施設および露地カンキツ栽培圃場の養水分の動態 : 高知県香美郡香我美町の事例

概要

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Orange orchards in the greenhouse and the open field in Kagami-cho, Kami-gun, Kochi were monitored in terms of soil moisture and dissolved ions in the soil solution for seven months. Surface and subsurface soils, plant leaves, and the juice of the harvested oranges were also analyzed to evaluate the macro nutrient dynamics between plant and soil. The following two aspects are the key findings to make a prescription for the management of orange orchard both in the greenhouse and the open field : 1)Soil moisture was kept within an appropriate range for the growth of orange trees. 2)In the greenhouse, surface accumulation of phosphorus was conspicuous but this accumulated phosphorus did not necessarily lead to an increase in the amount of phosphorus absorption by the plant. 3)In the open field, an imbalance in the composition of exchangeable cations may cause a nutrient deficiency problem, e.g., a typical symptom due to Mg deficiency was seen in the plant leaves after harvest.
一般社団法人日本土壌肥料学会の論文
1996-02-05