不同形成时间高原鼢鼠鼠丘土壤养分分配规律

发布时间：2018-04-11 14:00

本文选题：高原鼢鼠 + 鼠丘　；参考：《生态学报》2016年07期

【摘要】：高原鼢鼠(Myospalax baileyi)作为青藏高原唯一营地下生活的鼠类,其造丘活动不仅能影响草地群落演替的方向和进程,而且对鼠丘土壤养分含量和分配造成空间异质性。关于不同形成时期的高原鼢鼠鼠丘养分含量及在垂直高度的分配规律研究报道尚少。基于此本研究以不同形成时期的鼢鼠鼠丘为研究对象,对鼠丘土壤养分含量及空间分配规律进行探讨。结果表明:随着鼠丘形成时间的推移,土壤养分总体表现为:1年鼠丘多年鼠丘对照区;与非鼠丘区相比,随着土壤土层增加,土壤养分未呈现规律性的变化。其中,土壤全氮和速效氮含量表现为1年鼠丘3年鼠丘5年鼠丘对照区;0—10cm土壤全磷和速效磷含量变化总体表现为多年鼠丘1年鼠丘对照区,10—30cm土层1年鼠丘土壤中全磷和速效磷含量最高。土壤速效钾和有机质含量随着鼠丘形成时间推移总体表现为:1年鼠丘5年鼠丘3年鼠丘;其中在10—30cm土层,1年鼠丘速效钾和有机质含量显著高于多年鼠丘和对照区。由此可见,高原鼢鼠造丘活动能显著改变土壤养分分配格局,短期内形成养分富集的肥力岛,为鼠丘土壤种子库中种子的萌发和植被生长提供必需的养分保证。
[Abstract]:Myospalax Baileyi), as the only living rodent in Qinghai-Tibet Plateau, can not only affect the direction and process of grassland community succession, but also cause spatial heterogeneity to soil nutrient content and distribution.There are few reports on nutrient content and distribution at vertical height of plateau zokor mounds at different forming stages.Based on this study, the soil nutrient content and spatial distribution of zokor mounds in different forming periods were studied.The results showed that with the development of mouse mound, the soil nutrient showed as follows: 1 year rat mound control area, and no regular change of soil nutrient with the increase of soil layer compared with non-mouse mound area.Of which,The contents of total nitrogen and available nitrogen in the soil were 1 year mound 3 years and 5 years mound control area 0 10 cm soil total phosphorus and available phosphorus content change as a whole for many years mound 1 year rat mound control area 10-30 cm soil layer 1 year mound soilThe contents of total phosphorus and available phosphorus were the highest.The contents of available potassium and organic matter in soil with the formation time of mouse mound were as follows: 1 year mound 5 years mound 3 mound; in 10-30cm soil layer the content of available K and organic matter in 1 year mound was significantly higher than that in many years mound and control area.It can be seen that the mound making activities of plateau zokor can significantly change the distribution pattern of soil nutrients and form nutrient enriched fertility islands in short time which can provide the necessary nutrient guarantee for seed germination and vegetation growth in the soil seed bank of the mound of the plateau zokor.
【作者单位】：青海省畜牧兽医科学院;青海省河南县草原专业综合队;
【基金】：公益性行业(农业)科研专项经费项目(201203041)
【分类号】：S812

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