| 中国西部区耕地等别空间分布特征 |
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| 引用本文： | 孔祥斌,张青璞.中国西部区耕地等别空间分布特征[J].农业工程学报,2012,28(22):1-7. |
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| 作者姓名： | 孔祥斌 张青璞 |
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| 作者单位： | 1. 中国农业大学资源与环境学院,北京 100193
2. 国土资源部农用地质量与监控重点实验室,北京 100193 |
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| 基金项目： | 国土资源部公益性行业科研专项经费课题：耕地等级变化监测布控技术研究及耕地等级监测技术西部地区示范（201011006-3） |
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| 摘 要： | 在总体上把握西部区耕地质量分布特征,对于制定适合西部区耕地质量保护和提升对策意义重大。该文以西部区12省的农用地分等国家级汇总结果为基础,分析了西部区耕地等别在空间上的分布特征。研究结果表明,西部区耕地等别范围为4～15等,平均等别为11.2等,与全国总体水平相比,耕地等别总体偏低;西部各省耕地等别差异明显,广西、四川、重庆等南部省份等别较高,等别集中在6～10等,甘肃、内蒙、青海等北部省份等别较低,集中在10等以后;从土地利用分区来看,西南区的耕地等别高于西北区和青藏区;从标准耕制度分区来看,各一级指标区间耕地质量分布差异明显,华南区、江南区、四川盆地区等地区耕地等别较高,青藏高原、内蒙古高原及长城沿线区、东北区的耕地等别较低;同一指标区内,耕地复种次数越多,等别越高,灌溉水田或水浇地的等别总体高于旱地,海拔低的耕地等别高于海拔高的耕地等别;西部区的耕地等别分布特征表明,优先保护复种指数高的耕地,相同复种指数的优先保护水浇地和水田。该研究为制定西部区耕地空间布局优化、质量提升对策提供依据。
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| 关 键 词： | 土地利用 分等 优化 耕地 土地评价 西部地区 |
| 收稿时间： | 6/6/2012 12:00:00 AM |
| 修稿时间： | 2012/10/11 0:00:00 |
Spatial distribution characteristics of arable land grade in Western China |
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| Kong Xiangbin and Zhang Qingpu.Spatial distribution characteristics of arable land grade in Western China[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(22):1-7. |
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| Authors: | Kong Xiangbin and Zhang Qingpu |
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| Institution: | 1 (1. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; 2. Key Laboratory for Farmland Land Quality and Monitoring of National Ministry of Land Resources, Beijing 100193, China) |
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| Abstract: | Understanding the distribution characteristics of arable land grade in the Western China is significant to make the scientific decision base for the use and improvement in arable land quality. In this study, the distribution characteristics of the arable land grade in the Western China including 12 provinces were analyzed based on the accomplishments of cultivated land classification in China. The results showed that the average arable grade was 11.2 and ranged from 4 to 15, compared with the national level, which was relatively lower. There was a great gap for arable land grade among the different provinces. The arable land grade in the southern provinces such as Guangxi, Sichuan, Chongqing, etc, had a higher quality, which ranged from 6 to 10, however, that in northern provinces such as Gansu, Neimeng, Qinghai etc, had a lower grade and that ranged from 10 to 15. According to the land utilization zone in China, arable land grade in southwest zone was higher than that in northwest zone and Qinghai-Tibet zone. The arable land grade was significant different with the different agricultural grading zones. Arable land grade was higher in such agricultural grading zones as south China, the southern Yangzi river, and Sichuan basin than that in Tibet plateau, Inter- Mongolia region, and the northeast of China. Arable land grades were increased with the increasing in cropping indicator, and the available degree of irrigation. The arable land grade was higher in low altitude than that in high altitude within the same agricultural grading zone. The results indicated that the arable land use and policy making for improvement in arable land quality should be formulated in accord with the distribution characteristics of the arable land. This research provides a reference for policy making about space arrangement optimization and quality improvement for arable land in Western China. |
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| Keywords: | land use classification optimization arable land land evaluation western region of China |
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