紫花苜蓿对准噶尔盆地西北缘土质荒漠改良效果研究初报

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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。 In the area of ​​ancient Manas Lake lacustrine plains in the northwestern margin of the Junggar Basin, alfalfa was used as a pioneer plant for the improvement and ripening of newly reclaimed land through the development of large-scale land by irrigation. One year after planting, the physical and chemical shape of the soil was obviously improved, the water-stable aggregates and soil porosity were increased, the soil dissolved weight was reduced, and the water storage capacity was enhanced. Saline-alkali soil was improved by alfalfa flourishing roots and mowing, which reduced the pH of soil and increased soil organic matter. At the same time, the inoculation of Rhizobium with alfalfa could produce strong nitrogen fixation, which was a long-term improvement of soil , One of the most important and effective means of fertilizing soil fertility and bringing economic benefits as soon as possible.
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