Interaction of Calcium, Potassium and Boron on the Growth of Leaf Lettuce and its Following Crop of Soybean

석탄(石灰), 가리(加里) 및 붕소시용(硼素施用)이 상치와 그 후작(後作) 대두생육(大豆生育)에 미치는 상호효과(相互效果)

The mutual effects of calcium, potassium and boron on the growth of the leaf lettuce and its following crop of soybean in the granite soil were observed. The results obtained were as follows : 1. The yields of leaf lettuce and soybean were greatly increased by the application of calcium. It was observed that the calcium content in soybean leaf correlated positively with the yields, the number of pods and dry weight of soybean. 2. The application of calcium was effective by itself on the plant growth, the Ca+B application was better effective, and the best effective plot was $Ca+B_1+K_1$. 3. No significant tendency was observed between the Ca/B ratio in plant tissue and its growth. 4. The application of boron increased calcium absorption in plant tissue regardless of the application of calcium. 5. The number of pods and 100 grains weight of soybean were increased by the application of boron, And a positive correlation was observed between the boron content in soybean leaf and the number of pods of soybean. 6. One basal application of calcium, potassium and boron was effective both on leaf lettuce and on its following crop of soybean.

화강암(花崗巖)에서 유래(由來)된 신개지토양(新開地土壤)에서 석회(石灰), 가리(加里) 및 붕소시용(硼素施用)이 상치와 그 후작대두(後作大豆)에 미치는 상호효과(相互效果)를 주로 식물영양면(植物榮養面)에서 비교검토(比較檢討)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 석회시용(石灰施用)은 상치 및 대두(大豆)에 현저한 증수효과(增收效果)가 있었고 대두엽중(大豆葉中) Ca함량(含量)은 수량(收量), 협수(莢數) 및 건물중(乾物重)과 정상관(正相關)이 있었다. 2. 석회(石灰)는 단독효과(單獨效果)도 좋았지만 붕소(硼素)와의 병용(倂用)이 더 효과적(效果的)이었으며 가장 효과적(效果的)인 처리(處理)는 $Ca+B+K_1$구(區)였다. 3. 식물생육(植物生育)과 식물체중(植物體中) Ca/B율(率)은 어떠한 경향(傾向)을 보이지 않았다. 4. 붕소시용(硼素施用)은 석회처리구(石灰處理區)는 물론 무석회구(無石灰區)에서도 Ca흡수(吸收)를 증가(增加)시켰다. 5. 붕소(硼素)는 대두(大豆)의 협수(莢數), 100입중(粒重)을 증가(增加)시켰고 대두엽중(大豆葉中) 붕소함량(硼素含量)은 협수(莢數)와 정상관(正相關)을 보였다. 6. 석회(石灰), 가리(加里), 붕소(硼素)의 1회기비(回基肥)는 상치와 후작대두(後作大豆)에까지 효과(效果)가 나타났다.