| 1987—2018年西双版纳橡胶林时空变化及其线状特征 |
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| 引用本文： | 翟佳豪,刘影,肖池伟.1987—2018年西双版纳橡胶林时空变化及其线状特征[J].热带地理,2022,42(8):1376-1385. |
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| 作者姓名： | 翟佳豪 刘影 肖池伟 |
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| 作者单位： | 1.江西师范大学 地理与环境学院，南昌 330022;2.中国科学院 地理科学与资源研究所，北京 100101 |
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| 基金项目： | 国家自然科学基金(42001226);江西师范大学研究生创新基金(YJS2021012);江西师范大学研究生国内访学研究项目 |
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| 摘 要： | 基于1987—2018年西双版纳30 m分辨率橡胶林数据集，利用叠置、缓冲区等GIS空间分析方法，对比分析了过去32年橡胶林沿道路、河流和边境线的空间变化特征与区域差异。结果表明：1）1987—2018年，西双版纳橡胶种植面积在道路、河流沿线5 km以内分别增加了1 874.6和1 484.6 km2，在边境地区（国境线20 km缓冲带）增加了1 393.1 km2。2）从道路沿线看，受橡胶种植可达性和交通运输影响，过去32年道路5 km缓冲带内的橡胶林平均占比超过九成。3）从河流沿线看，因灌溉和水源等需求，过去32年河流沿线5 km缓冲带内橡胶林平均占比69.7%。值得注意的是，受天然橡胶价格持续低迷、城镇化与生态环境保护等影响，2010年河流沿线橡胶林种植面积开始下降，沿线2 km内表现尤为显著。4）从边境地区看，西双版纳橡胶林种植呈明显趋边性特征，跨境种植频繁。过去32年边境沿线地区橡胶林平均占比55.6%，且由1987年的35.4%上升到2018年的66.2%，其中，在中缅边境的扩张面积和速率高于中老边境。
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| 关 键 词： | 橡胶林 道路 河流 边境地区 西双版纳 |
| 收稿时间： | 2021-11-08 |
Spatio-Temporal Changes and Linear Characteristics of Rubber Plantations in Xishuangbanna,Southwest China from 1987 to 2018 |
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| Jiahao Zhai,Ying Liu,Chiwei Xiao.Spatio-Temporal Changes and Linear Characteristics of Rubber Plantations in Xishuangbanna,Southwest China from 1987 to 2018[J].Tropical Geography,2022,42(8):1376-1385. |
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| Authors: | Jiahao Zhai Ying Liu Chiwei Xiao |
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| Institution: | 1.School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China;2.Institute of Geographic, Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | The expansion of rubber plantations is an important driving factor and main manifestation of land use/cover change in Xishuangbanna, which has extensive socio-economic and eco-environment effects locally. However, to our knowledge, the expansion trends of rubber plantations are still not clearly understood, such as the distribution characteristics and changes of rubber plantations in traffic corridors, along rivers, and along border regions. Based on the 30 m resolution rubber plantations dataset of Xishuangbanna from 1987 to 2018, we used GIS spatial analysis methods, such as overlay and buffer, to compare the spatial characteristics and regional differences of rubber plantations along roads, rivers, and boundary lines in the past 32 years. The results were as follows: Firstly, from 1987 to 2018, rubber plantations in Xishuangbanna expanded significantly in traffic corridors, along rivers, and along border regions. The planted area of rubber plantations increased by 1,874.6 km2 within 5 km along the roads, 1,484.6 km2 within 5 km along the rivers, and 1,393.1 km2 in the border regions (i.e., a buffer of 20 km). Secondly, roads have been affected by the accessibility of rubber farming and transportation. Over the past 32 years, the average proportion of rubber plantations within the 5 km buffer zone of the roads has exceeded 90%. Roads play an important guiding role in the location selection of rubber plantations. Rubber plantations are planted in areas close to roads, rather than areas far from roads with poor accessibility, because it is not convenient to pick rubber or undergo rubber plantation replacement otherwise, and this may reduce planting or result in a switch to other cash crops. Thirdly, rivers and water source irrigation are important conditions and limiting factors for rubber plantation expansion. In the past 32 years, the average proportion of rubber plantations in the 5 km buffer zone along the rivers has been 69.7%. It is worth noting that, as a result of natural rubber prices remaining low, urbanization, and ecological environmental protection, the planted area of rubber plantations along the river began to decline in the 2010s, especially within 2 km along the line. Finally, in border regions, the rubber plantations showed obvious characteristics of border-proneness in Xishuangbanna. Over the past 32 years, the average proportion has been 55.6% of rubber plantations in the border regions, and this increased from 35.4% in 1987 to 66.2% in 2018. In particular, the expansion area and rate of the Sino–Myanmar border are higher than those of the Sino-Laos border. This study is helpful for clarifying the spatial distribution and change trend of rubber plantations in Xishuangbanna. It provides support for future rubber plantation planting and cross-border cooperation. |
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| Keywords: | rubber roads rivers border regions Xishuangbanna |
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