본시험은 수도 Pot 사경재배로 심경다비조건에서 수도의 형태변화를 일부 시기별로 조사한 결과를 요약하면 다음과 같다. (1) 모든시기에 있어서 엽위별마다 엽신장ㆍ엽신폭ㆍ엽신면적이 심경다비일수록 크게 나타냈다. (2) 출수후의 고엽정도는 심경다비일수록 적었다. (3) 예취기에 있어서 하부로부터의 제1신장절간직경(장경), 제2신장절간장은 심경다비일수록 크고 길다. 그리고 유관속수와 유관속면적도 심경다비일수록 많고 컸다. (4) 예취기에 있어서 지하부의 근수ㆍ평균근장ㆍ근중은 심경다비일수록 크게 나타냈다. 그리고 1근 mg당 근장은 심경다비일수록 기나 근장 1cm당근중은 심경다비일수록 오히려 가볍다.

This experiment was done to observe the morphological change of plant under the cultivation of deep ploughing and heavy fertilization with paddy rice 1963 at Seoul. A seedling of 35 days old was transplanted June 1st, in a galvanized iron pot with botton 20 cm in diameter, which was painted white inside and filled with sand mixed with fertilizers. The treatments were 15cm soil depth of normal fertilization, 30cm of fertilization twice and 45cm of fertilization thrice. Replications were three. The plant was observed on main stem Aug. 6 before heading, Sep. 12 after heading and Oct. 17 at the time of harvest at the same pot. The results are as follows. The length and the width of leaf blades of the upper part on main stem have the tendency to be big and vigorous with the deep ploughing and heavy fertilizations(Fig 1, 2, 3 and 4). The number and the size of vascular bundles of main stem is to increase when the paddy is cultivated with the method of deep ploughing and heavy fertilizations(Fig 5). The number and the weight of roots of main stem increases with deep ploughing and heavy fertilizations(Fig 6).

• 張永哲(건국대학교) | 장영철
• 白壽鳳(건국대학교) | 백수봉