我国农作区资源节约农作压力空间分布研究

Spatial distribution of pressure index of resource-saving farming system in main farming zones in China

  • 摘要: 资源节约型农作制是进行农业资源节约、高效利用的农作制度, 将成为我国农业生产中突破资源短缺这一发展瓶颈的有效手段。为明确我国主要农作区的资源特点和节约压力, 选择农业水、耕地、化肥3 种资源为主要研究对象, 根据目前各农作区3 种资源的数量、消耗率、粮食产量水平等指标, 初步计算了各区节水压力、节地压力与节肥压力, 并据此初步推导出各区资源节约农作制的综合压力指数, 研究了资源节约农作制压力的空间分布。结果显示: 我国绝大多数农作区资源节约型农作制压力处于中度以下, 东部各农作区大于西部各农作区, 南方各农作区大于北方各农作区; 节水重点区主要是北方的东北区、黄淮海区、西北区和北部低中高原区, 节地重点区主要是东南部的长江中下游地区、江南地区和华南区, 节肥重点区主要是四川盆地、华南区和江南区。

     

    Abstract: Resources-saving farming system, an resources-saving and high-efficiency farming practice, offers an effective solution to resource shortage problems in China’s agricultural sector. To evaluate the state of agricultural resources and resource-saving pressures in main farming zones in China, agricultural water, arable land and chemical fertilizer were advanced as research objects. The pressure indices of water-saving, land-saving and fertilizer-saving were also calculated using resources quantities, consumption rates, and grain yield in different farming zones. Furthermore, the comprehensive resource-saving pressure index and its spatial distributions in different farming zones were analyzed. The results indicated that resource-saving pressure of farming system in most farming zones in China were moderate to low. The pressure indices for East and South China were higher than those for West and North China. North China suffered from water shortages, while South China had acute shortage of arable lands. East China suffered from over-use of chemical fertilizers. Specifically, the most important areas of water-saving were the Northeast China, Huanghuaihai Area, Northwest China, and the lower and middle plateau regions. Area requiring urgent land-saving located in Southeast China, including the middle and lower reaches of Changjiang River, Jiang-nan Area and South China. In contrast, Sichuan Basin, South China and Jiang-nan Area should focus more on fertilizer saving.

     

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