基于灰色关联分析的祁连山寺大隆林区典型植被类型土壤质量评价
蒋志成 , 蒋志仁 , 赵维俊 , 廖空太 , 冯金元
甘肃农业大学学报 ›› 2022, Vol. 57 ›› Issue (06) : 177 -187.
基于灰色关联分析的祁连山寺大隆林区典型植被类型土壤质量评价
Soil quality assessment of typical vegetation types in the Sidalong forest region of the Qilian Mountains based on grey correlation analysis
目的 探究祁连山不同植被类型对土壤理化性质的影响。 方法 以祁连山寺大隆林区天涝池流域分布的4种典型植被类型:祁连圆柏林、青海云杉林、灌木林和干草原为研究对象,通过对不同植被类型的调查和土壤取样测定,分析能反映土壤质量的主要物理指标和化学指标在土壤剖面上的变化规律,并用灰色关联分析法评价不同植被类型的土壤质量。 结果 在不同植被同一土层中,土壤容重、总孔隙度、土壤质地(除粘粒40~60 cm土层外)等在0~10 cm差异性不同于10~60 cm土层,而土壤有机碳、水解氮和阳离子交换量等在0~20 cm差异性不同于30~60 cm土层,这些指标在30~60 cm土层的差异性均为一致;土壤质量含水量在不同土层差异性均为一致;土壤速效磷在不同土层中的变化规律不明显。在同一植被不同土层中,除干草原土壤速效钾随土层深度增加其含量呈先增后减的趋势外,土壤容重、粉类和粘粒均随土层深度增加其含量不断增加,而土壤质量含水量、总孔隙度和砂粒及有机碳、水解氮、速效磷、速效钾、电导率、阳离子交换量均随土层深度增加其含量不断减小,但不同土层间的差异显著性各不相同。不同植被类型0~60 cm土壤剖面深度的关联度数值大小表现为:青海云杉林(0.759 4)>灌木林(0.742 6)>祁连圆柏林(0.696 4)>干草原(0.694 5)。 结论 4种典型植被类型中,土壤质量最好的植被类型为青海云杉林,其次为灌木林,然后是祁连圆柏林,干草原最差。该研究结果可为分类经营管理祁连山不同植被类型提供理论参考。
Objective The effects of different vegetation types on the physical and chemical properties of the soil in the Qilian Mountains were investigated. Method Four typical vegetation types were studied in Tianlaochi Basin of Sidalong Forest,which lived in Qilian Mountain.Through the vegetation survey and soil sampling of different vegetation types,the changes of major physical indices and chemical indices reflecting the soil quality in the soil profile were analyzed,and the soil quality of different vegetation types was evaluated by grey correlation analysis. Result In the same soil layer with different vegetation,the differences of soil bulk density,total porosity and soil texture (except clay soil layer 40~60 cm) in 0~10 cm were different from 10~60cm soil layers,while the differences of soil organic carbon,hydrolyzed nitrogen and cation exchange capacity in 0~20 cm were different from 30~60 cm soil layers.The differences of these indices in 30~60 cm soil layers were consistent.The difference of soil mass water content in different soil layers was consistent.The variation of soil available phosphorus in different soil layers was not obvious.In different soil layers of the same vegetation,the content of soil available K in dry steppe first increased and then decreased with increasing soil depth.Soil bulk density,powder and clay with the increase of soil depth size increasing,but mass soil moisture content,total porosity and sand grain and hydrolysis of organic carbon,nitrogen,available phosphorus and available potassium,electrical conductivity,cation exchange capacity are size and decreases with the increase of soil depth its content,but the difference between different soil layer significantly different.The correlation values of 0~60 cm soil profile depth of different vegetation types were as follows: Picea crassifolia forest (0.759 4) > shrubbery (0.742 6) > Sabina przewalskii forest (0.696 4)>steppe (0.694 5). Conclusion Among the four typical vegetation types,the vegetation type with the best soil quality was Picea crassifolia forest,followed by scrub,then Sabina przewalskii forest,and the steppe was the worst.The results can provide theoretical basis for classification management of different vegetation types in the Qilian Mountains..
寺大隆林区 / 植被类型 / 土壤理化性质 / 灰色关联分析
sidalong forest region / vegetation types / soil physical and chemical properties / grey correlation analysis
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