我国套作栽培技术应用现状分析

Analysis on the Adoption Status of Relay Cropping Cultivation Techniques in China

在农业生产中,要提高农作物总产量有两条途径:一是靠扩大种植面积,二是靠提高单位面积产量。我国由于人多地少,只能采取第二个途径。在广大的北方地区,热量资源一季有余,两季不足,或在南方大部分省市两季有余,三季不足,若进行合理的套作,可充分利用当地的光热资源,提高土地利用率,是实现提高单位面积产量的有效途径。综述了套作的概念、常见的套作模式及套作栽培的关键技术,分析了套作栽培技术的重要意义及其增产机理。

In agricultural production, there are two ways to increase crop yield, one by expansion of area and the other by increasing the yield of unit area. In Chinese, there are too many people and too little land, so only the second way was available. In the vast northern region, the energy resource is more for one crop, but not enough for two crops in one year. And in most southern region, the energy resource is more for two crops, but not enough for three crops in one year. If we adopt reasonable relay cropping, we can take advantage of the local light, heat and land resources. Therefore, relay cropping is an effective way to increase the yield of unit area. The concept of relay cropping and common relay cropping models was summarized, and the significance and mechanism of increasing yield was analyzed.