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油莱是越年生作物,冬季有一个基本停止生长的越冬期,因而油菜生育上明显地分为年(春节)前生长和年后生长两个阶段。实践证明,这两个阶段有着密切的关系。农谚“油菜要丰收,全靠年前发好蔸”,“年前不发蔸,产量减半收”,就生动地说明了年前生长状况与年后生育及产量的关系很密切。为进一步明确这种关系,我所1973年和1975年曾在大田进行定点定株观察和小区试验。研究结果表明,油菜越冬期植株形态与年后产量的相关系数达到中等正相关到高度正相关。
Oilleaf is a perennial crop, winter has a basic stop growing during the winter, so the rape’s reproductive growth was clearly divided into years (Spring Festival) growth and growth after two stages. Practice has proved that these two stages are closely related. Farming proverb “rape to harvest, all relying on years ago made a good boil,” “not fat years ago, half the yield to close,” vividly illustrates the growth of years ago and fertility years after birth is closely related to the yield. To further clarify this relationship, we made fixed-point observation and plot tests in Daejeon in 1973 and 1975. The results showed that there was a positive correlation between the positive correlation and the correlation coefficient between plant morphology and annual yield of overwinter rape.