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近年来,长江下游亚区菜籽含油量的变异范围处34.～44.9％,集中在39.0～40.9％.年度间差异3～5％左右.本区内相同品种的地域差异为纬度每增高一度,含油量增加0.4439％.种子形成期光强减弱至自然光强的1/4,含油量比对照降低16.63％;温度与水分差异亦可使含油量降优5～7％.种子形成期是气象因子影响含油量的关键时期,含油量与此期的降水量呈负相关,与日平均温度、≥3℃有效积温、日照时数呈正相关.因此,可用种子形成期的日照时数为主要气象指际,抽苔期日平均温度为辅助指标,在此基础上初步建立含油量预报的数学模型.
In recent years, the variation range of rapeseed oil content in the sub-region of the lower reaches of the Yangtze River ranges from 34 to 44.9% with a concentration of 39.0 to 40.9%, with a difference of 3 to 5% in the year. , The oil content increased by 0.4439%, the light intensity of seeds reduced to 1/4 of natural light intensity, the oil content decreased by 16.63% compared with the control, and the difference of temperature and moisture could also reduce oil content by 5-7% The meteorological factors affect the oil content of the critical period, the oil content and precipitation in this period was negatively correlated with the daily average temperature, ≥3 ℃ effective accumulated temperature, sunshine hours is positively correlated.Therefore, available sunshine hours seed formation period as the main Meteorological indicators, the average temperature of bolting period as an auxiliary indicator, on the basis of this preliminary establishment of a mathematical model of oil content forecast.