玉米新品种洛玉818群体生理指标研究  

Study on Physiological Indexes of Colony of New Maize Variety Luoyu 818

作　　者：金松灿 李林 万会利 蔡珊利 卫勇强 赵合林 

机构地区：[1]洛阳市种子管理站,河南洛阳471000 [2]洛阳农林科学院,河南洛阳471023 [3]洛阳市农村能源开发工作站,河南洛阳471000

出　　处：《江西农业学报》2014年第6期11-14,共4页Acta Agriculturae Jiangxi

基　　金：河南省玉米育种重大攻关项目(1220010200)

摘　　要：对洛玉818群体生理指标进行了研究,结果表明:洛玉818适宜种植密度为67500株/hm2,产量结构为67068穗/hm2、穗行数15.6、行粒数35.8、千粒重326.5 g,群体生产力得到了充分的发挥,产量达11454.2 kg/hm2。适宜密度下,群体各项生理指标发展协调,叶面积指数(LAI)在吐丝期最大值达到5.72,且稳定期长,成熟时仍达3.19;光合势(LAD)总量达到356.91×104(m2·d)/hm2,在各生育时期的分配合理;净同化率(NAR)与叶面积持续期(LAD)协调较好;干物质积累总量25113.7 kg/hm2,其中吐丝期以后的干物质积累量占全部积累量的60.9%;群体生长率(CGR)达256.7 kg/(hm2·d);灌浆速率始终保持在合理水平。The physiological indexes of colony of new maize variety Luoyu 818 were studied .The results showed that： under the suitable planting density 67500 plant/hm^2 , the yield structure of Luoyu 818 was as follows：the number of spike 67068 spike/hm^2 , number of row per spike 15.6, number of grain per row 35.8, and 1000-grain weight 326.5 g;the colony productivity was exerted sufficiently, and its yield reached 11454.2 kg/hm^2 .Under the condition of suitable planting density , all physiological inde-xes of Luoyu 818 colony developed harmoniously , the leaf area index （ LAI） reached the maximum value （5.72） at silking stage, and it kept at a high level for a long time and was still 3.19 at maturing stage; the gross of leaf area duration （ LAD） reached 3569100 （ m2. d）/hm^2 , and LAD distributed rationally in various growth periods;the net assimilation rate （ NAR） was well coor-dinated with LAD;the total dry matter accumulation amount was 25113.7 kg/hm^2 , and the dry matter accumulation amount after silking stage accounted for 60.9%of the total amount;the colony growth rate （CGR） reached 256.7 kg/（hm^2. d）; the grain-filling rate always stayed at a reasonable level .

关 键 词：玉米 洛玉818 生理指标 

分 类 号：S513[农业科学—作物学]