松嫩三江平原作物生产潜力分析

Analysis on Crop Productive Potentialities in Songnen and Sanjiang Plain

本文在前人关于作物潜力估算方法研究的基础上，计算了松嫩—三江平原（７８个站点）主要农作物（玉米、水稻、大豆、春小麦）的生产潜力。结果表明，光合潜力分布为西南部多，向东北逐渐减少，与太阳总辐射的分布规律一致；气候潜力的分布则比较复杂，表现出明显的区域性差异，在松嫩平原西南部及三江平原中南部各有一高值区。在松嫩平原区，作物生产主要障碍因子是水分条件，而在三江平原区，主要障碍因子则是热量条件。本区气候资源利用率比较低，具有较大的生产潜力。

It was calculated that the productive potentialities of the main crops (corn,rice,soybean,spring wheat) in Songnen Sanjing plain. The result showes that photo potential is higher in the Southeast and lower in the Northeast; the climate potential has an obvious regional difference; the two areas with high value are the Southwest in Songnen plain and the middle South in Sanjiang Plain; in Songnen Plain, water the major limting factor to crop production; In Sanjiang Plain, the major limiting factor heat.The utilization ratio of climate resources is much less in these districts, So there are greater potentialities of production.