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栽植時 主幹切斷程度가 生育程度를 달리한 사과苗木 (Fuji/M26/Seedling)의 樹體生長에 미치는 影響
金政培,高光出 서울大學校 農科大學 1987 서울대농학연구지 Vol.12 No.1
One-year-old apple trees of Fuji/M26/Seedling were classified into three groups; not-vigorous, semi-vigorous, and vigorous, according to their scion diameter, headed at heights of 35㎝,50㎝,65㎝,and 80㎝ above the upper union each, and grown for one year. The results obtained were as follows: 1. Heading height was ineffective on the primary rate of bud releasing when the trees were not-vigorous. The heavy pruned trees resulted in higher primary rate of bud releasing when vigorous. 2. The rate of bud released after growth was high in the order of tree vigour;not-vigorous, semi-vigorous, and vigorous. Heading height was ineffective on the rate of bud released. The interaction of vigour and heading height was not significance. 3. The vigorous trees resulted in thicker scion. Heading height was ineffective on the scion diameter. 4. Vigour and heading were ineffective on the number of leaves either. The interaction of vigour and heading height was not significance. 5. Tree vigour was ineffective on the number of shoots. The heavy prunded trees resulted in smaller number of shoots. The number of shoots was large in the order of crotch angle; 31~60。,61~90。, 0~30。,and above 91。 6. Total shoots length was significantly different according to tree vigour. Total shoots were long in the order of vigorous, not-vigorous, and semi-vigorous. Heading height was ineffective on the total shoots length. Total shoots were long in the order of upper part, middle-upper part, middle-lower part, and lower part. 7. Tree vigour was ineffective on the mean shoot length. The heavy pruned trees were larger in mean shoot length. The interaction of vigour and heading height was not significance. 8. The vigorous trees were heavier than semi-vigorous and not-vigorous trees. Heading height was ineffective on the total fresh weight per tree. The interaction of vigour and heading height was not significance. 9. Tree vigour was ineffective on the number of secondary shoots. The heavy pruned trees produced more secondary shoots. 10. Some quadratic multi-regression equations with three elements viz. total fresh weight per tree, scion diameter, and heading height at planting, were calculated. 11. Total shoots length, total fresh weight per tree, and number of leaves were highly and positively correlated with total fresh weight per tree, number of shoots, total shoots length, number of leaves, scion diameter, and number of secondary shoots.
山地 果樹園에서 發生하는 矮性 사과나무의 發育不振과 枯死現象의 原因究明과 對策을 위한 基礎 硏究(I)
高光出,柳順昊,朴武彦 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.1
In order to find out the causes of the growth-retardation by the soil-enviromental and physiologically unbalanced conditions in the dwarf apple trees. relationships between nutrient concentration in leaf and soil growth characters were studied on the combination of three and two varieties of stocks and scions. respectively. in the ten-year-old orchard established on Osan silt loam(Co-arse loamy mesic family of Typic Dystrochrepts). The results are summarized as follows: 1. Basic growth characters representing the past growing history such as tree height canopy width and trunk thickness were remarkably taller broader and thicker in the normal trees than in the retarded ones with physiological abnormal symptom. However yearly changeable growth characters like shoot length number of the fully developed leaves and fruit setting rate were better in abnormal trees in normal ones because of the recent intensive improvement of fertilization for the growth-retarded trees. 2. Basic growth difference between normal and abnormal trees was largest in M26 smallest in MM106. 3. Although the contents of N. P. K. Ca and Mg in leaf were at standard level, two nutrients. B and Mn particulary in the leaf of abnoumal tree, were quite lower and higher, respectively, than the general standard level for the good growth of apple trees. 4. Surface soils had higher pH and nutrient concentration than subsoil because of successive surface fertilization. 5. Growth status was negatively correlated with the concentration of nutrients in soil and leaf because of improper fertilization to have been applied at the same amount of fertilizer regardless of age or vigour of trees. 6. Deep soiling was the most excellent planting method to keep higher concentration of nutrients in leaves and to accelerate the growth of apple trees.