| 林下植被不同管理措施培育杉木大径材林分土壤酶活性差异及质量评价 |
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| 引用本文： | 曹光球,费裕翀,路锦,黄樱,郑宏,林开敏,季春杉,曹世江.林下植被不同管理措施培育杉木大径材林分土壤酶活性差异及质量评价[J].林业科学研究,2020,33(3):76-84. |
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| 作者姓名： | 曹光球 费裕翀 路锦 黄樱 郑宏 林开敏 季春杉 曹世江 |
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| 作者单位： | 福建农林大学林学院,福建福州350002;国家林业和草原局杉木工程技术研究中心,福建福州350002;洋口国有林场,福建南平353211 |
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| 基金项目： | 福建省科技厅引导性项目;国家重点研发计划;福建农林大学科技创新专项基金 |
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| 摘 要： | 目的]探讨林下植被不同管理措施对培育杉木大径材林分土壤酶活性及土壤质量的影响。方法]本研究以培育杉木大径材林分为研究对象,分析了林下植被保留(UP)、林下植被去除(UR)和林下套种(IP)3种林下植被管理措施培育杉木大径材林分土壤酶活性差异,并以土壤酶作为土壤生物活性指标,结合土壤物理和化学性质,利用主成分分析法对土壤质量进行综合定量评价。结果]IP处理提高了0~20 cm土层蔗糖酶活性,而20~40、40~60 cm土层3种林下植被管理措施间土壤蔗糖酶活性差异较小;相比于UR和IP处理,UP处理提高了土壤过氧化氢酶活性,脲酶活性则相反,UR和IP处理间土壤脲酶和过氧化氢酶活性差异较小;3种林下植被管理措施下,土壤酸性磷酸酶活性高低排序为IP>UR>UP,多酚氧化酶活性高低排序为UP>IP>UR;林下植被不同管理措施间土壤脲酶、蔗糖酶和多酚氧化酶活性差异较大,其中,多酚氧化酶对于林下植被管理措施的响应更灵敏,且能反映于较深土层;除酸性磷酸酶活性外,其余土壤酶活性均具明显表聚性,且随土层加深而递减。有机质和水解性氮含量与各种土壤酶活性具有极显著或显著正相关;有效磷含量与蔗糖酶、脲酶和酸性磷酸酶活性呈极显著正相关;速效钾含量与蔗糖酶、过氧化氢酶和多酚氧化酶活性呈极显著正相关;土壤物理性质与土壤酶活性相关性较弱。将土壤酶活性作为土壤质量指标之一,结合土壤物理性质和化学性质,通过主成分分析提取出3个主成分,反映了原信息量的75.31%。林下植被不同管理措施的土壤质量指数排序均为:IP>UP>UR。结论]培育杉木大径材林分中,林下套种楠木的林下植被管理措施对于保持和提升土壤质量效果最佳,其次为林下植被保留措施,林下植被去除措施的效果较差。
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| 关 键 词： | 杉木 大径材林分 林下植被管理 土壤酶 土壤质量评价 |
The Differences of Soil Enzyme Activity and Quality Evaluation of Cunninghamia lanceolata Large-diameter Industrial Plantation under Different Understory Vegetation Management Measures |
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| CAO Guang-qiu,FEI Yu-chong,LU Jin,HUANG Ying,ZHENG Hong,LIN Kai-min,JI Chun-shan,CAO Shi-jiang.The Differences of Soil Enzyme Activity and Quality Evaluation of Cunninghamia lanceolata Large-diameter Industrial Plantation under Different Understory Vegetation Management Measures[J].Forest Research,2020,33(3):76-84. |
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| Authors: | CAO Guang-qiu FEI Yu-chong LU Jin HUANG Ying ZHENG Hong LIN Kai-min JI Chun-shan CAO Shi-jiang |
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| Affiliation: | (Forestry College,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Chinese Fir Engineering Technology Research Center,National Forestry and Grassland Administration,Fuzhou 350002,Fujian,China;Yangkou State-owned Forest Farm,Nanping 353211,Fujian,China) |
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| Abstract: | Objective]To study the effects of different understory vegetation management measures on soil enzyme activities and quality in Cunninghamia lanceolata large-diameter industrial plantation.Method]Taking Cunninghamia lanceolata large-diameter industrial plantation as the research object,This study analyzed soil enzyme activities of plantation under three kinds of understory vegetation management measures,i.e.understory vegetation protection(UP),understory vegetation removal(UR)and understory interplanting(IP).The integrated quantitative evaluation on soil quality was made by principle components analysis taking soil enzymes as soil biological activity indexes combining with soil physical and chemical characteristics.Result]The IP increased the sucrase activity in the soils with the depth of 0-20 cm,and there was no obvious difference between the sucrase activity in the soils with the depths of 20-40 and 40~60 cm under these understory vegetation management measures.Compared with UR and IP,the UP showed better effect in increasing soil catalase activity and decreasing soil urease activity,and the soil urease and catalase activity under UR and IP showed no obvious difference.The ranking of soil acid phosphatase activity under the three kinds of understory vegetation management measures was IP>UR>UP,and the ranking of soil polyphenol oxidase activity was UP>IP>UR.The activities of urease,sucrase and polyphenol oxidase in soil under different understory vegetation management measures showed a big difference,and the response of polyphenol oxidase to understory vegetation management measures was more sensitive and was reflected in deeper soil layer.Except acid phosphatase activity,the activities of other soil enzyme showed a obvious property of surface-aggregation,and decreased with the deepening of soil layer.The contents of organic matter and hydrolyzed nitrogen showed extremely significant or significant positive correlation with the activities of the 5 kinds of soil enzyme,the content of available phosphorus showed extremely significant positive correlation with the activities of sucrase,urease and acid phosphatase,and the content of available potassium showed extremely significant positive correlation with the activities of sucrase,catalase and polyphenol oxidase,the activities of soil enzymes were less dependent on the soil physical properties.Soil enzyme activity was taken as one of soil quality indexes,combining with soil physical and chemical characteristics,three principal components were extracted through principal component analysis,reflecting 75.31%of the original information amount.The ranking of soil quality index among different understory vegetation management measures was IP>UP>UR.Conclusion]To sum up,in the large diameter Cunninghamia lanceolata plantation,the effect of planting Phoebe bourmei under the plantation is the best to maintain and improve the soil quality,followed by protecting understory vegetation,and the effect of understory vegetation removal is poor. |
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| Keywords: | Cunninghamia lanceolata large-diameter industrial plantation undergrowth management soil enzyme soil quality evaluation |
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