摘要
以2个密植型和2个稀植型玉米品种为材料,分别设计5个密度,雨养旱作条件下,研究比较两种类型玉米品种的产量和群体特征,结果表明,密植品种郑单958、先玉335抗旱性和耐密性突出,在低降水量年份仍可耐受6万～8万株/hm2的较高密度,并且获得12836.1～13914.0kg/hm2的较高产量,比稀植品种承玉10高产处理(4.8万株/hm2)增产15.7%～25.4%,增产显著。密植品种郑单958、先玉335高产处理的群体特征为:叶面积指数(LAI)高,生物产量高,经济系数达0.5以上,密植品种8万株/hm2时穗部透光率与稀植品种4.8万株/hm2时相当。选育推广抗旱耐密高产玉米品种对我国北方雨养旱作区玉米生产具有重要意义。
The yields and population characters of two compact types and two loose type varieties growing under rain-fed condition were investigated under 5 different population densities, respectively. The results indicated that drought resistance and density-resistant performances of Zhengdan 958 and Xianyu 335,both were compact type variety,were quite outstanding with the yield could reach 12836.1 kg/ha to 13914.0kg/ha by planting 60000-80000 plants/ha in the year of low rainfall,led to 15.7% to 25.4% significant yield increase, respectively,in comparison with Chengyu 10, a loose type variety,whose the highest yield of 11093.4kg/ha by planting in 48000 plants/ha. The population Characteristics of Zhengdan 958 and Xianyu 335 were that the leaf area index （LAI） and organism yield were high with economic index could reach at 0.5 or higher, the transmission rate of ear of the compact type variety by planting of 80000 plants/ha was almost the same as that of the loose type variety which planting of 48000 plants/ ha. Breeding and commercialization of the maize varieties with drought-resistance, density-resistance, and high-yield was very important for the corn production in North China rain-fed area.
出处
《作物杂志》
CAS
CSCD
北大核心
2010年第5期39-42,共4页
Crops
关键词
雨养旱作
玉米品种
密度
产量
群体特征
Rain-fed areas
Maize variety
Density
Yield
Population character
