被覆肥料利用による畑地からの肥料窒素溶脱抑制

概要

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Nitrogen balance was measured in a lysimeter experiment to clarify the effect of using coated fertilizer on nitrate leaching. The amount of leaching water was increased in proportion to precipitation, and the ratio of leaching water to precipitation decreased during the active growth stage. The tuber yields of taro plants in the sandy soil increased by the use of coated fertilizer, but no remarkable effect of the coated fertilizer was observed in the Ando soil. The yields of unhulled rice were smaller and the straw weights were larger in the fields using the coated fertilizer for both sandy and Ando soils. Nitrogen uptake by taro and upland rice was increased by use of the coated fertilizer in the sandy soil, but no difference was found between the fields with conventional and coated fertilizer applications in the Ando soil. Nitrate leaching was suppressed by the use of coated fertilizer in both Ando and sandy soils.
社団法人日本土壌肥料学会の論文
1997-08-05