红小豆、大豆以及菜豆的形态特征和出苗日数的相关性

对红小豆、大豆以及菜豆3种豆类品种的种子形态特性进行了调查。3种豆类品种种子的粒重和粒长、粒宽以及粒厚之间有很高的正相关关系。把各种豆类的粒长、粒宽以及粒厚之间的关系用直线回归系数来表示，并使粒形的形态特征数值化。另外，大豆和菜豆种子的粒重和种子所占子叶比率之间成正相关关系，种子的粒重和种子所占胚芽比率之间成负相关关系，但红小豆没有相关关系。通过两年试验，从播种到出苗日数，3种豆类中红小豆最晚（15～20d）。在降雨量多的年份红小豆的出苗日数和种子的大小没有相关性，但是大豆和菜豆的粒重和出苗日数之间成负相关关系。播种时期土壤水分充足时，大豆和菜豆粒重轻的种子比粒重重的种子先出苗，但是红小豆没有看到这种关系。这可能与种子的吸水速度有关。

Correlations between Morphological Characteristics and Days of Emergence of Red Bean, Soybean and Common Bean

A survey to the morphological characteristics of seeds of red bean, soybean and common bean was done. There is of high positive correlation of seed weight, seed length, seed width and seed thickness between the seeds of these 3 kinds of beans. The relations of the seed weight, length, width and the thickness between the seeds of these 3 kinds of beans have been expressed with linear regression coefficient, and numerical representation of the morphological characteristics of the seed was made. In addition, the seed weight and ratio of the cotyledons of soybean＇s and common bean＇s seeds is positively correlated, while the seed weight and the ratio of germ is negatively correlated, but no correlation between red bean. Through two years trial, red bean was proved with the longest days of emergence （ 15 to 20 days） among these three kinds of beans. There is no correlations between the days of emergence and the size of the seed when there is enough rainfall, while the days of emergence and the seed weight of soybean and common bean is negatively correlated. The lighter seeds emergence earlier than the heavier ones when there is adequate water during the sowing period, however, it didnt happen with red bean, which could be possibly related to the water absorption speed.