黄土高原丘陵沟壑区经济作物欧李的水土保持功能
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山西省科技重大专项“经济型灌木(钙果)在山西生态脆弱区、工矿区生态恢复重建中的应用研究与示范”(20121101010)


Soil and Water Conservation Function of Cerasus Humilis inHilly-gully Region of Loess Plateau
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    摘要:

    [目的] 研究经济作物欧李在黄土高原丘陵沟壑区的水土保持功能,为当地推广欧李种植提供理论支撑。[方法] 以山西省吕梁市柳林县4类试样样地为对象,对欧李种植区土壤持水性、团聚体水稳定性及抗蚀性进行研究。[结果] (1)欧李种植区土壤容重明显低于其他样地土壤,其中阳坡欧李Ⅲ号区土壤容重最低,表层和亚表层分别为0.954,1.163 g/cm3,容重与总孔隙度、毛管孔隙度呈极显著负相关。(2)欧李在黄土高原丘陵沟壑区适应性极强,通过种植可以显著改善土壤肥力。(3)欧李样地土壤>0.25 mm风干及水稳性团聚体、土壤团聚体平均重量直径及团聚体水稳性指数均远高于该地区传统水土保持植物样地和撂荒地样地的土壤,并且团聚体破坏率最低。(4)欧李样地土壤0-40 cm土层平均可蚀性因子K值最低,对表层及亚表层土壤保护效果更好。(5)K值与黏粒和有机质含量呈极显著负相关,与粉粒含量呈极显著正相关,土壤质地决定土壤抗蚀性能。[结论] 欧李在黄土高原丘陵沟壑区具有很好的适应性,不仅可以增加农民收入,更对提高当地水土保持能力,改善生态环境具有重要意义。

    Abstract:

    [Objective] We aimed to study the soil and water conservation function of Cerasus humilis, in order to provide theoretical support for C. humilis local planting.[Methods] The water retention, water stability of soil aggregates, soil anti-erodibility of C. humilis in 4 different plots were examined in Liulin County, Shanxi Province, China.[Results] (1) The soil bulk density of C. humilis was significantly lower than other soil samples, and soil bulk density of C. humilis Ⅲ in sunny slope was the lowest(0.954 g/cm3 in surface, 1.163 g/cm3 in subsurface). It showed a significant negative correlation with soil total porosity and capillary porosity. (2) C. humilis displayed strong adaptability to the local conditions, and this was beneficial to improving soil fertility. (3) The soil aggregates and water-stable aggregates(>0.25 mm), the wet-sieving mean weight diameters(MWD) and soil aggregate water-stability index in C. humilis plantation were much higher than other plots, and it had the lowest soil aggregate breakage rate. (4) The average soil erodibility factor(K) values of 0-40 cm soil layer was the lowest in C. humilis plantation, which was effective to prevent soil erosion in surface and subsurface. (5) The value of K showed a significant negative correlation with clay and organic matter, while a significant positive correlation with silt. Soil texture determined soil erodibility.[Conclusion] C. humilis has a strong adaptability in hill-gully region of the Loess Plateau, which not only increase the income of farmers, but also improve the local soil and water conservation capacity and environment.

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董晓辉,刘林,李金峰,杜俊杰,王鹏飞,张建成.黄土高原丘陵沟壑区经济作物欧李的水土保持功能[J].水土保持通报,2016,36(5):242-247

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  • 收稿日期:2015-11-02
  • 最后修改日期:2015-11-25
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  • 在线发布日期: 2016-11-22
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