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应用生态学报 ›› 2011, Vol. 22 ›› Issue (04): 885-890.

• 研究报告 • 上一篇    下一篇

江西瑞昌石灰岩山区退耕还林对土壤有机碳的影响

刘苑秋1**,王芳2,柯国庆3,王迎迎4,郭圣茂1,范承芳3   

  1. 1江西农业大学林学院, 南昌 330045|2山东省新泰市农业局环保站, 山东新泰 271200|3瑞昌市林业局, 江西瑞昌 332200;4深圳城市果菜贸易公司, 广东深圳 518000
  • 出版日期:2011-04-18 发布日期:2011-04-18

Effects of converting cultivated land into forest land on the characteristics of soil organic carbon in limestone mountain area in Ruichang, Jiangxi.

LIU Yuan-qiu1, WANG Fang2, KE Guo-qing3, WANG Ying-ying4, GUO Shen-mao1, FAN Cheng-fang3   

  1. 1College of Forestry, Jiangxi Agricultural University, Nangchang 330045, China|2Station of Environmental Protection, Xintai Bureau of Agriculture, Xintai 271200, Shandong, China|3Ruichang Bureau of Forestry, Ruichang 332200, Jiangxi, China;4Shenzhen Fruit and Vegetable Company, Shenzhen 518000, Guangdong, China
  • Online:2011-04-18 Published:2011-04-18

摘要: 以江西瑞昌石灰岩山区退耕还林5年的林地为对象,研究了不同退耕还林模式(林苗一体化、药用纯林、多树种混交和竹阔混交)对土壤有机碳含量的影响.结果表明:与对照相比,退耕还林地0~20 cm土层的土壤有机碳、微生物生物量碳和可矿化碳含量分别增加24.4%、29%和18.4%,退耕还林显著提高了土壤有机碳含量,增强了土壤碳储能力;0~10 cm土层的土壤有机碳、微生物生物量碳和可矿化碳含量极显著高于10~20 cm土层,且退耕还林地土层间差异大于对照;4种退耕还林模式中,林苗一体化模式对土壤有机碳的影响较大.

关键词: 退耕还林, 土壤有机碳, 石灰岩山区

Abstract: Taking the forest lands having been converted from cultivated land for 5 years in Ruichang City of Jiangxi Province as test objects, this paper studied the characteristics of soil organic carbon (SOC) under 4 different conversion models (forest-seedling integration, pure medicinal forest, bamboo-broadleaved mixed forest, and multi-species mixed forest). After the conversion from cultivated land into forestlands, the contents of SOC, microbial biomass carbon (MBC), and mineralizable carbon (PMC) in 0-20 cm soil layer increased by 24.4%, 29%, and 18.4%, respectively, compared with those under the conversion from cultivated land into wasteland (P<0.05), which indicated that the conversion from cultivated land into forest lands significantly increased the SOC content and SOC storage. The SOC, MBC, and PMC contents in 0-10 cm soil layer were significantly higher than those in 10-20 cm soil layer (P<0.01), and the differences between the soil layers of the four forest lands were higher than those of the wasteland. Among the 4 conversion models, forest-seedling integration had more obvious effects on SOC.

Key words: converting cultivated land into forestland, soil organic carbon, limestone mountain area