南亚热带人工林种植对赤红壤团聚体分布及稳定性的影响

doi:10.13287/j.1001-9332.202011.009

应用生态学报 ›› 2020, Vol. 31 ›› Issue (11): 3647-3656.doi: 10.13287/j.1001-9332.202011.009

南亚热带人工林种植对赤红壤团聚体分布及稳定性的影响

林立文¹, 邓羽松^1*, 王金悦¹, 杨钙仁¹, 蒋代华², 王玲³

¹广西大学林学院, 南宁 530004;
²广西大学农学院, 南宁 530004;
³华中农业大学资源与环境学院, 武汉 430070

收稿日期:2020-05-19 接受日期:2020-09-03 出版日期:2020-11-15 发布日期:2021-06-10
通讯作者: * E-mail: denny2018@gxu.edu.cn
作者简介:林立文, 男, 1996年生, 硕士研究生。主要从事森林生态学研究。E-mail: linliwen2018@163.com
基金资助:
广西科技基地和人才专项(桂科AD17195098)、广西科技重大专项(桂科AA17204078-2)和国家重点研发计划项目(2017YFC0505402)资助

Effects of plantation on aggregate distribution and stability of lateritic red soil in south subtropical China

LIN Li-wen¹, DENG Yu-song^1*, WANG Jin-yue¹, YANG Gai-ren¹, JIANG Dai-hua², WANG Ling³

¹College of Forestry, Guangxi University, Nanning 530004, China;
²College of Agriculture, Guangxi University, Nanning 530004, China;
³College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China

Received:2020-05-19 Accepted:2020-09-03 Online:2020-11-15 Published:2021-06-10
Contact: * E-mail: denny2018@gxu.edu.cn
Supported by:
the Guangxi Science and Technology Talent Base (Guike AD17195098), the Major Scientific and Technological Projects in Guangxi (Guike AA17204078-2), and the National Key R&D Program of China (2017YFC0505402).

摘要/Abstract

摘要： 本文选取南亚热带地区桉树、杉木、马尾松、米老排和红锥5种典型人工林为研究对象,采用Elliott湿筛法和Le Bissonnais(LB)法研究了人工林对土壤团聚体稳定性的影响。结果表明: 5种人工林土壤经湿筛法处理后,水稳性团聚体(WR_>0.25)均在62.2%以上,团聚体平均重量直径(MWD)和几何平均直径(GMD)分别介于1.58～3.71和0.57～2.02 mm,表现为杉木林最大,桉树林最小。各林分土壤团聚体结构破坏率(PAD)介于4.6%～31.5%之间;采用转移矩阵法评价5种人工林土壤团聚体,得出土壤团聚体稳定性指数(ASI)为杉木林>红锥林>米老排林>马尾松林>桉树林。在LB法3种处理下,快速湿润处理(FW)对土壤团聚体的破坏程度最大,说明消散作用是研究区团粒崩解的主要机制;预湿润振荡处理(WS)的破坏程度最小;慢速湿润处理(SW)介于两者之间,MWD和GMD值变化一致,均表现为WS>SW>FW,且随土层的加深,呈现逐渐降低的趋势。5种人工林土壤在LB法FW处理下团聚体GMD值与湿筛法ASI、MWD、GMD均达到显著正相关,表明湿筛法与LB法的FW处理具有很好的相关性,可用于表征南亚热带赤红壤地区土壤团聚体的稳定性。综合MWD、GMD、PAD和ASI等团聚体稳定性指标,杉木人工林比其他4种人工林更有助于土壤团聚水平的提高,其土壤结构相对较为稳定。

关键词: 人工林, 土壤团聚体, 南亚热带

Abstract: We examined the stability of soil aggregates in five typical plantations, i.e., Eucalyptus urophylla × E. grandis plantation, Cunninghamia lanceolata plantation, Pinus massoniana plantation, Mytilaria laosensis plantation and Castanopsis hystrix plantation, in the south subtropical China by the Elliott wet sieving and Le Bissonnais (LB) methods. The results showed that the content of water stability aggregate (WR_>0.25) was more than 62.2% after wet sieving. The mean weight diameter (MWD) and geometric mean diameter (GMD) of aggregates were 1.58-3.71 mm and 0.57-2.02 mm, respectively, which were the largest in C. lanceolata plantation and the smallest in E. urophylla × E. grandis plantation. Percentage of aggregate destruction (PAD) of five kinds of plantations ranged from 4.6% to 31.5%. The transfer matrix method was used to evaluate the soil aggregates, with the aggregate stability index (ASI) following the order of C. lanceolata plantation > C. hystrix plantation > M. laosensis plantation > P. massoniana plantation > E. urophylla × E. grandis plantation. Under the three treatments of LB method, the FW treatment was the most destructive to the stability of soil aggregates, indicating that dissipation played a major role in the disintegration of soil aggregates. The WS treatment had the least damage to the aggregates. The effect of slow wetting (SW) treatment was between the fast wetting (FW) and wet stirring (WS). Both the MWD and GMD values followed the order of WS>SW>FW, which gradually decreased with the increases of soil depth. The GMD value of aggregates under FW treatment by LB method of five plantations was significantly positively correlated with ASI, MWD and GMD of wet sieving method, indicating that the traditional wet sieving method had a good correlation with FW treatment and was feasible to determine the stability of soil aggregates in the subtropical red soil. Based on the aggregate stability indices of MWD, GMD, PAD and ASI, C. lanceolata plantation was more conducive to the improvement of soil aggregation level, with more stable soil structure than the other four plantations.

Key words: plantation, soil aggregate, south subtropical zone

林立文, 邓羽松, 王金悦, 杨钙仁, 蒋代华, 王玲. 南亚热带人工林种植对赤红壤团聚体分布及稳定性的影响[J]. 应用生态学报, 2020, 31(11): 3647-3656.

LIN Li-wen, DENG Yu-song, WANG Jin-yue, YANG Gai-ren, JIANG Dai-hua, WANG Ling. Effects of plantation on aggregate distribution and stability of lateritic red soil in south subtropical China[J]. Chinese Journal of Applied Ecology, 2020, 31(11): 3647-3656.

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南亚热带人工林种植对赤红壤团聚体分布及稳定性的影响

Effects of plantation on aggregate distribution and stability of lateritic red soil in south subtropical China

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