Study on growth of super-high-yield summer maize in the ecological area of the Yellow River, Huai and Hai Rivers | 黄淮海超高产夏玉米生长发育特性研究
2011
Chang Jianzhi, Henan Hebi Academy of Agricultural Sciences, Hebi(China) | Zhang Guohe, Henan Hebi Academy of Agricultural Sciences, Hebi(China) | Li Yanchang, Henan Hebi Academy of Agricultural Sciences, Hebi(China)
Chinese. 摘 要：比较研究超高产田（15000kgham2）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10～40d超高产夏玉米田子粒干物质阶段积累速率较高，吐丝50d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。
Show more [+] Less [-]English. 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.
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