小麦/玉米套作田棵间土壤蒸发的数学模拟
为了探明小麦/玉米套作条件下棵间土壤蒸发规律及内在机制,该文将Ritchie模型和间套作群体光能传输模型结合起来模拟了小麦/玉米套作田的棵间土壤蒸发,并用2012年和2013年微型蒸渗仪的实测值对该方法进行了验证。结果表明,2 a模拟值和实测值的变化趋势都非常一致。与实测蒸发相比,该文所建模型2012年模拟结果的均方根误差为0.447 mm/d,平均绝对误差为0.331 mm/d,分别比原Ritchie模型降低16.8%和20.8%。在实测数据的88 d,累计实测蒸发量为107.2 mm,而模型的模拟值为100.5 mm,仅低估实测值6.7%。在2013年实测数据的68 d,累计实测蒸发量为8...
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| Published in | 农业工程学报 Vol. 29; no. 21; pp. 72 - 81 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
西北农林科技大学水利与建筑工程学院，杨凌 712100
2013
中科院水利部水土保持研究所，杨凌 712100 中科院水利部水土保持研究所，杨凌 712100%中国旱区节水农业研究院，杨凌 712100 中国旱区节水农业研究院，杨凌 712100%西北农林科技大学水利与建筑工程学院，杨凌 712100 中国旱区节水农业研究院，杨凌 712100 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.3969/j.issn.1002-6819.2013.21.010 |
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| Summary: | 为了探明小麦/玉米套作条件下棵间土壤蒸发规律及内在机制,该文将Ritchie模型和间套作群体光能传输模型结合起来模拟了小麦/玉米套作田的棵间土壤蒸发,并用2012年和2013年微型蒸渗仪的实测值对该方法进行了验证。结果表明,2 a模拟值和实测值的变化趋势都非常一致。与实测蒸发相比,该文所建模型2012年模拟结果的均方根误差为0.447 mm/d,平均绝对误差为0.331 mm/d,分别比原Ritchie模型降低16.8%和20.8%。在实测数据的88 d,累计实测蒸发量为107.2 mm,而模型的模拟值为100.5 mm,仅低估实测值6.7%。在2013年实测数据的68 d,累计实测蒸发量为83.1 mm,而模型的模拟值为73.7 mm,低估11.3%。模拟值与实测值的均方根误差和平均绝对误差分别为0.465和0.333 mm/d,略大于2012年。套作群体根系层水量平衡分析结果表明,小麦/玉米套作系统整个生育期土壤蒸发占总蒸发蒸腾的比例高达41.1%,故有必要在该套作农田实施秸秆覆盖等农艺措施,以减少棵间土壤蒸发,提高土壤水分的利用效率。该研究成果可为小麦套作种植模式下田间水分管理提供依据。 |
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| Bibliography: | 11-2047/S crops; soils; evaporation; wheat/maize intercropping; Ritchie model; Hetao irrigation district Wang Zikui, Wu Pute, Zhao Xining, Wang Yubao, Gao Ying （1. College of Water Resources and ,4rchitectural Engineering, Northwest ,A＆F University, Yangling 712100, China; 2 Institute of Water Saving Agriculture in ,4rid Regions of China, Yangling 712100, China; 3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China） Soil evaporation is one of the most important components of crop field water balances, especially in arid and semiarid environments where soil evaporation can be prominent due to incomplete cover. Understanding and reducing this part of water consumption is important, since it can not be used by a crop. The effects of a crop and of crop management on this water loss from the soil have been estimated in the past using combinations of field measurement and simple models, but few works have been done for the wheat/maize intercrop |
| ISSN: | 1002-6819 |
| DOI: | 10.3969/j.issn.1002-6819.2013.21.010 |