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为研究黄淮海夏玉米乳线位置与粒重及机械化收获的关系,选用推广面积较大的8个品种(A、B、C、D、E、F、G、H)作为处理,测定其灌浆速率、百粒重、含水量及乳线位置等性状,并分析其相关性。结果表明:乳线位置在90%时籽粒灌浆已经结束,百粒重出现峰值,最高为43.02 g,灌浆时间与百粒重程正相关,乳线完全消失后,百粒重最大可降低8.66%;在粒重上升期处理间差异不显著,下降期处理D、E、H与其他处理间差异达极显著水平;脱水速率处理C、A与其他6个处理间差异显著;籽粒含水量与乳线位置呈负相关,乳线下移至90%,籽粒含水量在30%以下。影响夏玉米机械化收获籽粒的关键因素是收获时间,而不是品种;乳线位置下移至90%是夏玉米收获的最佳时间,收获过晚产量会有不同程度的降低。
In order to study the relationship between the position of maize yam and the grain weight and mechanization harvest in Huang-Huai-Hai summer maize, 8 varieties (A, B, C, D, E, F, G and H) Rate, 100-grain weight, water content and the location of the milk line and other traits, and analyze the correlation. The results showed that grain filling at the position of 90% of the milk yarns had ended, the peak value of the 100-grain weight appeared, the highest was 43.02 g, and the filling time was positively correlated with the 100-grain weight. ; There was no significant difference between the treatments at the ascending stage of grain weight. The differences between the treatments D, E, H and other treatments at the descending stage reached extremely significant levels. The differences between the treatments C and A at the dehydration rate and the other 6 treatments were significant. The location of the line was negatively correlated with the milkline moving down to 90% and the grain moisture content below 30%. Affect the summer corn mechanized grain harvest key factor is the harvest time, not the variety; milk position down to 90% summer maize harvest is the best time, late harvest will have different degrees of reduction.