The photosynthetic rate was positive interrelated with the chlorophyll content in rice leaf during different leaf-age or at different leaf-order.
不同叶龄或不同叶位稻叶的光合速率与叶绿素含量成正相关。
In 1984-1985, the root activities with leaf-age-progress was investigated in different rice varieties cultivated in nutrient solution and in field.
1985年，研究了群体水培和大田栽培条件下水稻不同类型品种根系活力的叶龄进程。
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