Ridge and Ditch

作　　者：李倩[1] 张睿[1] 贾志宽[1] 李荣[1] 

机构地区：[1]西北农林科技大学干旱半干旱地区农业研究中心,农业部旱地作物生产与生态重点开放实验室,陕西杨凌712100

出　　处：《西北农业学报》2009年第2期98-102,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：“十一五”国家科技支撑课题“农田集雨保水关键技术研究”(2006BAD29B03)

摘　　要：在玉米沟垄种植模式下对垄上覆盖普通地膜、5%生物降解膜及8%生物降解膜后的土壤温度及玉米出苗状况进行了观测。两年结果表明:①生物降解膜与普通地膜覆盖对土壤均有明显的增温效应,普通地膜、8%及5%生物降解膜表层日均增温分别为3.9、3.46和2.09℃,且随着深度的增加,三种地膜的增温效果都逐渐降低;②普通地膜和8%生物降解膜增温效果的年季间变化较小,两年间极差分别为1.95和2.96℃,而5%生物降解膜两年间极差为5.35℃,年季间变化较大;③地膜和8%生物降解膜覆盖后可将玉米出苗天数分别提前3 d和2 d,而5%生物降解膜覆盖后对出苗情况的影响不明显。Effects of common plastic film,5% biodegradable film and 8% biodegradable film,on soil temperature and maize emergence were observed under planting pattern of ridge and ditch.Two-year results showed that： ① Biodegradable film mulching and common plastic film could significantly improve the soil temperature.Daily mean temperature of the surface soil of common plastic film、8% biodegradable film and 5% biodegradable film mulching were 3.9、3.46 and 2.09℃.With the increase of soil depth,warming effect of the three types of plastic film reduced,② The warming effect of common plastic film and 8% biodegradable film are basically the same from year by year,and the range between tow years of them are 1.95and 2.96℃,but the warming effect of 5% biodegradable film is different between the two years,and the range of it is 5.35℃,③ Maize emergence were promoted by 3 d and 2 d early under common plastic film and 8% biodegradable film mulching respectively,and showed no difference under 8% biodegradable film mulching compared with the control.

关 键 词：生物降解膜 普通地膜 土壤温度 出苗 玉米 

分 类 号：S513[农业科学—作物学]