| 赵瑞一，刘子琦，蒋建建，吕现福，段逸凡.农作物生长对岩溶生态环境的影响[J].广东农业科学,2013,40(1):158-160 |
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农作物生长对岩溶生态环境的影响 |
| Effect of crop on the karst environment |
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| DOI： |
| 中文关键词: 农作物 石漠化 洞穴滴水 碳同位素 |
| 英文关键词: crops stony desertification cave drop water carbon isotope |
| 基金项目:国家自然科学基金（41001367） |
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| 摘要点击次数: 1674 |
| 全文下载次数: 791 |
| 中文摘要: |
| 贵州省安顺市西秀区本寨洞与石将军洞距离较近，但两个洞穴表层环境差异较大。本寨洞表层有农作物生长，植被状况较好；而石将军洞植被遭到破坏，属于强度石漠化。2011年4月采集本寨洞和石将军洞两个洞穴的洞穴滴水，并测试洞穴滴水中的Ca2+浓度及δ13CDIC值遥测试结果表明，本寨洞洞穴滴水的电导率和Ca2+浓度高于石将军洞，说明农作物通过根部呼吸作用向土壤中释放CO2，导致渗流水对CaCO3的溶蚀量增加，岩溶作用加强。本寨洞的洞穴滴水δ13CDIC值偏轻于石将军洞，说明导致本寨洞岩溶作用增强的CO2主要来自于地表农作物。恢复石漠化地区的植被覆盖对改善岩溶地区生态环境有重要意义。 |
| 英文摘要: |
| Although the distance between Benzhai cave and Shijiangjun cave in Xixiu district Anshun city, Guizhou province was not
long, there were some huge diffierence about the epi-environment for the two caves, the surface with the crops growth and the cover was good in Benzhai cave, on the contrary the plant in Shijiangjun cave was damaged seriously, belonged to the serious desertification area. The cave drop water was collected from the Benzhai cave and the Shijiangjun cave. At the same time, the Ca2+ density and the δ13CDIC of drop water in these caves were tested. The results showed that the conductivity and Ca2+ density of cave dripping in Benzhai cave was higher than that in Shijiangjun cave which explained that the crops released carbon dioxide through the root respiration to soil, made seepage water dissoluted more CaCO3 and strengthed the Karst dynamic. The δ13CDIC of cave dripping in Benzhai cave was partial negative compared with the Shijiangjun cave which meant that the carbon dioxide strengthed the Karst dynamic mainly came from surface crops. So to recover the vegetation coverage in rocky desertification area had important significance to improve karst area ecological environment. |
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