攀西地区玉米产量构成特点及高产途径探讨

Analyses of yield components and high yielding approaches of maize in Panxi region

本文根据1999．2006年共6年时间在攀西地区进行的249个品种（材料）的品种比较试验、3个不同类型主推品种的种植密度试验和最优回归试验结果，通过系统分析得出，品种间株高和穗位高与玉米籽粒的产量无显著相关性．穗行数对产量的贡献最大；就特定品种而言，旺盛的营养体是籽粒高产的基础，有效穗数对产量的贡献最大，其次是千粒重，品种间和3个主推品种的穗长和行粒数对产量的贡献均较小。本文还讨论了攀西地区玉米的高产栽培途径。

The variety comparison trials with 249 varieties,planting density and optimal regression experiments with three kinds of mainly ex- tended varieties were conducted during 1999 to 2006 in Panxi region, China. The analytical results were as follows：among different varieties, there were no significant correlation among plant height and ear height with grain yield, and the number of ear rows had the largest contribution to grain yield. For the three kinds of mainly extended varieties, the number of fertile earn had the largest contribution,while the 1000 - kernel weight the secondly, to grain yield. However, the contribution of ear length and number of kernels per row to grain yield were less. The high yielding approaches of maize in Panxi region were also discussed in this paper.