围封与放牧对荒漠草原土壤理化性质的影响

发布时间：2018-04-23 19:55

本文选题：围封 + 放牧　；参考：《北方园艺》2017年01期

【摘要】：以宁夏盐池典型荒漠草原为研究对象,选择围栏封育区和围栏外放牧区的芨芨草群落和沙蒿群落,研究围封与放牧区2种群落草地的含水量、pH及土壤理化性质的变化。结果表明:放牧干扰对荒漠草原土壤水分和pH均表现出显著影响(P0.05),沙蒿群落土壤含水量各层在放牧干扰下比围栏区相应高12.0%、12.3%和16.6%,芨芨草群落各层均表现为围封区含水量大于放牧区,放牧区土壤pH明显低于围封区;除速效磷(AP)以外,其它养分元素含量均呈现为围封区大于放牧区,围封内外土壤的有机碳(SOC)、全氮(TN)、速效氮(AN)、速效磷(AP)、速效钾(AK)的达到差异显著水平,对全磷(TP)、全钾(TK)的影响不明显;芨芨草群落各层土壤各指标含量均比沙蒿高,同时相对增幅也大。
[Abstract]:The typical desert steppe in Yanchi, Ningxia, was studied by selecting Achnatherum splendens community and Artemisia artemisia community in fenced and fenced grazing areas. The changes of water content, pH and soil physical and chemical properties of grassland in enclosed and grazing areas were studied. The results showed that grazing disturbance had a significant effect on soil moisture and pH in desert steppe. Soil water content in Artemisia annua community was 12.0% and 16.6% higher than that in fenced area under grazing disturbance. Each layer of Achnatherum splendens community was enclosed. Water content is higher than pastoral area, The soil pH in grazing area was significantly lower than that in enclosed area, except for available phosphorus (APP), the contents of other nutrient elements in enclosed area were higher than those in herding area. The soil organic carbon (SOC), total nitrogen (TNN), available nitrogen (ANN), available phosphorus (APN), available potassium (K) in the enclosed soil reached significant difference level, and the effect on total phosphorus TPN, total potassium TKK) was not obvious, and the content of soil indexes of Achnatherum splendens community was higher than that of Artemisia annua, and the content of soil indexes in each layer of Achnatherum splendens community was higher than that of Artemisia artemisia. At the same time, relative growth is also large.
【作者单位】：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;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地;宁夏大学西部生态与生物资源开发联合研究中心;宁夏大学科学技术处;
【基金】：国家自然科学基金资助项目(31460123,41101301,31260581) 教育部科学技术研究资助项目(413060)
【分类号】：S812

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