摘要
按照生长发育顺序,系统地测定了美国籽粒苋N.01、No.2的株高、茎粗、叶面积系数、单株干物质、净光合生产率和植株含氮量。运用数理统计等方法揭示出:(1)在籽粒苋一生中,株高与茎粗的生长、单株干物质及单株氮素总量的积累均符合“S”型曲线变化规律;(2)植株一生含氮量变化呈Y=1/(a+bx)型曲线;(3)叶面积系数进入峰值前与干物质积累呈高度正相关,含氮量与干物质量高度正相关,单株氮素总量与于物质呈高度正相关,这一研究为栽培该作物提供了理论依据。
According to the different growth and development stages, the plant height, stem size, leaf srea coefficents, per plant dry matter, net photosynethetic productivity and plant N content were tested on two varieties of American amaranth (Amaranthns hypochondriaeus), Nol and No2. Using the way of mathmatical statistics or others, the result indicated that: (l)In the whole growth period the changes of plant height and stem size, the total amounts of dry matter and N per plant can all be described by the logistic model. (2)The changes of plant N content in the whole growth period can be described by the model ,Y= 1/(a+bx). (3)The accumulation of dry matter is significantly positively correlated with leaf area coefficient befor its peak first, highly negative correlated with plant N content and significantly positively with the total amount of N per plant.
出处
《中国草地》
CSCD
1991年第2期25-29,共5页
Grassland of China
