丹阳市作物及种植制度气候产量潜力的计算机模拟与分析

运用计算机作物生长模拟模型对江苏省丹阳市的主要粮食作物及种植制度的气候产量潜力进行了分析.结果表明,模拟的作物气候产量潜力以玉米、单季稻为最高.单季稻对当地的光、热、水资源利用较充分,现实产量达到气候潜力的78.2%.模拟的2种种植制度(麦-单季稻,麦/玉米-稻)的气候潜力表明,三熟比二熟高3000kg/hm~2,排水良好,小麦产量可以达到或接近气候潜力,玉米的气候产量潜力则受到生长期内降水量年际变化影响较大.在丹阳市引进春玉米的种植制度,可以充分利用当地的水热资源,提高全年产量及改善单一的种植制度。

COMPUTER SIMULATION AND ANALYSIS OF THE CLIMATIC YIELD POTENTIAL FOR SEVERAL CROP S AND CROPPING SYSTEMS IN DANYANG CITY,JIANGSU PROVINCE

A crop growth simulation model was applied to analyze the climatic yield potential of mainfood crops and different cropping systems in Danyang.The simulated results showed that crops with highestclimatic yield potential were corn and single rice.Single rice could take full utilization of local climatic re-sources and its present actual yield reached 78.2% of the climatic yield potential.Simulated climatic yield po-tential of wheat/corn-late rice cropping pattern was about 3 000kg/hm~2 higher than that of wheat-singlerice cropping pattern.Wheat yield could attain the climatic yield potential when wheat was grown under bet-ter drainage soil condition.As for corn,its potential yield was impacted greatly by the rainfall variation in thegrowth periods.The introduction of corn crop into the local cropping pattern could make full use of localclimatic resources,increase annual yield and improve the mono-cropping patterns in Danyang city.