【摘要】 在准噶尔盆地西北缘古玛纳斯湖湖积平原区,通过引水灌溉进行规模土地开发中,利用紫花苜蓿作为先锋植物对新垦殖土地进行的改良和熟化。建植一年后,明显的改善了土壤理化形状,增加了水稳性团粒和土壤空隙度;降低了土壤溶重,增强了蓄水能力。通过紫花苜蓿繁茂发达的根系和多次刈割改良了盐碱地,降低了土壤的pH值,提高了土壤有机质;同时,利用紫花苜蓿特性接种根瘤菌使其产生强大的固氮作用,这是长期改良土壤、培肥地力并进尽快产生经济效益最重要的有效手段之一。更多还原

【Abstract】 A study to use alfalfa as pioneer plant to improve virgin soil at North-West Junggar Basin was carried out. The results showed that both physics and chemistry characters of the soil were changed greatly. The soil aggregate structure apparently improved, soil porosity and organic matter as well as soil water holding capacity were all increased greatly, soil PH value decreased greatly. It was concluded that planting alfalfa at desert area with infertile soil has profound effects in terms of ecological and economical returns.更多还原