半干旱矿区作物对土壤含水率和圆锥指数的影响

[目的]研究半干旱矿区不同作物在不同阶段对土壤含水率和土壤圆锥指数的影响.[方法]在对同一块耕地进行均匀施肥、统一耕作以及灌溉后,划分4个区域,分别种植黄豆、玉米、大豆、绿豆4种作物.分别于作物收割前22 d、作物收割前1 d以及收割后33 d对4种农作物种植区的土壤进行土壤圆锥指数和土壤质量含水率的测定,研究同一作物在不同阶段对土壤圆锥指数和土壤质量含水率的影响,以及不同作物同一阶段对土壤圆锥指数和土壤质量含水率的影响.[结果]种植作物可以增加土壤表层的土壤质量含水率,同时降低土壤圆锥指数;不同作物对土壤圆锥指数和土壤质量含水率的影响程度存在一定差异;线性模型能够较好地表征土壤质量含水率与土壤圆锥指数的定量化关系.[结论] 该研究为半干旱矿区土壤环境治理和土地复垦提供理论依据和实际应用价值.

Effects of Crops on Soil Water Content and Soil Cone Index in Western Arid Area

[Objective] To study the effect of different crops on soil cone index and soil water content in different times.[Method]Unified fertilization,cultivation and irrigation were conducted in a cultivated field.Then this field was divided into four sections which were cultivated with yellow bean,corn,soybean and green bean,respectively.22 days,1day before and 33 days after the crops were harvested,soil cone index and soil water content were determined in the four cultivated sections.Based on the analysis of variation for soil cone index and soil water content with different crops or different periods,the effect of crop on soil cone index and soil water content was studied.[Result]Crops could increase soil water content and decrease soil cone index at the soil surface;Effects of different crops on soil cone index and soil water content were various.The linear regression model for the relationship between soil water content and soil cone index was valid,considering the complex situation in the field experiment.[Conclusion] The study provides theoretical basis and practical application value for soil environmental governance and semi-arid mining area land reclamation.