沙地樟子松人工林土壤酶活性及其影响因子

摘要/Abstract

摘要： 采用通径分析的方法对辽宁省章古台地区10~60 a沙地樟子松人工林的多种土壤理化因子与5种土壤酶活性进行分析。结果表明：5种土壤酶活性与多数土壤理化因子相关性显著，土壤酶活性能够表征该区域土壤综合肥力状况。不同土壤酶活性主要影响因子不同，蔗糖酶主要影响因子综合作用排序为：有机质>黏粒>速效磷>pH；蛋白酶主要影响因子综合作用排序为：碱解氮>速效钾>含水率；磷酸酶主要影响因子综合作用排序为：全磷>速效钾>粉粒；过氧化氢酶主要影响因子综合作用排序为：pH>容重>全磷>全钾；脲酶主要影响因子综合作用排序为：pH>黏粒>全氮>含水率。与简单相关分析相比，通径分析方法能更深入地了解土壤酶活性和土壤理化因子的关系，期望通过对土壤酶活性主要影响因子的研究为樟子松人工林的抚育和土壤改良提供依据。

关键词: 樟子松, 人工林, 土壤酶, 酶活性, 影响因子, 通径分析, 辽宁

Abstract: The path analysis was used to analyze the soil physicochemical factors and 5 kinds of soil enzyme activities under the Pinus sylvestris var. mongolica plantation with 10-60 year stand ages in the Zhanggutai area of Liaoning Province. The results showed that the 5 kinds of soil enzyme activities in the study area were significantly correlated with most soil physicochemical factors, so the soil enzyme activities could be used to characterize the comprehensive soil fertility in this region. The main factors affecting the different soil enzyme activities were different, and the main factors affecting the sucrose enzyme were the contents of organic matter, clay and available phosphorus as well as pH value. The main factors affecting the protease were the contents of alkali-hydrolyzed nitrogen, available potassium and soil moisture. The main factors affecting the phosphatase were the contents of total phosphorus, available potassium and powder. The main factors affecting the catalase were the pH value, bulk density and contents of total phosphorus and total potassium. The main factors affecting the urease were the pH value and the contents of clay, total nitrogen and soil moisture. Compared with the simple correlation analysis, the path analysis could be used to better understand the relationship between soil enzyme activity and soil physicochemical factors. It is expected to provide a basis for soil improvement under Pinus sylvestris var. mongolica plantation through studying the main factors affecting soil enzyme activity.

Key words: Pinus sylvestris var. mongolica, plantation, soil enzyme, enzyme activity, affecting factor, path analysis, Liaoning Province

于德良, 雷泽勇, 张岩松, 于东伟, 周晏平, 姜吉文.

沙地樟子松人工林土壤酶活性及其影响因子 [J]. 干旱区研究, 2019, 36(3): 621-629.

YU De-liang, LEI Ze-yong, ZHANG Yan-song, YU Dong-wei, ZHOU Yan-ping, JIANG Ji-wen. Soil Enzyme Activity and Its Affecting Factors under Pinus sylvestris var. mongolica Plantation in Sandy Land[J]. Arid Zone Research, 2019, 36(3): 621-629.

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