...土壤干燥化；草粮轮作；水分恢复 [gap=2018]Key words: Loess Plateau; semi-humid area; alfalfa (Medicago sativa L.); soil desiccation; alfalfa-grain crop rotation; soil ..
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【Key words】 loess hilly and gully region; soil water environment; soil reservoir; soil desiccation; feedback of vegetation growth
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The soil desiccation has become seriously potential danger of the construction of artificial vegetation in tills region.
土壤干化已成为这一地区人工植被建设的严重隐患。
Due to its strong consumption of soil water, soil desiccation and grassland degradation happened quite frequently at this zone.
苜蓿具有强烈的耗水性能，导致半湿润区苜蓿草地发生干燥化，草地退化较为严重。
Compared to Guyuan, spring wheat yield at Yulin and Haiyuan was lower, yield fluctuation was stronger and soil desiccation rate was faster.
与固原相比，榆林和海原连作春小麦产量较低，产量波动性较大，春小麦田干燥化进程较快。
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