摘要
研究了玉米新品种洛玉7号的群体生理指标,结果表明:洛玉7号适宜种植密度为60 000株/hm2。在此密度下,群体叶面积指数发展动态合理,具有"前快、中稳、后衰慢"的特点,最大叶面积指数5.32,稳定期在20d以上,成熟时仍达2.75;总光合势每公顷325.67万(m2/d);全生育期净同化率平均7.76g/(m2.d);干物质积累总量23 438.9kg/hm2,其中,吐丝期以后的干物质积累量占全部积累量的60%;群体生长率231.1kg/(hm2.d);灌浆速率始终保持较高水平,后期灌浆持续时间长,强度高;最终产量达12 028.4kg/hm2。
The study on group physiological indexes of new maize variety Luoyu 7 showed that the suitable planting density was 60000 plants/ha.Under the suitable density,the development dynamic of group leaf area index was reasonable,with ＂rapid increase in early stage,steady in mid stage and slow decrease in late stage＂ characteristics.In silking stage,the biggest leaf area index reached 5.32,with the stable phase more than 20 days,and the leaf area index was 2.75 at maturing stage.The total photosynthetic potential was 325.67×104（m^2·d）/ha.The net assimilation rate during the whole stages was 7.76g/（m^2·d） in average.The dry matter accumulation quantity was 23438.9 kg/ha,and the accumulation quantity in silking stage accounted for 60%.The group growth rate was 231.1kg/（ha·d）.The grain filling rate was always at a high level,and late filling lasted for a long time,with a high strength.Its final production reached 12028.4kg/ha.
出处
《河南农业科学》
CSCD
北大核心
2011年第12期52-55,共4页
Journal of Henan Agricultural Sciences
基金
国家农业科技成果转化资金项目(2009GB2D000224)
关键词
玉米
洛玉7号
群体
生理指标
Maize
Luoyu 7
Group
Physiological indexes
