摘要
比较研究超高产田(15 000 kg/hm2)和高产田夏玉米的产量构成、叶面积指数、叶绿素含量、干物质积累特性和灌浆速率等指标差异,探索超高产夏玉米生长发育特性。结果表明,超高产田夏玉米较高产田增产15.6%,穗粒数多3.7%,百粒重增加8.9%,超高产主要依赖于百粒重的增加;吐丝后超高产田夏玉米叶面积指数、叶片SPAD值和总干物质积累量均高于高产夏玉米田,吐丝后10～40 d超高产夏玉米田子粒干物质阶段积累速率较高,吐丝50 d后,高产夏玉米田植株衰老,超高产夏玉米子粒仍维持一定的灌浆速率。超高产田夏玉米具有叶面积指数大、干物质积累多、叶绿素含量高和灌浆时期长等生长发育特性,有效增加穗粒数和粒重。
Field experiments were conducted to study the yield components, leaf area index （LAI）, SPAD, dry matter accumulation and grain-filling rate of summer maize between super-high-yield field （15 000 kg/ha） and high-yield field. The results showed that summer maize yield in the super-high-yield field increased by 15.6% than high-yield field, grains per ear was 3.7% and 100-seed weight was 8.9%, super-high-yield hung on the skirts of seed weight. After silking stage, the LAI, SPAD and dry matter of super-high-yield summer maize were higher than high-yield. Grain-filling rate was higher than high-yield in 10 - 40 d after silking, and remained certain level after silking 50d. However, maize plants in high-yield were senescence. Summer maize had the larger LAI, more dry matter accumulation, higher chlorophyll content and longer grain filling periods in the super-high-yield field, and achieved super-high-yield by increasing effectively the grain number and grain weight.
出处
《玉米科学》
CAS
CSCD
北大核心
2011年第4期75-79,共5页
Journal of Maize Sciences
基金
国家玉米产业技术体系(nycytx-02)
关键词
超高产
夏玉米
产量
生长发育
Super high yield
Summer maize
Yield
Growth
