摘要
【目的】探究植被恢复模式对退化红壤区土壤理化性质及团聚体稳定性的影响,为中国南方的退化红壤区选择植被恢复模式及土壤结构改良提供依据。【方法】选择江西省泰和县6种植被恢复模式(马尾松纯林、木荷纯林、湿地松纯林、湿地松补植木荷林、马尾松补植木荷林及湿地松木荷混交林)的土壤作为研究对象,比较分析各种植被恢复模式的团聚体粒级分布及稳定性特征。【结果】(1)湿地松纯林在土壤表层的pH值显著小于其它恢复模式(P<0.05),湿地松补植木荷林在土壤表层的有机质含量最高,各恢复模式的土壤表层TN含量显著大于其它土层(P<0.05)。(2)0~10 cm表层土中>2 mm粒级的马尾松补植木荷林水稳性团聚体含量显著高于木荷纯林(P<0.05),马尾松补植木荷林和湿地松木荷混交林的平均重量直径(MWD)和几何平均直径(GMD)显著大于马尾松纯林、湿地松纯林以及木荷纯林(P<0.05),马尾松纯林的破坏率(PAD)大于其它恢复模式。(3)土壤中的水稳性大团聚体含量(WR_(0.25))与破坏率(PAD)、分形维数(D)呈负相关,与团聚体平均直径(MWD、GMD)呈正相关。【结论】通过对6种植被恢复模式的研究比较,结果表明在江西退化红壤区种植混交林对土壤团聚体结构的改善效果比纯林更好,混交林恢复模式比纯林模式更有利于土壤团聚体稳定性的提高。
[Objective]This study aims to explore the effects of vegetation restoration patterns on soil physicochemical properties and aggregate stability in degraded red soil areas,thus providing a basis for the selection of vegetation restoration models and soil structure improvement in degraded red soil areas in southern China[Method]The soils of six vegetation restoration models(masson pine forest,pure wood lotus forest,pure pine slashes forest,slash pine replanting Schima superba forest,pine replanted spruce forest,and slash pine spruce mixed forest)were selected in Taihe County,Jiangxi Province as the study object,the aggregate size distribution and stability characteristics of various vegetation restoration models were analyzed.[Result](1)The pH value of the soil surface of the pure pine forest was significantly lower than that of other restoration modes,the organic matter content of the pine forest supplemented with tree lotus at the soil surface was the highest,and the TN content of the soil surface of each restoration mode was significantly higher than that of other soil layers.(2)The content of water-stable aggregates in the 0-10 cm topsoil with a grain size of>2 mm in the pine massoniana compensatory tree lotus forest was significantly higher than that of Schima superba pure forest.The mean weight diameter(MWD)and geometric mean diameter(GMD)of the forest were significantly larger than those of the pure masson pine forest,aggregate processing damage rate(PAD)of masson pine pure forest was higher than other recovery modes.(3)The content of water-stable macroaggregates(WR_(0.25))was negatively correlated with aggregate processing damage rate(PAD)and fractal dimension(D),and positively correlated with the average aggregate diameter.[Conclusion]Through the comparison of six vegetation restoration models,the results show that planting mixed forests in the degraded red soil area in Jiangxi Province can improve soil aggregate structure better than pure forests,and mixed forest restoration models are more conducive to s
作者
肖廷琦
刘苑秋
刘晓君
高盼
温林生
XIAO Tingqi;LIU Yuanqiu;LIU Xiaojun;GAO Pan;WEN Linsheng(Key Laboratory of State Forestry and Grassland Administration for Protection and Restoration of Forest Ecosystems in Poyang Lake Basin/College of Forestry,Jiangxi Agricultural University,Nanchang 330045,China;Jiangxi Provincial Key Laboratory of Forest Cultivation Jiangxi Agricultural University,Nanchang 330045,China)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2022年第5期1292-1304,共13页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(42107365)。
关键词
植被恢复
退化红壤区
土壤团聚体
土壤理化性质
稳定性特征
vegetation restoration
degraded red soil area
soil aggregate
soil physicochemical properties
stability characteristics
