大豆가 生育함에 따라 發生하는 葉序를 基準으로 하여 葉位別로 加里의 含量을 調査함으로써 장차 大豆의 加里代謝에 對한 基礎的인 硏究資料로 삼으려고 本 實驗을 施行하였다. 資料는 葉位別과 各 榮養素別로 區分하여 比較檢討하였다. 結果는 다음과 같다. 1) 榮養別 加里의 分布 :大豆葉에 있어 生育이 旺盛한 時期인 第一複葉에서, 또한 新葉의 發生은 적지마는 단백질合成 및 탄수화물대사가 활발한 時期인 第五複葉에서 加里의 含有率이 顯著히 높았고 第二複葉에서는 第一複葉에서보다 더 낮은 加里의 含有率을 나타내었는데 이는 第五報에서와 같이 葉이 伸長되고 乾燥量이 增加되었으며 同時에 加里가 成葉에서부터 新葉으로 移動하고 旺盛한 증산작용의 結果 加里의 含有率이 저하되었으리라 생각된다. 또한, 着菜期에 加里의 含有率이 저하된 것은 加里가 種予內로 많이 移動한 結果라고 생각된다. 2) 葉位別 加里의 分布 :窒素 燐酸 加里를 過剩施肥함으로써 加里의 含有率이 높았으며 그 效果는 燐酸을 過剩施肥한 경우에서보다 窒素를 過剩施肥한 경우에서 보다더 顯署한 增加를 나타내었다. 幼植物에서는 燐酸缺乏으로 因한 生育阻害現象을 加里가 어느정도 cover하여 주었으나 生育이 進前됨에 따라 그 效果는 不可能하였다. 三要素中 加里缺乏으로 因한 生育阻害現象이 가장 顯著하였으며 第三複葉 以後에는 新葉의 發生및 分化가 停止되였다. 또한 三要素中 어느 한 要素를 過剩시키고 다른 두 要素를 缺乏시키면 正常的인 生育을 할 수 없었다.

The effect of potassium metabolism on the soybean leaves was studied with comparison of other elements during the successive growing period. The results were as follows; 1. The percentage of potassium content showed remarkable increase not only in the first compound leaf at a stage which was growing vigorously and producing new leaves, but also in the fifth compound leaf at a stage which was taking a active metabolism of nitrogen and carbohydrate but not producing new leaves. However, the percentage of potassium content was decreased in the second compound leaf than in the first one. Such a result could be regarded as a potassium removal from mature leaves into immature and flowing out from stoma through respiration. During the pod-development the percentage of potassium content in the soybean leaf was decreased. 2. If nitrogen, phosphorus and potassium were added excessively in the nutrient solution, the percentage of potassium content in the soybean leaf had increased. The effects of these elements showed a remarkable increase in the excessive plot of nitrogen than in that of phosphorus. At early stage the redtarded effect of phosphorus on the growth of soybean could be covered by potassium, however, at late stage it could not. The growth of soybean plant was much more inhibited by potassium, compared with nitrogen and phosphorus. New leaves could not be produced in the potassium deficient soybean plant after the third compound leaf. The normal growth of soybean plant could not be observed if only one element was excessively added to the culture solution, compared with the deficiency of other two elements.