主要作物の収量予測に関する研究 : III, 光合成作用を中心とした水稲生育相の解析

概要

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Photosynthetic activity, nitrogen contents, carbohydrate accumulation etc. were studied in rice plants, using variety, Norin 37, grown on a field with different levels of fertilizer application and planting density. The results were as follows. 1) Throughout all of the growing stage, highly positive correlation was observed between total nitrogen content of leaves and photosynthetic activity (Fig. 2). 2) Also an intimate correlation existed between the weight of leaves per plant and photosynthetic activity expect during the growth stages prior to the ear-initiation (Fig. 3). 3) During the ripening stages, associated with the carbohydrate translocation to the ear, nitrogen in the vegetative parts of plant was declined, which in turn caused the decreased photosynthetic activity of the leaves. Consequently nitrogen absorption from the soil during the period after heading was considered to be beneficial for maintaining the photosynthetic activity relatively at a higher level throughout the ripening period.
日本作物学会の論文
1957-12-20