文献类型：期刊文献

中文题名：长期生草对柑橘园土壤化学及生物学性质的影响

英文题名：Effects of long?term living grass mulching on soil chemical and biological properties in different soil layers of a citrus orchard

作者：王娜[1] 李乐[2] 勾蒙蒙[1,3] 简尊吉[1] 胡建文[1] 陈会玲[1] 肖文发[1,3] 刘常富[1,3]

第一作者：王娜

机构：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091;[2]中国林业科学研究院热带林业研究所,广州510520;[3]南京林业大学南方现代林业协同创新中心,南京210037

年份：2023

卷号：43

期号：14

起止页码：5890-5901

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金面上项目(32172671);国家自然科学基金重点项目(32130074)。

语种：中文

中文关键词：长期生草;土壤微生物生物量;土壤酶活性;土层;柑橘园

外文关键词：long?term living grass mulching;soil microbial biomass;soil enzyme activity;soil layer;citrus orchard

分类号：S66

摘要：以柑橘园清耕、自然生草和人工生草3种管理模式为研究对象,对其土壤化学及生物学性质进行测定,探明了长期生草对柑橘园不同土层土壤碳氮磷、微生物生物量碳氮磷、酶活性的影响及其相互关系。结果表明:生草类型和土层显著影响土壤碳氮磷养分含量、微生物生物量碳氮磷含量和相应的酶活性,但两者互作仅对β?葡萄糖苷酶、N?乙酰氨基葡萄糖苷酶和亮氨基酸氨基肽酶有显著影响(P<0.05)。总体上,土壤生物化学性质在生草类型间表现为人工生草>自然生草>清耕;在土层间表现为0—10 cm>10—20 cm>20—40 cm。冗余分析表明,前两轴土壤化学及生物学指标解释了80.2%土壤酶活性的变化,且主要表现为正效应。土壤化学及生物学指标对土壤酶活性的影响也因生草类型和土层而异,人工生草在各土层中对β?葡萄糖苷酶、纤维二糖水解酶、多酚氧化酶、N?乙酰氨基葡萄糖苷酶、亮氨基酸氨基肽酶和酸性磷酸酶6种土壤碳氮磷酶活性的影响均为正效应,而自然生草仅在0—20 cm土层中对β?葡萄糖苷酶和纤维二糖水解酶活性产生正效应,两种生草类型土壤酶活性均在0—10 cm土层受土壤碳氮磷等因子影响最为突出。因此,相比于清耕,人工和自然生草覆盖能显著提高柑橘园土壤碳氮磷养分含量、微生物生物量碳氮磷含量和相应的酶活性,其促进作用随土层加深而降低,且人工生草的改善作用强于自然生草。
In this study,three management practices,including clean tillage,natural grass mulching,and cultivated grass mulching,were identified as the research objects.The effects of long?term living grass mulching on the carbon(C),nitrogen(N),and phosphorus(P)contents of soil and microbial biomass and the soil enzyme activities in different soil layers in a citrus orchard as well as the correlations of these indicators were investigated by measuring the chemical and biological properties of soil.The results showed that grass types and soil layers had significant effects on the C,N and P contents of soil and microbial biomass and the corresponding enzyme activities.However,their interactions only showed significant effects onβ?glucosidase,N?acetylglucosaminidase and leucine aminopeptidase(P<0.05).In general,the biochemical properties of soil were ranked in descending order in terms of grass types and soil layers:cultivated grass mulching>natural grass mulching>clean tillage among different grass types,and 0—10 cm>10—20 cm>20—40 cm among soil layers.The redundancy analysis results showed that the chemical and biological indices of soil in the first two axes accounted for 80.2%of the changes in soil enzyme activities and mainly showed positive effects.The effects of the chemical and biological indices of soil on enzyme activities varied with grass types and soil layers.The cultivated grass mulching showed positive effects on the activities ofβ?glucosidase,cellobiohydrolase,phenol oxidase,N?acetylglucosaminidase,leucine aminopeptidase and acid phosphatase in each soil layer.The natural grass mulching only had positive effects onβ?glucosidase and cellobiohydrolase activities in the 0—20 cm soil layer.Soil enzyme activities of these two grass types were most significantly affected by the C,N and P contents of soil in the 0—10 cm soil layer.Therefore,compared with clean tillage,the cultivated and natural grass mulching significantly increased the C,N and P contents of soil and microbial biomass and the corresponding enzyme activities.However,their promotion effects on the C,N and P decreased with the increase in the soil depth.Particularly,the promotion effect of the cultivated grass on the C,N and P was larger than that of natural grass.