Effects of the Methods of Picking Leaves in Autumn on the Growth of Branchs and the Yield of Mulberry

추잠기의 적엽정도가 지조의 발육과 수량에 미치는 영향

This work was carried out to investigate the effects of several mode of picking leaves in autumn on development and harvest of branches, The results obtained are summarized ： (1) The effects of picking leaves in autumn were more conspicuous in weight of branches in length and/or size of branches. (2) In inverse propotion to the amount of picking leaves in autumn, the total weights of branches showed heavy in the non-picking leaves, the lower half part and the middle part-treatment, whereas are light in the upper half- and the all leaves picking-treatment, In spite of excessive picking leaves in autumn however, the middle part-treatment presented heavy weight of branches. (3) The yield of leaves in spring silkworm rearing, in propotion to the amount of picking leaves, were heavy in order of the non-picking leaves-, the middle part, and the lower half part-treatment, while both the upper half and the all leaves picking-treatment showed small amount of harvest. (4) The total yield of mulberry leaves and shoots of middle part-treatment, which showed the largest number of all was larger than that of the non-picking leaves and the all leave picking-treatment (leaving 5 leaves from upper part of shoot) at the ratio of 36％ and 13％, respectively.

추잠기의 적엽정도가 지조의 수량에 미치는 영향을 알기 위하여 시험을 한 바 다음과 같은 결과를 얻었다. (1) 추기에 있어서의 적엽의 영향은 조장이나 조률과 같은 형태적인 면보다는 조량과 같은 질적인 면에 더 크게 나타나고 있다. 2. 조량은 중간부적엽구를 제외하고는 추잠기의 적엽량과 반비례하여 무적엽구, 불반부적엽구, 중간부적엽구가 크고 상반부적엽구와 전적엽구는 작았는데 중간부적엽구는 추기의 적엽량이 많았는데도 조량이 컸다. (3) 춘잠기의 수량은 조량과 정비례의 관계에 있어 조량이 큰 무적엽구, 중간부적엽구, 하반부적엽구의 순위대로 많았고, 상반부적엽구, 전적엽구의 순으로 적었다. (4) 연간합계수량은 중간부적엽구가 가장 많아서 무적엽구에 비한다면 36％, 가행법인 전적엽구(상단 5잎 남기고)보다는 13％정도 많았다.