| 引用本文: | 张宝成, 白艳芬, 李宪碧, 王 平, 邓忠菊, 金 星, 丁奎婷.汉中盆地秸秆还田撂荒和林地对土壤碳的影响[J].广西植物,2018,38(8):1081-1087.[点击复制] |
| ZHANG Baocheng, BAI Yanfen, LI Xianbi, WANG Ping,
DENG Zhongju, JIN Xing, DING Kuiting.Effects of straw returning farmland, abandoned land and woodland on soil carbon in Hanzhong basin[J].Guihaia,2018,38(8):1081-1087.[点击复制] |
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| 汉中盆地秸秆还田撂荒和林地对土壤碳的影响 |
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张宝成1, 白艳芬1, 李宪碧1, 王 平2, 邓忠菊1, 金 星3, 丁奎婷1
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1. 遵义师范学院 生物与农业科技学院, 贵州 遵义 563002;2. 海南热带海洋学院 海洋科学技术学院,
海南 三亚 572022;3. 遵义师范学院 物理与电子科学学院, 贵州 遵义 563002
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| 摘要: |
| 农业活动是温室气体重要的排放源,土壤碳库[土壤有机碳(SOC)和无机碳(SIC)]稍微变化会对大气CO2产生很大影响。汉中盆地是南水北调的重要水源涵养地,在该区域秸秆还田、农田撂荒和林地是目前常见土地利用方式,但缺乏不同利用方式对SIC和SOC影响的研究。该研究采集该区域典型样地土壤,用滴定法和有机碳分析仪分别测定其SIC和SOC含量,研究3种土地利用方式对土壤碳库的影响。结果表明:SOC随土层深度最为敏感的是农田,其次是撂荒地,林地最不敏感。0～140 cm土层SOC碳密度,林地最大,是撂荒田的2.26倍,农田是撂荒田的1.37倍。深土层SOC碳密度,林地是撂荒田的2.44倍,农田是撂荒田的 1.07倍。撂荒田的SIC密度最大,其次是农田,林地的SIC碳密度最低。在0～140 cm土层中,SIC密度依次为12.37、11.68和9.77 kg·m2,撂荒田的SIC碳密度是林地的1.27倍。随着我国农村发展,土地利用管理出现新的方式,今后在估算土地利用管理方式对土壤碳影响时还需要综合考虑SOC和SIC。 |
| 关键词: 土壤有机碳, 秸秆还田, 林地, 土壤无机碳, 农田撂荒 |
| DOI：10.11931/guihaia.gxzw201710002 |
| 分类号:Q948 |
| 文章编号:1000-3142(2018)08-1081-07 |
| 基金项目:国家自然科学基金(31660106); 贵州省千层次创新型人才项目(遵市科合人才 [2016]4号); 遵义师范学院博士基金(遵师BS [2014]06和BS [2014]07号); 贵州省科技厅合作项目(黔科合 LH 字 [2017]7063 号); 贵州省教育厅高校自然科学研究项目(黔教合KY字 [2017]052); 海南省自然科学基金(417151); 海南热带海洋学院博士科研启动项目(RHDXB201613); 院教学改革项目(RDJGb2016-18); 海南省特色重点学科建设方案项目(2017)[Supported by the National Natural Science Foundation of China(31660106); Thousand-Level Innovative Talents in Guizhou Province([2016]4); Doctoral Foundation of Zunyi Normal University([2014] 06, 07); Science and Technology Cooperation Program of Guizhou Province(LH [2017] 7063); Natural Science Research Program of Guizhou Province(KY [2017] 052)]; Hainan Provincial Natural Science Foundation of China(417151); Scientific Research Starting Foundation for Doctors of Hainan Tropical Ocean University(RHDXB201613); School Teaching Reform Program(RDJGb2016-18); Hainan Provincial Key Discipline Construction Program(2017)。 |
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| Effects of straw returning farmland, abandoned land and woodland on soil carbon in Hanzhong basin |
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ZHANG Baocheng1, BAI Yanfen1, LI Xianbi1, WANG Ping2,
DENG Zhongju1, JIN Xing3, DING Kuiting1
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1. College of Life &2.Agriculture Science, Zunyi Normal University, Zunyi 563002, Guizhou, China;3.2. School of Science &4.Technology, Hainan Tropical Ocean University, Sanya 572022, Hainan, China;5.3. School of Physics and Electronic
Science, Zunyi Normal University, Zunyi 563002, Guizhou, China
1. College of Life & Agriculture Science, Zunyi Normal University, Zunyi 563002, Guizhou, China; 2. School of Science &
Technology, Hainan Tropical Ocean University, Sanya 572022, Hainan, China; 3. School of Physics and Electronic
Science, Zunyi Normal University, Zunyi 563002, Guizhou, China
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| Abstract: |
| Due to the increase of atmospheric gas concentration in greenhouse, climate warming caused great inconvenience to people's production and living. Therefore, soil carbon pool [soil organic carbon(SOC)and soil inorganic carbon(SIC)] has attracted much attention. Straw returning farmlands and abandoned farmland changed the input carbon, which affected the SIC and SOC conversion processes and soil carbon pool. SIC has a long retention time, and SOC plays an important role in the formation of soil aggregates and the adsorption of mineral nutrients for plants. With rural population reduction, straw returning farmland, abandoned land and woodland are very common. There is lack of research on the effects of land use change on different soil carbons. The results showed that SOC is the most sensitive to the soil depth of the farmland, followed by abandoned land, the lowest sensitive forest land. The density of SOC in the topsoil of forest land was the largest, followed by farmland, and the smallest was abandoned. The SOC carbon density in woodland was 2.26 times of that in abandoned land. SOC carbon density in farmland was 1.37 times of that in abandoned land in 0-140 cm soil. The abandonment farmland SIC density was the biggest, followed by farmland, with the lowest SIC carbon density in forestlands. In the 0-140 cm soil layer, the SIC densities were 12.37, 11.68 and 9.77 kg · m-2, respectively. SIC carbon density in abandoned fields was 1.27 times that of woodland. With the development of rural areas in China, a new way of land use management has emerged, estimating the impact of land use on soil carbon needs to consider SOC and SIC. |
| Key words: soil organic carbon, straw returning farmland, woodland, soil inorganic carbon, abandoned land |
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