辽西北地区典型农林复合模式下土壤特性研究

通过对辽西北地区4种典型农林复合模式对土壤改良的研究,结果显示,相对于对照原始荒地,农林复合模式具有降低土壤容重,增加土壤持水量、土壤孔隙度等作用,同时改善土壤肥力,增大土壤内氮、磷、钾含量,提升有机质含量。土壤质量综合评价显示,农林复合模式中大扁杏-花生-玉米对土壤的改良效果最好,大扁杏-麻黄草、樟子松-花生次之。在土层深度上,大扁杏-花生-玉米模式和大扁杏-麻黄草模式对0～20cm土层的土壤改良效果好于20～40cm;樟子松-花生模式结果与之相反。

Soil Characteristics Under Typical Agroforestry Model in Northwestern Areas

Research of four typical agroforestry models on soil improvement in northwestern areas was conducted .Re-sult shows that ：relative to the control primitive wasteland ,agroforestry model have characteristics of reducing soil bulk density ,increasing soil water holding capacity ,soil porosity and so on ,while improving soil fertility ,increasing the soil nitrogen ,phosphorus ,potassium content ,improving organic matter content .Comprehensive evaluation of soil quality shows that ：in the agroforestry model ,Prunus sibirica var .suavosperma- A rachis hypogaea- Zea mays have the optimal effect on soil improvement ;Prunus sibirica var .suavosperma- Ephedra sinica ,followed by Pinus sylvestris var .mongolica- Arachis hypogaea .On soil depth ,the soil improvement effect of model for Prunus sibirica var .suavosperma - A rachis hypogaea- Zea mays and the model of Prunus sibirica var .suavosperma-Ephedra sinica in 0-20 cm soil layer are optimal than that in 20-40 cm soil layer ;the result of the model for Pinus sylvestris- A rachis hypogaea is opposite .