We investigated growth stages of rice and protein content of rice cultivar “Koshihikari” in earthquake damaged area. For “Koshihikari” of two earthquake damaged areas and contrast area about the factor which growth process and protein content were investigated. Basic data is soil analysis before rice planting, the amount of spraying, fertilizer time, the kind of quantity, the number of times of fertilization of agricultural chemicals from farming record tables, SPAD value, amount of yield and the grain of rice protein content after harvest. NH4-N,No3-N and soil organic matter was analyzed. Soil organic matter shows a high tendency by Budoukubo. NH4-N shows a high tendency by Hanzougane and in case of NO3-N shows a high tendency by Budoukubo. The average height of grass was Shindouri,Budoukubo,and the turn of Hanzougane. Although transition of a SPAD value was changing almost similarly from the end of July to the middle of September as for Budoukubo and Hanzougane, if the period of maturity comes around, the SPAD value of Hanzougane will fall greatly. The yield of brown rice became the order of Shindouri, Budoukubo,and Hanzougane. Apparent amount of rice nitrogen absorption(plant height, number of tillers and value of SPAD) was correlated with protein of brown rice(r=0.49).
地震被災地におけるコシヒカリの成長経過と米粒内タンパク含有率との関係
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