| 基于ECH_2O的覆膜对土壤水热状况影响的试验研究 |
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| 引用本文： | 杨建房,李思恩,丁日升,胡铁民.基于ECH_2O的覆膜对土壤水热状况影响的试验研究[J].灌溉排水学报,2012(1):69-72. |
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| 作者姓名： | 杨建房 李思恩 丁日升 胡铁民 |
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| 作者单位： | 西北农林科技大学;中国农业大学中国农业水问题研究中心;武威市水利技术综合服务中心 |
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| 基金项目： | 国家自然科学基金重点项目(50939005);高等学校博士学科点专项科研基金(20100008120026) |
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| 摘 要： | 为研究覆膜对土壤水热运移的细微影响,利用土壤水热盐自动监测系统(ECH2O)对西北干旱区的玉米地进行了高分辨率的定点连续监测。发现覆膜对改善土壤表层水热状况有显著效果,覆膜处理下表层土壤含水量低于不覆膜处理,地温高于不覆膜处理对应值。在10cm深度,覆膜处理的土壤含水量较不覆膜处理低;而在20cm及40cm深度,覆膜处理的土壤含水量较不覆膜处理高。覆膜对不同深度地温均有提升作用,但在玉米不同生育阶段其影响程度不同:覆膜对地温的影响在生育末期最为显著;在10cm深度,覆膜处理的地温高于不覆膜处理,在40cm和60cm深度,差异较小。
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| 关 键 词： | 覆膜 玉米 ECH2O 土壤含水量 地温 |
Effects of Plastic Film Mulching on Soil Water and Heat Conditions Based on ECH2O |
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| YANG Jian-fang,LI Si-en,DING Ri-sheng,HU Tie-min.Effects of Plastic Film Mulching on Soil Water and Heat Conditions Based on ECH2O[J].Journal of Irrigation and Drainage,2012(1):69-72. |
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| Authors: | YANG Jian-fang LI Si-en DING Ri-sheng HU Tie-min |
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| Institution: | 1.Northwest A & F University,Yangling 712100,China;2.Center for Agricultural Water Research in China,China Agricultural University,Beijing 100083,China; 3.Comprehensive Service Center of Water Conservancy Technology in Wuwei,Wuwei 733000,China) |
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| Abstract: | In this study,high-resolution soil water-heat-salt automatic monitoring systems(ECH2O) were used to continuously monitor the maize fields in fixed points in arid area of Northwest China.According to the observation data,plastic film mulching had remarkable effect on improving soil surface water and heat conditions.The water content of soil surface with plastic film mulching was lower than without it,while the soil temperature was higher.At the 10 cm depth,the water content of soil was lower with plastic film mulching than without it;but at the 20 cm and 40 cm depths,the result was opposite.Plastic film mulching was able to promote the soil temperature,but the degree was different at different periods of maize and different soil depths.At the 10cm depth,the soil temperature with plastic film mulching was higher than without it,while at the 40 cm and 60 cm depths the difference was smaller. |
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| Keywords: | plastic film mulching maize ECH2O soil water content soil temperature |
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