水稲の生育に伴う炭水化物の集積過程に関する研究(続報) : 生育相と茎稈内炭水化物の消長

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The authors intend to clarify the relationship between morphological characteristics of rice plant and content of carbohydrates in stems. Plants supplied with different amount of nitrogen have been treated under different photoperiodic conditions in vegetative stage. The growth phase, content of carbohydrates and nitrogen of these samples are compared with plant cultured under normal condition. Results obtained are as follows : (1) Number of leaves on main stem of plant treated under short day condition is diminished and each leaf-blade is short in length. Due to the acceleration of ear formation the heading is hastened by about one month, accordingly, the active period of each leaf from sprouting to the heading is comparatively short. Content of carbohydrates in the stem of these plants is relatively small at the heading time, especially, in the plot where nitrogen is amply supplied. However, due to high nitrogen content of these plants, the assimilating activity is vigorous throughout maturity period. Therefore, content of carbohydrates in culm at maturity is larger than that at heading time in much nitrogen supplied plot. (2) Of plants treated under long day condition, the heading is delayed by about two weeks and leaf-blades on main stem and lower internodes of culm are long. In these plants content of carbohydrates in stem is remarkably large at the heading time, while content of nitrogen is small. But the amount of net assimilation product during maturity period is reduced to nearly nothing. Therefore, in these plots, it may be seen almost the whole amount of carbohydrates in ear is a translocated product stored in stem till the heading time. (3) It may be considered that the content of carbohydrates in stem is mainely affected by the area and activity of upper leaves and the active period of that leaves from sprouting to heading time.
社団法人日本土壌肥料学会の論文
1956-09-05

水稲の生育に伴う炭水化物の集積過程に関する研究(続報) : 生育相と茎稈内炭水化物の消長

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