种植密度对夏玉米浚单28生长发育及产量的影响

为发挥浚单28的产量潜力,探求适宜的种植密度,采用田间试验研究了不同种植密度对浚单28叶面积指数、干物重、叶绿素、植株抗倒性及产量的影响。结果表明,随着种植密度的增加,浚单28叶面积指数和生物重增加,叶绿素含量和植株抗倒伏能力下降,穗粒数和千粒重降低。在本试验条件下,密度为6.00万株/hm2的产量最高,为11662.5 kg/hm2,在实际生产中,推荐浚单28适宜的种植密度为6.00万～6.75万株/hm2。

Effects of Planting Density on Growth and Yield of Summer Maize Xundan 28

In order to exert the production potential of summer maize variety Xundan28,and explore its suitable planting density,a field test was conducted to study the effects of planting density on the leaf area index,dry matter accumulation,chlorophyll content,plant lodging resistance and yield of Xundan 28.The results showed that increasing planting density enhanced the leaf area index and dry matter accumulation,decreased the chlorophyll content and plant lodging resistance,and reduced the grains per spike and 1000-grain weight.In this experiment,the maize yield in the treatment of 60.0 thousand plants per hectare was the highest,and it was 11662.5 kg/hm2.The recommended suitable planting density of Xundan 28 was 60.0~67.5 thousand plants per hectare in its actual production.