Effect Of Environmental Factors On Growth-development And Quality Formation Of Rapeseed

We studied the relationship between environment and quality of rapeseed, and the effects made by different ecologies due to different seeding dates of rapeseed. And we choose Huashuang No.3 as experiment material.1. The different environment due to different seeding dates made big difference in accumulation of dry matter. And this difference affected the indicators of economic characters. The seeding date is earlier, and more dry matter has been accumulated and higher indicators of economic characters. So if we want to promote the yield of rapeseed, we should choose a exact seeding date.2. The length of whole growth course of rapeseed is positive correlation with even temperature per day, hours of sunshine and accumulated temperature. Most development stages have negative correlation with even temperature per day. The fluctuation breathes of growth course are different. From 25% flowering to end flowering have the biggest CV, and from emerge to bolting have the smallest CV.3. The indicators of economic characters, such as numbers of pods in major inflorescence, branchy stem, numbers of pods per plant, decreased, because of the decreasing of environment indicators, such as accumulated temperature, ground temperature, hours of sunshine, etc. The economic characters have no obvious relationship with precipitation and humidity.4. Oil content per plant was vary significantly relative to accumulated temperature, and was significantly relative to even temperature per day, both are positive. Accumulated temperature had positive correlation with some indicators, such as oil content ofprimary branchy stem and major inflorescence, oleic acid content of primary branchy stems, but had negative correlation with erucic acid content of primary branchy stems, and glucosinolates content of major inflorescence. Even temperature per day had positive correlation with oleic acid content of major inflorescence and had negative correlation with erucic acid content of major inflorescence and glucosinolates content of primary branchy stems and major inflorescence.