Analysis of Growth Feature and Population Construction of Sweet Maize Mintian 208
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摘要: 多年生育特性观测表明, ‘闽甜208’甜玉米春播采青生育期8690d, 秋播采青生育期7376d, 生育动态呈现苗期弱, 中间旺长稳定期短, 后期早衰快的生育特性, 栽培上要注重精细播种, 各项田间管理要及时到位。群体结构试验表明, ‘闽甜208’叶面积系数 (LAI) 及叶片净同率 (NAR) 较高, 峰值持续时间较长, 大喇叭口至抽雄期LAI对NAR影响最大, 通过密植保证一定的总粒数, 增加抽雄后群体叶面积及干物质积累, 提高成粒率, 是高产的关键措施, 适宜种植密度为4.95万5.40万株·hm-2。Abstract: Growth characteristics and population construction of Mintian 208 were studied.Growth characteristic results showed that the growth period of Mintian 208 is 86-90 days in spring or 73-76 days in autumn in Fuzhou, and the growth are slowly in the first stages, shortly stong growth at middle and fast presenility at late stages.Our results suggest that sowing quality should be well and all management should be on time.Population construction results showed that leaf area index (LAI) and net assimilation rate (NAR) of Mintian 208 are high and their peak values sustains longer, LAI affects NAR most significantly between booting stage and heading stage, suggesting that the key measures for high yield are increasing plant density to ensure plentiful grain number, accumulating dry matter after heading stage and increasing rate of grain.Meanwhile, optimal planting density was 5760thousand plants per hectare.
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Key words:
- Mintian 208 /
- growth feature /
- population construction
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