질소원 처리에 따른 버드나무류의 생육초기 반응과 양분 흡수 특성 = Early Growth Response and Nutrient Absorption Characteristics of Willows (Salix sp.) Treated with Nitrogen Source

다국어 초록 (Multilingual Abstract)

The present study was to investigate the growth response and nutrient absorption in three willow species ( Salix gracilistyla , S. koreensis and S. chaenomeloides ) treated with nitrogen source (NH 4 + :NO 3 - rate; 200:0, 150:50, 100:100, 50:150, 200:0) for a period of 90days. The height, dry weight and chlor- ophyll contents of three species of willows were found to be highest at 50:150 (NH 4 + :NO 3 - ) treatment.
NO 3 - -N was more effective than NH 4 + -N in the early growth of three species of willows. The increase in percentage of NO 3 - -N handling, T-N, NO 3 - -N in plant tissue increased. The analysis of C, N and mineral content in various parts revealed that the amounts of C, N, K, Ca and Mg were higher in leaves than those in the stems and the roots. However, the amount of NO 3 - -N and P were higher in roots than those in the leaves and the stems. Salix koreensis was excellent, followed by S. chaenome- loides and S. gracilistyla in absorption of nitrate nitrogen. Higher percentage of NO 3 - -N, the amounts of T-N, NO 3 - -N, P 2 O 5 , K, Na, Ca, and pH in soil were decreased.

참고문헌 (Reference)

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