不同密度与种植方式对玉米迪卡008主要农艺性状和产量的影响

[目的]为寻求最佳种植方式、提高普通株型玉米品种产量提供理论依据.[方法]采用随机区组设计,研究两种密度和3种种植方式对玉米品种迪卡008的农艺性状和产量的影响.[结果]随着密度的增加,株高、茎粗、穗长、秃尖、行粒数和百粒重呈下降趋势;穗位高、穗粗、行数和产量呈上升趋势.株高、穗长和行粒数在宽窄行方式下有较好的生长表现;行数和百粒重在0.75 m+0.55 m宽窄行下表现最好;茎粗和穗粗以0.80 m+0.40 m种植方式为佳.在不同的种植密度与种植方式下,叶绿素相对含量在4个不同生育时期均表现出先升高后降低的变化趋势,叶面积指数在3个生育时期均表现出逐步升高的趋势.[结论]玉米品种迪卡008在密度为57000株/ha、行距为0.65 m+0.65 m的种植模式下产量最高,可达9677.35 kg/ha.应结合品种自身特性,合理选择种植模式可提高玉米产量.

Effects of different planting densities and cultivation methods on major agronomic characters and yield of maize

【Objective】The purpose of this experiment was to identify the best cultivation method of maize variety Dika 008 and to provide references for ehancing yield of common maize cultivars. 【Method】The effects of two planting densities and three cultivation methods on agronomic traits and yield of maize variety Dika 008 were investigated in a field experiment with randomized block design. 【Result】The results showed that plant height， stem diameter， ear length， barren tip， grains per row and100-grain weight were on the downside when plant density increased， while ear height， ear diameter， rows per ear and yield were on the rise. The plant height， ear length and grains per row presented well in cultivation model of wide-narrow row， the rows and 100-grain weight showed well in cultivation model of 0.75 m+0.55 m， stem and ear diameter showed well in cultivation model of 0.80 m+0.40 m. Under different planting density and cultivation methods， SPAD in leaf increased initially and then decreased during four different growth periods， and leaf area index gradually increased during three different growth periods. 【Conclusion】The yield of Dika 008 was recorded as the highest (9677.35 kg/ha) under the planting density of 57000 plant/ha and cultivation model of 0.65 m+0.65 m. In conclusion， proper cultivation method in accordance with varietal characteristics may improve the maize yield.