作　　者： ; ; ; ; ;

机构地区： 中国农业大学资源与环境学院土地资源管理系

出　　处： 《资源科学》 2006年第3期44-51,共8页

摘　　要： 粮食作物审定品种的区域试验产量是当前自然和技术条件下可以实现的产量,用该单产水平计算我国耕地的粮食生产能力更具现实意义。本文以全国105个农业生态小区为研究单元,确定了能够充分发挥其气候生产潜力的种植制度;并以粮食作物审定品种的区域试验产量为基础,计算了各农业生态小区各类耕地的粮食单产;在此基础上,乘以各县各类耕地的面积,得到各县耕地的粮食总生产能力,进而汇总出各农业生态小区乃至全国的耕地粮食总生产能力。研究结果表明:2004年全国耕地的粮食总生产能力为9.20×108t。这一结果与全国同期的粮食产量和粮食消费量相比,表明目前我国的粮食生产依然有较大的增产潜力,粮食安全的耕地资源保障程度较高。 The regional test yield of the certificated grain varieties is a reachable yield under the current natural and technical condition. Based on the regional test yield of the certificated grain varieties, it is much precise to calculate the total capacity of grain production of arable land in China. In the study 105 agro-eologieal regions was selected as study area and the capacity of grain production of arable land was analyzed. Firstly, cropping system in every agro-eeologieal region was determined under the principle that the water and thermal potential could be sufficiently developed. Secondly, based on the regional test yield of the certificated grain varieties, the potential unit yield of one crop for every agro-ecological region was calculated. For rain-fed farmlands, their potential coefficients. The water restriction coefficients were productivity with the thermal potential productivity of farmland grading. And then, the potential unit grain productivities were modified by water-restricting calculated by dividing the water and thermal potential of different grain crop, which were given in regulations yield of every agro-ecological region was got through consulting the cropping system and the potential unit yields of crop. The total grain productivity of each county was obtained through multiplying the area and the potential unit yields of different kinds of cultivated lands. Finally, the total grain productivity in each agro-ecological region and the whole country were obtained by aggregating the potential grain productivity of each county. The results showed that the total potential grain productivity in China was 0.92 billion ton in 2004. It should be pointed out that this calculation of potential grain productivity did not consider the crop growth restriction factors such as soil fertility, soil depth, soil salinity, fertilizer input, and so on. When comparing this figure with the contemporaneous total grain yield and consumption, there is a large gap between the potential grain productivity and the curr

关 键 词： 种植制度 粮食作物 品种试验产量 生产能力 中国

领　　域： [经济管理]