论文部分内容阅读
采用正交旋转组合设计,首次系统研究了不同品种、不同播期、不同生长发育阶段、地上地下不同器官干重对比叶面积的影响,并建立了华双3号抽薹期SLA与密度、氮肥、磷肥、钾肥、硼肥的数学模型。单因子分析表明,密度、氮肥、磷肥、钾肥、硼肥与比叶面积均存在抛物线关系,各因子的绝对贡献为密度>钾肥>磷肥>氮肥>硼肥。冬油菜的比叶面积在发育进程中呈现降-升-降趋势,除越冬期外,其各生育期之间比叶面积变化差异显著,品种间的比叶面积差异不显著,与叶重、茎重和根重之间均呈负相关。通径分析表明,比叶面积不仅受叶重、茎重、根重的影响,而且受3者间交互作用的影响。比叶面积可以作为群体营养状况和临界施肥量的诊断指标。生育前期重点促进叶重和生育中后期重点促进茎重的增长有利于获得较小的比叶面积,实现优势群体。
Using orthogonal rotation combination design, the effects of different varieties, different sowing dates, different growth and development stages, dry weight of different organs above and below ground on leaf area were systematically studied for the first time. And the effects of SLA, Phosphate fertilizer, potash, boron fertilizer mathematical model. Single factor analysis showed that there was a parabolic relationship between density, nitrogen fertilizer, phosphate fertilizer, potash fertilizer, boron fertilizer and specific leaf area. The absolute contribution of each factor was density> potash fertilizer> phosphate fertilizer> nitrogen fertilizer> boron fertilizer. The specific leaf area of winter rape showed a decreasing-rising-decreasing trend in the process of development. Except during winter, the specific leaf area varied significantly among different growth stages. The specific leaf area was not significantly different among varieties, There was a negative correlation between stem weight and root weight. Path analysis showed that specific leaf area was affected not only by leaf weight, stem weight and root weight, but also by the interaction between the three. Specific leaf area can be used as a group of nutritional status and critical fertilization diagnostic indicators. Focus on early stage of growth to promote leaf weight and fertility in the middle and late focus on promoting the growth of stem weight is conducive to obtaining a smaller specific leaf area to achieve the dominant population.