不同玉米品种子粒脱水速率研究

以郑单958、先玉335、农华101、登海11、中单909、正大12为研究材料,研究了子粒、苞叶、穗轴含水量及其脱水速率。结果表明：不同品种间的子粒、苞叶、穗轴含水量差异极显著,不同品种间的子粒脱水速率差异极显著。子粒含水量与苞叶、穗轴含水量呈极显著正相关,相关系数分别为0.777和0.267,苞叶含水量与穗轴含水量呈极显著正相关,相关系数为0.312。先玉335、农华101在子粒脱水前期较其他品种脱水快且快速脱水时间长,收获时（9月24日）的子粒含水量分别为25.40%和26.58%;符合机械收粒的标准,可作为机械收粒的备选品种。

Grain Dehydration Rate of Different Maize Varieties

In this study, we investigated grain moisture content and dehydration rate of grain, subtending leaf, cob from different maize cultivars of Zhengdan 958, Xianyu 335, Nonghua 101, Denghai 11, Zhongdan 909 and Zhengda 12. The results showed that grain moisture content, subtending leaf moisture content, cob moisture content were significant difference among different maize varieties, dehydration rate of grain was significant difference among different maize varieties. Grain moisture content was highly significantly positively related with that of subtending leaf and cob, with correlation coefficients of 0.777 and 0.267, respectively. Moisture content of subtending leaf was highly significantly positively related with that of cob, and the correlation coefficient was 0.312. Xianyu 335 and Nonghua 101 showed a faster dehydration and a longer rapid dehydration than that of other varieties in the prophase of grain dehydration. At harvest, rain moisture contents of the two varieties were 25.40% and 26.58%, respectively. Their characteristics conformed to the standard of mechanical harvesting grain, which cowld be used as standby varieties.