‘正大12号’玉米种植密度与产量的相关性探讨

Study on the Correlation Between ‘Zhengda No.12' Maize Planting Density and Yield

以玉米品种‘正大12号’为材料,设置5个种植密度[5.25万株/hm2(D1)、6.75万株/hm2(D2)、8.25万株/hm2(D3)、9.75万株/hm2(D4)、11.25万株/hm2(D5)],随机排列,3次重复,研究种植密度对玉米产量的影响,寻求最佳种植密度,为实现玉米超高产栽培创建提供技术依据。结果表明,在D1—D5密度区间,D3密度下产量最高,为15696.0 kg/hm2,产量由高到低的顺序是D3>D4>D2>D1>D5。通过玉米密度与产量的回归方程:y=6168.905x-373.984x2(R**=0.971614)可知,‘正大12号’最高产量密度为8.2476万株/hm2,最高产量可达25439.18 kg/hm2。因此得出,不同种植密度对‘正大12号’产量影响明显,其种植密度为8.2476万株/hm2时玉米产量最高,低于或超过这一密度时产量都呈明显下降趋势,这对宁夏玉米高产创建具有很好的指导作用。

In order to maize varieties is Zhengda No. 12 as material, set 5.25× 10^4/hm^2 （D1）, 6.75× 10^4/hm^2 （D2）, 8.25 × 10^4/hm^2 （D3）, 9.75 ×10^4/hm^2 （D4）, 11.25 × 10^4/hm^2 （DS）× 10^4/hm^2 5 planting densities, random arrangement, repeated 3 times, effect of planting density on maize yield, seek the best planting density, in order to realize the maize super high yield cultivation was created to provide technical basis. The results show that, in the D1-D5 density interval, D3 density was highest, 15696.0 kg/hm^2, yield of the order from high to low was D3 〉 D4 〉 D2 〉 D1 〉 DS. Through the regression equation of maize density and yield： y=6168.905x- 373.984x2 （R=0.971614）, that was ＇Zhengda No.12＇, the highest yield density was 8.2476- 10~/hm^2. The highest yield reached 25439.18 kg/hm^2. Therefore, effects of different planting density on ＇Zhengda No. 12＇ yield significantly, the planting density of 8.2476×10^4/hm^2 corn yield was the highest, less than or more than the density yield significantly decreased, the Ningxia corn high yield with good guidance.