지베렐린과 요소(尿素)의 처리(處理)가 상수(桑樹)의 수량(收量) 및 잠아(蠶兒)의 실용형질(實用形質)에 미치는 영향(影響) = Influence of Gibberellin and Urea treatment on the Production of mulberry Leaf and characteristic of silkworm

국문 초록 (Abstract)

본시험은 GB과 Urea를 상엽에 복합 처리하였을 때 상수의 발육 및 처리상엽을 결여한 잠아의 실용형질에 미치는 영향과 GB를 단일 처리한 상엽을 결여하였을 때 잠아의 실용형질을 구명하기 위하여 실시한 결과 다음과 같은 성과를 얻었다. 1. 상수 가. 춘잠기에는 GB+Urea를 복합 처리한 것이 주당 엽중이 가장 무거웠으며 무처리구에 비하여 수엽량이 7％ 증수되었다. 나. 추잠기에는 GB와 Urea를 각각 단일 처리한 것과 GB＋Urea를 복합 처리한 것이 무처리구보다 지조장, 엽장 및 엽폭이 컸으며 수량도 많았다. 그러나 GB을 단일 처리한 것이 지조장 1.000m 당의 엽량이 가장 적었다. 다. 각처리별 상엽의 성분에 있어서는 GB과 Urea를 단일 처리한 것과 GB과 Urea를 복합 처리한 것이 무처리구보다 수분과 조단백질이 약간 많았으나 건물과 탄수화물은 약간 적었다. 2. 춘잠기 잠아성장 가. 감잠비율에 있어서는 4,5령구 공히 GB+Urea 복합처리구가 높았고 화용비율은 4령구에서 다른 처리구보다 적었다. 나. 기잠대 1만두수잠량은 4,5령구 공히 복합처리구에 큰 차는 없었으나 GB 단일처리구가 다른 처리구보다 약간 많은 경향이었다. 다. 견증비율은 각처리구간에 유의차는 없었으나 4령구가 5령구에 비하여 약간 높았다. 3. 추잠기 잠아성장 가. 감잠비율은 무처리구와 Urea를 단일 처리한 것이 GB+Urea 복합 처리한 것과 GB를 단일처리 한 것보다 낮았다. 나. 화용비율에 있어서는 Urea 단일처리가 GB+Urea 복합 처리한 것보다 높았으며 다른 처리간에는 유의차가 없었다. 다. 대 4령구잠 1만두수견량은 Urea 처리구가 무처리구, GB+Urea 복합처리구, GB 단일처리구보다 많았다. 라. 견증비율을 각 처리간에 유의차가 없었다.

다국어 초록 (Multilingual Abstract)

This study was conducted investigate the effect of Gibberellin and Urea on the growth of mulberry tree with the compound treatment, and the characteristic of silkworm when the mulberry leaves simply treated with GB and the compound treatment with GB and Urea were supplied. The results are as follows. 1. Mulberry tree A. The leaf weight per mulberry tree with the compound treatment of GB+Urea was heavier in spring silkworm and the leaf yield was increased by 7% compared with the non-treatment plot. B. The growth of wattle, leaf length and leaf width was more accelerated in the compound treatment plot of GB+Urea, the single treatment plot of GB and Urea than the non-treatment plot in autumn silkworm, and there was observed an incredse yielding effect of 16% in GB+Urea plot, in 16% GB plot and 18% in Urea plot respectively as compared with the non-treatment plot, hut yield per 1000m unit of wattle length was the least in GB plot. C. In the composition of mulberry leaves of treatment, water and crude protein was increased in the compound treatment plot of GB+Urea and the single treatment plot of GB and Urea than the non-treatment plot, but dry matter and carbohydrate were decredsed. 2. Characteristics of Larva in spring silkworm A. The mortality ratio of 4 and 5 instar plot was equally high in the compound treatment plot of GB+Urea and the pupation ratio of 4 instar plot was lower than other treatment plot. B. Although there was no significant difference observed in the cocoon weight of 10.000 1st-day worms in both 4 and 5 instar plots between each treatment plot, the single treatment plot of GB showed somewhat great than other treatment plots. C. There was no significant difference observed in the cocoon layer ratio between each treatment plot, but 4 instar plots was slightly higher than 5 instar plots. 3. Characteristics of Larva in Autumn silkworm A. The mortality ratio of the compound treatment plot of GB+Urea and GB was higher than that of the nontreatment and single treatment plot of Urea. B. The pupation ratio of the single treatment plot of Urea was higher than that of the compound treatment plot of GB+Urea, and there was no significant difference observed between other treatment plot. C. The cocoon weight of 10.000 1st-day 4th instar worms was heavier in the single treatment plot of Urea than nontreatment plot, GB+Urea plot and GB plot. D. The cocoon layer ratio was no significant difference observed between each-treatment.