植被恢复对亚热带退化红壤区土壤化学性质与微生物群落的影响

应用生态学报

植被恢复对亚热带退化红壤区土壤化学性质与微生物群落的影响

龚霞¹,牛德奎²,赵晓蕊¹,鲁顺保³,刘苑秋²,魏晓华⁴,郭晓敏^2**

(¹江西农业大学理学院, 南昌 330045; ²江西农业大学园林与艺术学院, 南昌 330045; ³江西师范大学生命科学学院, 南昌 330022; ^4不列颠哥伦比亚大学奥提根分校,加拿大不列颠哥伦比亚省基洛纳 V1V 1V7)

出版日期:2013-04-18 发布日期:2013-04-18

Effects of reforestation on soil chemical properties and microbial communities in a severely degraded sub-tropical red soil region.

GONG Xia¹, NIU De-kui², ZHAO Xiao-rui¹, LU Sun-bao³, LIU Yuan-qiu², WEI Xiao-hua⁴, GUO Xiao-min²

(¹College of Science, Jiangxi Agricultural University, Nanchang 330045, China; ^2College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045, China; ^3College of Life Science, Jiangxi Normal University, Nanchang 330022, China; ^4University of British Columbia (Okanagan Campus), Kelowna V1V 1V7, British Columbia, Canada)

Online:2013-04-18 Published:2013-04-18

摘要/Abstract

摘要： 利用1991年在江西省泰和县严重退化的丘陵红壤区建立的长期森林恢复实验基地,以自然恢复的荒草地为对照,分析了湿地松纯林、枫香纯林、湿地松-枫香混交林3种植被类型造林19年后土壤养分和微生物群落数量的变化.结果表明: 枫香纯林和湿地松-枫香混交林的土壤有机碳含量(15.16±3.53和16.42±0.49 g·kg^-1)显著高于荒草地(9.30±1.13 g·kg^-1);土壤全磷含量表现为荒草地(0.30±0.02 g·kg^-1)＞湿地松-枫香混交林(0.22±0.04 g·kg^-1)＞枫香纯林(0.14±0.01 g·kg^-1);土壤有效磷含量为枫香纯林(1.66±0.02 mg·kg^-1)、湿地松-枫香混交林(2.47±0.27 mg·kg^-1)和湿地松纯林(1.15±0.71 mg·kg^-1)显著高于荒草地(0.01±0.00 mg·kg^-1);土壤的微生物总数、细菌数量及百分比、土壤无机解磷菌和有机解磷菌数量均为枫香纯林、湿地松-枫香混交林显著高于湿地松纯林和荒草地;真菌数量及百分比、放线菌百分比为枫香纯林、湿地松-枫香混交林显著低于荒草地;土壤有机碳含量与细菌百分比呈极显著正相关,与真菌和放线菌百分比呈显著负相关;土壤有效磷与有机解磷菌数量呈显著正相关,与无机解磷菌数量不相关.枫香纯林和湿地松-枫香混交林可以作为亚热带退化红壤区植被恢复的推荐模式.

Abstract: Taking the long-term reforestation experimental base established in a severely degraded sub-tropical hilly red soil region in Taihe County of Jiangxi Province in 1991 as the object, this paper studied the changes of soil nutrients and microbial communities after 19 years reforestation of Pinus elliottii forest, Liquidambar formosana forest, and P. elliotti-L. formosana forest, with the naturally restored grassland as the control. The soil organic carbon content in the L. formosana and P. elliottii-L. formosana forests (15.16±3.53 and 16.42±0.49 g·kg^-1, respectively) was significantly higher than that in the control (9.30±1.13 g·kg^-1), the soil total phosphorus content was in the order of the control (0.30±0.02 g·kg^-1) > P. elliottii-L. formosana forest (0.22±0.04 g·kg^-1) > L. formosana forest (0.14±0.01 g·kg^-1), while the soil available phosphorus content was 1.66±0.02 mg·kg^-1 in L. formosana forest, 2.47±0.27 mg·kg^-1 in P. elliottii-L. formosana forest, and 1.15±0.71 mg·kg^-1 in P. elliottii forest, being significantly higher than that in the control (0.01±0.00 mg·kg^-1). The total amounts of soil microbes, the amount and percentage of soil bacteria, and the amount of inorganic and organic phosphatesolubilizing microbes in L. formosana forest and P. elliottii-L. formosana forest were all significantly higher than those in P. elliottii forest and the control, while the amount and percentage of soil fungi and the percentage of soil actinomycetes in L. formosana forest and P. elliottii-L. formosana forest were significantly lower than those in the control. The soil organic carbon content was significantly positively correlated with the percentage of soil bactera, but negatively correlated with the percentage of soil fungi and actinomycetes, while the soil available phosphorus content was significantly positively correlated with the amount of organic phosphatesolubilizing microes, but not with the amount of inorganic phosphate-solubilizing microbes. It was suggested that L. formosana forest and P. elliottii-L. formosana forest could be the recommended reforestation models in sub-tropical degraded red soil region.

龚霞1,牛德奎2,赵晓蕊1,鲁顺保3,刘苑秋2,魏晓华4,郭晓敏2**. 植被恢复对亚热带退化红壤区土壤化学性质与微生物群落的影响[J]. 应用生态学报.

GONG Xia1, NIU De-kui2, ZHAO Xiao-rui1, LU Sun-bao3, LIU Yuan-qiu2, WEI Xiao-hua4, GUO Xiao-min2. Effects of reforestation on soil chemical properties and microbial communities in a severely degraded sub-tropical red soil region.[J]. Chinese Journal of Applied Ecology.