Effects of Wheat and Rapeseed Production on Soil Water Storage in Mongolian Rangeland
Effects of Wheat and Rapeseed Production on Soil Water Storage in Mongolian Rangeland
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DOI：
10.3390/agriculture11090888
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发表时间：
2021-09
期刊：
影响因子：
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通讯作者：
Katori Miyasaka;T. Miyasaka;Jumpei Ota;Siilegmaa Batsukh;U. Jamsran
中科院分区：
文献类型：
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作者：
Katori Miyasaka;T. Miyasaka;Jumpei Ota;Siilegmaa Batsukh;U. Jamsran
近年来，蒙古不仅出现了长期存在的小麦田，而且油菜田也有所增加。这导致人们越来越担心由于不适当的耕作而造成的土壤退化。本研究旨在确定油菜生产对蒙古国土壤蓄水量的影响。通过连续5年（包括作物生产年和休闲年）对小麦、油菜田和邻近草原草地土壤水分和基质势的测定，比较了不同作物生产年和休闲年的土壤贮水量。结果表明，油菜田和两种草地根区以下的基质势均比凋萎点干燥，而小麦田的基质势通常与凋萎点相当或比凋萎点湿润。休耕年土壤贮水量与邻近草地相比，麦田高5-10%，油菜地几乎相等。田间管理必须考虑到油菜田比小麦田需要更多的水，而在休耕期间储存的水较少。
In recent years, Mongolia has witnessed an increase in not only wheat fields, which have been present for a long time, but also rapeseed fields. This has led to increasing concerns about soil degradation due to inappropriate cultivation. This study aims to determine the impacts of rapeseed production on soil water storage in Mongolia. The soil water content and matric potential were measured in wheat and rapeseed fields and adjacent steppe rangeland for five years, including crop production and fallow years, and the soil water storages in the fields were compared. The results demonstrated that the matric potential below the root zone in the rapeseed field and both rangelands was drier than the wilting point, whereas the potential in the wheat field was usually almost the same or wetter than this point. The comparison of the amount of soil water storage during the fallow year with that of the adjacent rangeland showed it to be 5–10% higher for the wheat field and almost equal for the rapeseed field. Field management must consider the fact that rapeseed fields use more water than is required by wheat fields and that less water is stored during fallow periods.