1、 超高产油菜栽培模式的研究 摘 要 本课题主要研究栽培密度对油菜农艺性状的影响规律，以期获得油菜品种 “SRS-1”高产的栽培模式。试验中以栽培密度作为研究因素，通过对“SRS-1”及 对照组“德油 5”的农艺性状的观测和产量的统计分析，从而得出密度对分枝习性 和产量的影响规律。密度对分枝习性的影响规律是稀植条件下更有利于油菜品种 产量性状的形成。667 株/亩时，第一次有效分枝数、全株总分枝数、全株总角数 都达到最大值，当密度大于 1333 株/亩时，这些性状表现出急剧下降的趋势；密度 对产量的影响表现为密植因为群体优势比稀植更有利于高产，但在密度为 667 株/ 亩和 2333 株/亩时，
2、产量也大于平均水平。在本试验中，设计密度为密植条件下即 5000 株/亩时增产显著，产量可达 204.544 kg/亩。 关键词： 油菜，栽培密度，分枝习性，产量 ABSTRACT To study the impact regulation on agronomic characters of Rape under the different cultivation density, and to find out the appropriate density for high yield of rapeseed “SRS-1”, we designed the cultivation d
3、ensity as the research factor.Through the investigation and statistical analysis of the agronomic characters and the yield,we found the regulation that the density impacted on the branch characters and the yield. The regulation between the planting density and the branch characters is that it is mor
4、e advantageous to form the yield characters under the sparse cultivation density than under the close cultivation density. When the planting density is 667 plants / mu, the first effective number of branches, the whole plant total number of branches and The whole plant total number of pods have reac
5、hed the maximum. But when the density is greater than 1,333 plants/ mu, these characters show a sharp downward trend. The impact of density on production is that it is more propitious to get the high yield under the close planting than under the sparse planting because of groups predominance. But th
6、e yield is greater than average level when the density is 667 plants /mu or 2,333 plants/ mu.In this experiment, when the designed density is 5,000 plants/mu, it can increase significantly and reach 204.544 kg /mu in the production. Key words: Rape，Cultivation density，Branch Features，yield 目 录 摘摘 要要 A ABSTRACTBSTRACT. 1 1 绪论绪论.1 1.11.1 研究意义研究意义1 1.21.2 前人研究进展
