2006-2014年,辽宁省粮食丰产科技工程项目组在辽西项目区开展了玉米高产潜力探索及小面积超高产创建工作。本文对经过严格测产且产量达到和超过15000 kg.hm-2 的32个地块的地理分布、种植品种、种植密度、产量和产量构成因素及创建关键技术分析表明：(1)从纬度看,高产田均出现在40.82゜-42.07゜N 范围内；从海拔看,高产田出现在1000 m以下。(2)玉米高产田的平均产量为16630.5 kg.hm-2,75%以上高产田块的种植密度超过6.75×104株.hm-2,收获穗数与产量呈正相关关系。(3)辽单565产量为15025.5-18822.2 kg.hm-2,收获穗数69800-93200 穗.hm-2,穗粒数453-510粒,千粒重422.5-463.9g,穗粒重190.3-233.6g。(4)高产关键技术主要是采用耐密型高产稳产品种,合理提高密度,充足的水肥供给,科学管理和地膜覆盖等。
英文摘要:
Corn yield potential exploration and small area of super-high-yielding creation work were carried out by Liaoning Grain Productive Technology Engineering Team in project area of western Liaoning province from 2006 to 2014. The results of geographical distribution, planting varieties, plant population, yield and yield components and key field management in 32 trial plots, which yield was equal to or above 15000 kg/hm2 were showed that, (1) High-yielding plots usually distributed at 40.82゜-42.07゜N and below 1000m elevation. (2) Average yield of High-yielding plot was 16630.5 kg/hm2, which plant density of 75% plot was 6.75×104plant/hm2. Harvest ear number was positive related to yield. (3) Seed yield of Liaodan 565 was from 15025.5 to 18822.2 kg/hm2, the harvest ear number was from 69800 to 93200 ear/hm2, the kernel number per ear was from 453 to 510, the 1000 kernel weight was from 422.5 to 463.9g, kernel weight per ear was from 190.3 to 233.6g. (4) High yielding technology was mainly about that, choosing high density tolerant and high-yielding variety, increasing plant population, higher water and fertilizer supply, scientific management and plastic film mulching, etc.
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