システム施肥法による良食味米・高位安定生産 : 生育・栄養診断基準の策定

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Studies were carried to develop a method of sustainable production of a high quality rice based on the combination method of fertilizer application in Koshihikari. 1) The palatability was controlled by the nitrogen content in brwon rice and it was low when the nitrogen content in brown rice exceeded 14 g kg^-1. 2) The nitrogen content in brwon rice was controlled by the amount of nitrogen in the plants and the numbers of grains per square meter. There was a close correlation between the palatability and the amylographic characteristics of milled rice besides the nitrogen content in brown rice. 3) The nitrogen content in brown rice was affected by the amount of carbohydrate in the plants until the heading stage, and the relationship between the increase in grain weight per grain and the amount of nitrogen accumulated in grain per grain during the ripening period. 4) Control of the amount of nitrogen at the respective growth stage to sustainable production of a high quality rice was determined depending on the soil groups and the number of grains per square meter. On the unfavorable weather condition, it is important to control the number of grains in addition to the amount of nitrogen at the respective growth stage. The number of grains per square meter was estimated from measurement of leaf color and the number of tillers. Based on the results, it is considered that if meteorological variation is forcasted at the respective growth stage and the appropriate pattern of nitrogen absorption based on the diagnosis of growth and nutrition status is controlled, it may become possible to achive sustainable production of a high quality rice based on the combination method of fertilizer application.
社団法人日本土壌肥料学会の論文
1995-04-05

システム施肥法による良食味米・高位安定生産 : 生育・栄養診断基準の策定

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