持续阴雨对不同播期玉米籽粒含水率和机械粒收质量的影响
机械粒收是玉米生产发展的方向，是降低玉米生产成本提高市场竞争力的重要措施。黄淮海区玉米目前处于机械粒收技术示范推广的关键时期。本研究通过分析一年两地持续阴雨对不同播期玉米品种机械粒收质量的影响，为该技术的推广应用提供参考。试验选用华美1号、郑单958、登海605为材料，分析持续阴雨天气下，播期、品种、密度对机械粒收质量的影响。结果表明，在持续降雨条件下，播期、品种和密度间的籽粒含水率、破碎率存在显著差异，品种间的杂质率差异显著，品种、密度间的田间损失率差异显著。综合比较，持续阴雨天气条件下，籽粒含水率是影响机械粒收质量的关键因素，主要通过影响籽粒破碎率影响收获质量。
英文摘要:
Mechanical grain harvest is the development direction of maize production. It is an important measure to reduce the cost of maize production and improve the market competitiveness. The area of Huang-Huai-Hai in the key period of demonstration and popularization of mechanical grain harvest at present. This study analyzed the effect of continuous rain on the quality of mechanical grain harvest of maize at different sowing dates. The experiment selected Huamei 1, Zhengdan 958 and Denghai 605 as materials to analyze the influence of sowing date, variety and density on the quality of mechanical grain harvest under continuous rain. There were significant differences in the kernel moisture content and the breakage rate among varieties and densities, significant differences in the impurity rates among varieties, and significant differences in the shatter loss rates between varieties and densities. The kernel moisture content is the key factor affecting mechanical grain quality, which is mainly affected by the broken rate.
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