摘要
为研究鲁西地区高产玉米（〉9000kg／hm^2）适宜种植密度及其产量潜力，探索高产玉米产量形成机制，2012、2013年分别在茌平县韩屯镇和阳谷县七级镇高产玉米区，以中单909为试材，以1．5万株／hm^2为密度梯度，设置从1．5万株／hm^2至18．0万株／hm^212个密度处理进行高产栽培试验。结果表明：两年共24个处理，最低和最高单产分别为3424．5、12676．5kg／hm^2，其中有10个处理单产超过9000kg／hm。；对产量构成因子的分析表明，要达到9000kg／hm^2以上的高产，种植密度在6．0万～13．5万株／hm^2，收获穗数在6．0万-11．5万穗／hm^2；单产与密度呈抛物线关系，9．7万株／hm^2密度处理单产最高；随种植密度增加，穗粒数和千粒重呈先升后降变化。
In order to study the suitable planting density and yield potential of high - yielding maize （ 〉 9 000 kg/hm^2） in western Shandong, and explore the forming mechanism of high yield, the tests with 12 kinds of planting densities were conducted in 2012 and 2013 in Hantun Town of Chiping County and Qiji Town of Yanggu County respectively with Zhongdan 909 as material. The planting density was designed from 15 thousand to 180 thousand plants per hectare with 15 thousand as gradient. The results showed that in the two -year tests, the lowest and highest yields were 3 424.5 and 12 676.5 kg/hm^2 respectively, and 10 treat- ments obtained the yield above 9 000 kg/hm^2. The analysis on yield components showed that to achieve the high yield above 9 000 kg/hm^2, the planting density should be in the range of 60 thousand to 135 thousand plants per hectare, and the number of harvested spikes should be from 60 thousand to 115 thousand per hectare. A parabolic relationship was present between yield per unit area and planting density, and the yield reached the highest at 97 thousand plants per hectare. With the increase of planting density, the grain number per spike and 1 000 -grain weight increased firstly and then decreased.
出处
《山东农业科学》
2015年第5期40-42,共3页
Shandong Agricultural Sciences
基金
国家自然科学基金项目"中国15000kg/hm2高产玉米光温特征及其产量形成机制"(编号:31271663)
关键词
夏玉米
密度
产量
鲁西地区
Summer maize
Density
Yield
Western Shandong area
