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We studied the relationship of Double Layer’sSource-Sink of photosynthetic production and themineral nutrients in rice high yielding cultivation.The experiment was conducted with Yayou 2 in twotypes of soil-water environments, i.e. narrow bedwith dense ditch(NBDD)(the bed was 0. 67 mwide), the ditch 0.26 m wide and 0. 26 m deep),and common paddy field (CPF) having the same irri-