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Ethephon과 Gibberellin處理가 Concord葡萄 休眠揷穗의 生長과 가지內 貯藏窒素의 變化에 미치는 影響
高光出,姜性模,John S. Titus 서울大學校 農科大學 1981 서울대농학연구지 Vol.6 No.1
The study was carried out to know bud sprouting, shoot growth and total nitrogen of the dormant Concord grape cuttings treated by Ethephon and Gibberlin and assay extractable protein in the dormant canes and August leaves. The results are as follows. 1. Bud sprouting rate of Concord grape cuttings treated Ethephon 10ppm on December 20 was 80% but the rates of untreatment and GA 10ppm were 10~15%. 2. The sprouting rate and shoot growth treated Ethephon on January 21 and February 20 Were lower than that on Dec.20. 3. GA treatment retarded the sprouting and shoot growth of the dormant cuttings. 4. Total mitrogen rate of dormant cane was 0.053~0.083%and it in August grape leaves was 0.115%per fresh weight. 5. Extractable protein in dormant cane was 0.053%~0.083% and it in August grape leaves was 0.115% per fresh weight
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(Ⅱ)
柳順昊,朴武彦,高光出 서울대학교농과대학농업개발연구소 1989 서울대농학연구지 Vol.14 No.1
Physical and chemical properties of soils of non-cultivated zone between plant standings were analyzed to elucidate their effects on the internal bark necrosis of dwarf apple tree grown on the newly reclaimed highland. Leaf analysis was also made to seek any relationship between nutritional balance in the leaf and the degree of peeling-off known as self-curing symptom of internal bark necrosis. The orchard of dwarf apple tree was 11 years old and established on Osan sandy loam soil (coarse loamy mesic family of Typic Dystrochrepts). The results are summarized as follows: 1. Roots of the dwarf apple tree were distributed more in horizontal direction than vertical direction and root mass in the soil decreased logarithmically with increase of soil hardness. 2. Available phosphated and boron content of the soils in the non-cultivated zone between plants showed positive correlation with trunk diameter, cannopy width, and fruit setting of the apple tree, while Mg and Mn contents were negatively correlated with cannopy width and fruit setting. 3. Fruit setting rate and size of apple were increased with the degree of bark peeling-off (the symptom of bark necrosis recovery). However, the symptom was not necessarily related to nutrient contents of leaf and branch bark. 4. Soil moisture contents determined in situ one day after the rain-fall varied with sites and the moisture data showed that the higher the moisture content, the lighter the growth retardation and necrosis symptom. 5. Leaf analysis for nutrient contents showed that N, K and Ca were in optimum level, B and P in lower level than optimum, and Mn in excessive level respectively. 6. Organic matter and available phosphate contents of the studied soil were lower than national average value of apple orchard soil. However, potassium content of the soil was higher than the national average.