论文部分内容阅读
2012年通过在安阳等6个试点对32个玉米杂交种不同熟期果穗含水量及苞叶特性研究结果表明:(1)成熟时收获、后延3 d、5 d、7 d、9 d收获果穗籽粒含水量均表现为逐渐下降的规律性,成熟后推迟3 d收获果穗水分降低2%左右,推迟5d收获降低3%左右,推迟7d收获降低5%左右,推迟9 d收获降低7%左右。籽粒脱水较快的杂交种有Ymtz09、Ymtz13、Ymtz15、Ymtz17。(2)供试杂交种果穗苞叶层数在5.4~12层之间,成熟时果穗苞叶自然张开度在0~96%之间,果穗苞叶长在14~26.1 cm之间,果穗苞叶宽度在7.6~11.3 cm之间,果穗苞叶厚度在0.15~0.29 mm之间。(3)供试杂交种百粒重各试验点和杂交种间有差异。从成熟时收获、后延3 d、5 d、7 d、9 d收获每个杂交种籽粒重均表现逐渐增加的规律性,说明玉米杂交种合理适度推迟收获,可提高籽粒产量。
In 2012, the moisture content and the husk characteristics of the ears of 32 maize hybrids at different maturity stages were tested in 6 pilot projects in Anyang in 2012: (1) Harvesting, postponing 3 d, 5 d, 7 d and 9 d after harvest The water content of ear grains showed a regular pattern of decline. After ripening, the moisture of ear was reduced by about 2% postponed for 3 d, decreased by 3% postponed for 5 days, decreased by 5% postponed for 7 days and decreased by 7% postponed for 9 days . Hybrids with faster dehydration rate were Ymtz09, Ymtz13, Ymtz15 and Ymtz17. (2) For hybrids, the number of leaf bleb was between 5.4 and 12 layers. The natural opening degree of ear bract at maturity was between 0 and 96%, and the diameter of ear bract was between 14 and 26.1 cm. The width is between 7.6 and 11.3 cm, and the thickness of the ear bracts is between 0.15 and 0.29 mm. (3) There is a difference between the test weight and the hybrids for the 100-seed weight of the test hybrids. The results showed that the grain weight per hybrid harvested at 3 days, 5 days, 7 days and 9 days after harvest was gradually increased, indicating that hybrids of corn could reasonably delay the harvest and increase grain yield.