Analysis on Yield Structural Model and Key Factors of Maize High-yield Plots
Analysis on Yield Structural Model and Key Factors of Maize High-yield Plots
复制标题
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Zhao Jiuran
中科院分区：
文献类型：
--
作者：
Zhao Jiuran
共有41块玉米高产地块超过1.5万公斤/公顷产量水平，2008年出现3个新亮点。一是数量和面积显著增加。其次，大部分高产地块分布在内蒙古和黄土高原。三是四川首次出现了温度较高、日照较少的玉米高产地块。41个玉米高产地块的产量结构模型为88 110穗/公顷，每穗530粒，千粒重368.3 g，每穗粒重191.4 g。产量水平主要决定于粒数和穗粒重，提高粒数是提高穗粒重的关键。光温条件、品种和种植密度是玉米产量的决定因素。
A total of 41 maize high-yield plots exceeded the yield level of 15 000 kg/ha,and three newhighlights presented in 2008.First,the number and area increased remarkably.Second,most high-yield plots distributed in Inner Mongolian and Loess Plateaus.Third,maize high-yield plot appeared for the first time in Sichuan province which is characterized by higher temperature and less sunlight radiation.The yield structural model of 41 maize high-yield plots was 88 110 ears/ha,530 kernels per ear,the 1 000-kernel weight and the grain weight per ear were 368.3 g and 191.4 g,respectively.The yield level mainly determined on the kernel number and grain weight per ear,and increasing the kernel number was the key to enhance the grain weight per ear.The light and temperature condition,cultivar and planting density were yield determinant factors in maize production.