ケイ酸入り牡蠣殻石灰粒状肥料の水稲施肥試験
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概要
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[Synopsis] The granular fertilizer made of silicate and oyster sell powder was evaluated the efficacy by application for rice production in the paddy field experiment. The fertilizer was formulated oyster sell powder and silicate using granulator during spray a lignin solution as binder to ingredient powder. Finally, the granular fertilizer contents 1~2% water, 40% CaO, 3% SiO_2 and the particle size is 1~2 mm. The experimental setting was along with conventional rice production in Nara Pref. Japan. The minerals in the rice plants and paddy soils were measured by ion chromatography and ICP. The time before harvesting, the rice plant growth was slightly increased their growth and SPAD value, indicated a density of green color in leaves by the application. And the yield was increased to ca. 20% compared with control rice yield and root growth was a little better than control. But, the size of rice grain was a little smaller than control. The mineral content of rice grain and straw were not significantly different in this test. It is expected that the granular fertilizer application maybe increase rice grain yield in traditional rice production.
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