贵州人工草地-农田界面土壤水热耦合影响域动态变化研究

发布时间：2018-06-03 10:31

本文选题：人工草地-农田 + 界面影响域　；参考：《草地学报》2017年02期

【摘要】：通过对贵州人工草地-农田界面表层土壤(0~20cm)的调查采样和室内分析,明确界面土壤水分和温度的空间变化特征,利用水分和温度双因素耦合来判定界面影响域,探讨其季节性动态变化过程。结果表明:人工草地土壤水分四季分别为60.7%±0.31,23.6%±0.20,19.7%±0.20和70.4%±0.19,均高于农田的34.5%±0.52,11.8%±0.23,10.0%±0.19和64.1%±0.13;土壤温度空间变化表现为夏秋季节草地低于农田,冬春季节草地高于农田;贵州农田-人工草地界面四季土壤水热耦合影响域处于一个动态变化的过程,呈现为"窄-宽-窄"的规律;四季界面影响域宽度分别为25,28,34和29m。利用双因素耦合判定界面影响域能够在一定程度上避免单因素判定造成的"偏向性"结果。
[Abstract]:The spatial variation characteristics of soil moisture and temperature were determined by sampling and indoor analysis on the surface soil of the artificial grassland and farmland interface in Guizhou Province, and the interfacial influence area was determined by the coupling of water and temperature. The seasonal dynamic change process is discussed. The results showed that the soil moisture content of artificial grassland was 60.7% 卤0.31 23.6% 卤0.20% 卤0.20% 卤0.20 卤0.19 in four seasons, which was higher than that of farmland (34.5% 卤0.52% 卤0.232% 卤10.0% 卤0.19 and 64.1% 卤0.13), and the spatial variation of soil temperature was lower in summer and autumn season than in winter and spring season. The interaction between soil water and heat at the interface of farmland and artificial grassland in Guizhou Province is in a dynamic process of "narrow-wide-narrow", and the width of the interface of four seasons is 25 ~ 2834 and 29 m, respectively. To a certain extent, the "bias" result caused by single factor decision can be avoided by using two-factor coupling to determine the influence region of the interface.
【作者单位】：贵州大学动物科学学院;贵州省草地技术试验推广站;
【基金】：国家自然科学基金项目(31560670) 贵州省科技厅项目(黔科合NY字[2012]3011号) 贵州大学研究生创新基金项目(研农2016020)资助
【分类号】：S812.2

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