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通过对干旱区湿地-艾比湖湿地土壤有机质、碱解氮、速效磷、速效钾等土壤质量指标分析,结果表明:湖区土壤有机质含量呈现出盐化草甸土>盐土>灰棕漠土>风沙土的规律。湿地土壤有机质空间上表现为湖区以东、以西、以南方向上层土壤有机质依次递减,湖区以北上层土壤有机质先递减后递增。湖区以西中层土壤有机质与上层趋势一致,以北有机质含量较大,湖区以东、以南方向有机质含量较小。下层土壤样品中,湖区以西、以北位置均呈现递减趋势,以东方向有机质含量较高,以南较小。盐化草甸土有机质含量自上而下依次递减,趋势明显。盐土、风沙土、灰棕漠土有机质含量上层>中、下层,中下层含量差异较小。土壤中的碱解氮、速效磷、速效钾含量与土壤中有机质含量具有较好的相关性。
Through the analysis of soil quality indicators of soil organic matter, available nitrogen, available phosphorus and available potassium in arid wetlands - Aibi wetland, the results show that the contents of organic matter in the lake show salinized meadow soil> saline soil> gray brown desert soil> Sandy soil law. In the wetland, the organic matter in the soil is characterized by decreasing soil organic matter in the upper layer in the east, west, and south of the lake. Soil organic matter in the upper layer north of the lake area decreases first and then increases. The organic matter of the middle layer in the west of the lake area is consistent with that of the upper layer, and the content of organic matter in the north of the lake area is relatively large. The content of organic matter in the east and south of the lake area is relatively small. In the lower soil samples, the west of the lake and the north of the lake show a decreasing trend, and the content of organic matter is higher in the east and smaller in the south. Saline meadow soil organic matter content decreased from top to bottom, the trend is obvious. Saline soil, aeolian sandy soil, gray brown desert soil organic matter content of the upper> middle, lower, middle and lower levels of the difference is small. Soil available nitrogen, available phosphorus, available potassium content and soil organic matter content has a good correlation.