银川平原芦苇湿地土壤含水量及土壤生源要素垂直分布特征

发布时间：2018-08-05 15:09

【摘要】：以银川平原芦苇湿地作为研究对象,对其土壤含水量、pH、全盐含量、有机质含量、全N、有效N、全P、速效P等生源要素的垂直分布进行了初步研究。结果表明,在0~50cm的土层,土壤含水量、土壤全盐、有机质含量、土壤全N及碱解N含量变化规律比较相似,由表层到深层,整体表现为由高变低,在0~40cm表现为急剧下降,在40~50cm又有所升高,0~10cm土层含量高即表现出明显的表聚性;有效P与其他各项要素的相关关系均较差且不显著,有效P具有不同于其他要素的独特垂直分布规律;相关分析表明,不同土层中土壤含水量、有机质、全N与碱解N之间具有良好的正相关性,说明之间具有相似的空间分布规律;pH规律不明显且与其他所有生源要素(有效P除外)均呈极显著的负相关关系,在pH较高的碱性土壤环境会抑制植物其他生源要素利用;有机质与全N、碱解N和全P呈现显著正相关关系,银川平原芦苇湿地土壤中有机质、N素、P素的主要来自于内源沉积物、枯落物及动植物残体降解释放而来,也表明了湿地具有强大的"源"与"汇"的功能。
[Abstract]:The vertical distribution of soil water content (pH), total salt content, organic matter content, total N, available N, total P and available P in Reed wetland in Yinchuan Plain were studied. The results showed that in 0~50cm soil layer, soil water content, soil total salt, organic matter content, soil total N and alkali-hydrolyzed N content were similar, from surface to deep layer, the overall performance was from high to low, and decreased sharply in 0~40cm. The correlation between available P and other elements is not significant and the correlation between available P and other elements is not significant. The correlation analysis shows that the correlation between available P and other elements is different from that of other elements, and the correlation analysis shows that the correlation between available P and other elements is different from that of other elements. Soil water content, organic matter, total N and alkali-hydrolyzed N in different soil layers were positively correlated with each other. The results showed that there was a similar spatial distribution law and the pH law was not obvious and had a significant negative correlation with all other biotic elements (except available P). In the alkaline soil environment with high pH value, the utilization of other biogenic elements of plants would be inhibited. Organic matter was positively correlated with total N, alkali-hydrolyzed N and total P. The organic matter N and P in Reed wetland soil in Yinchuan Plain were mainly derived from the degradation and release of endogenous sediments, litter and animal and plant residues. It also shows that wetland has powerful functions of "source" and "sink".
【作者单位】：湖北医药学院基础医学院;宁夏大学西北退化生态系统恢复与重建教育部重点实验室;
【基金】：国家自然科学基金项目(41361095)
【分类号】：S151.9

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