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秸秆覆盖量对农田土面蒸发的影响 预览 被引量:29

The Study of Influence of Straw Mulch Amount to Soil Moisture Evaporation in Farmland
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摘要 【研究目的】为研究秸秆量与夏玉米农田保墒效果之间关系,【方法】结合小区试验和微型蒸发皿定量观测,研究了0、0.6、0.9、1.2 kg/m^24种不同秸秆覆盖量对农田土面蒸发的影响规律。【结果】试验表明在无种植情况下,秸秆覆盖大于0.6 kg/m^2时,能明显影响和保持0-50 cm土层的土壤含水量。秸秆覆盖量大于0.9 kg/m2时,保墒效果不再明显增加。结合干旱小区玉米试验发现,秸秆覆盖量在0.6-0.9kg/m^2范围时,玉米增产效果明显。【结论】秸秆覆盖量为0.6-0.9 kg/m^2范围时,可获得较好的保水和增产效果。 [OBJECTIVE]This paper mainly studies relationships between straw mulch amount and effects of moisture conservation and evaporation-inhibiting in the summer maize. [METHOD]It studies influential principles of different straw mulch amount (0, 0.6, 0.9, 1.2kg/m^2)to soil moisture evaporation through microlysimeter observation and plots experiment without maize to reach the above objective.[RESULTS]The study shows that straw mulch can greatly influence and keep the soil moisture content under 0-50 cm soil surface when the amount is above 0.6 kg/m^2, and when the amount is above 0.9kg/m^2 the effects of moisture conservation and evaporation-inhibiting will not increase. Also together with study of plots experiment of summer maize the results show that when the straw mulch amount is 0.6-0.9kg/m^2, the summer maize yield can increase greatly. [CONCLUSION]h can finally reach a conclusion that when the straw mulch amount is between 0.6-0.9 kg/m^2, it can get a better effect of moisture conservation and evaporation-inhibiting.
作者 刘超 汪有科 湛景武 段雪松 Liu Chao, Wang Youke, Zhan Jinwu, Duan Xuesong (11nstitute of Soil and Water Conservation, CAS & MWR, Yangling 712100; 2Graduate School of Chinese Academy of Sciences, Beijing 100049; SNorthwest University of Agricultural and Forestry, Yangling 712100)
出处 《中国农学通报》 CSCD 2008年第5期 448-451,共4页 Chinese Agricultural Science Bulletin
基金 国家“863”节水农业重大专项(2002AA224211) 陕西省重大项目“农业节水灌溉技术标准研究与示范”(2006kz08-G3).
关键词 秸秆覆盖量 土壤含水量 土面蒸发 夏玉米产量 straw mulch amount, soil moisture content, soil moisture evaporation, summer maize yield
作者简介 刘超,男,1982年出生,汉族,陕西渭南华县人,硕士。研究方向:农业节水与水土资源高效利用。通信地址:712100陕西省杨凌区西农路26#水土保持研究所节水中心。E-maii:ic162@163.com。 通讯作者:汪有科,男,1956年出生,汉族,大学本科学历,研究员。E-mail:gjzwyk@vip.sina.com。
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