摘要
为了确定河南省夏玉米最佳收获期,2009年利用48个玉米新品种(组合)进行了夏玉米最佳收获期研究,结果表明,当籽粒黑层形成(达到生理成熟)时,籽粒含水量在25%～35%,果穗苞叶完全变干,彻底松散,可作为收获期标准。个别品种稍有差异。籽粒乳线位置品种间变化较大,如10月10日,2个品种籽粒乳线消失,6个品种乳线位置在70%～80%,10个品种在80%～90%,30个品种在90%～100%,乳线消失不能作为收获期的标准。在河南省一年两熟制地区,10月上旬为夏玉米的最佳收获期。
The optimum harvest date of 48 new maize varieties in Henan province was studied in 2009.The results showed that when the black chromatograph of the grain appeared,the kernel moisture content was 25%-35% and the ear bract was completely dry and loose,which were considered as the standards of optimum harvest date.The position of the grain mammary line changed greatly among varieties.On Oct 10,the grain mammary of two varieties disappeared,six varieties were 70%-80%,ten varieties were 80%-90%,and thirty varieties were 90%-100%.Therefore disappearance of grain mammary line could not be used as the standard of optimum harvest date.Considering the yield of two crops in the main grain production areas with two crops a year,the optimum harvest date of summer maize in Henan province was the first ten days of October.
出处
《河南农业科学》
CSCD
北大核心
2011年第6期46-48,55,共4页
Journal of Henan Agricultural Sciences
基金
河南省重大科技专项(0620010200)
关键词
夏玉米
乳线
黑层
苞叶
最佳收获期
Summer maize
Mammary line
Black chromatographic
Ear bract
Optimum harvest date
