两个绿豆品种根系发育生物学特性的比较

在3种环境下比较了苏绿1号绿豆和江浦永宁绿豆根系的发育生物学特性,结果表明:2种绿豆根系的自然分布均为2个圆锥体的复合体,其纵切面均为2个紧密结合的等腰三角形,上三角形顶角朝上,腰较短;下三角形顶角朝下,腰较长。根系的这种空间分布模式自植株三叶期即已形成。随着生育期的不断推进,2个三角形的顶角度数不断增加,2个等腰三角形的腰长不断变长,但根系分布的这种基本模式不变。在同一生育期,苏绿1号绿豆的顶角度数明显大于江浦永宁绿豆。说明,苏绿1号的根系发育呈横向型,江浦永宁绿豆的根系发育呈纵向型。根系鲜重增加的最快时间是分枝期到开花期,且苏绿1号绿豆根系的定型时间早于江浦永宁绿豆。可见,绿豆生长中后期,在栽培上保护好苏绿1号绿豆的根系显得尤为重要。伤流量测定表明,苏绿1号绿豆的根系活力明显强于江浦永宁绿豆。

Comparison of Root Developmental Characteristic between Different Podding Type Mungbean

The mungbean varieties Sulu No.1 which is determined podding type(DPT) and Jiangpuyongning mungbean which is indetermined podding type(IDPTF) were compared on the root system developmental biological differences under three growth environments in 2008.The results indicated that the mungbean root system was a compound of two circular cones,and its vertical section was a compound of two isosceles triangle,upper isosceles triangle being vertex angle upward,under isosceles triangle being vertex angle downward,a...