遮光이 葡萄 Campbell Early 品種의 生育에 미치는 影響 = Effect of Shading on Growth and Development in Grape (Vitis labruscana L cv. 'Campbell Early')

다국어 초록 (Multilingual Abstract)

In order to study the effects of shading on the growth and development in grape Campbell Early, three shading time (two weeks before full bloom, full bloom, two weeks after full bloom) and different shading levels (0%, 15%, 35%, 50%, 70%) were treated ;
The shoot growth(shoot length, diameter, and leaf length, width, area) were reduced as the shading time and levels were earlier and more intensity. the cluster growth had a similar trend.
The fresh weight, cluster weight of berries, vertical diameter and soluble solid were decreased when shading time and levels were earlier and more intensity, but the acidity was increased.
The rate of berry setting at the treatment of two weeks after full bloom or 15percent shading was higher than of that other treatments, with averaged values of 46.7% and 57.3%, respectively. The values above 35 percent shading plots were half of the control.
The Chlorophyll content at the treatment of two weeks before full bloom or 35 percent shading was slightly higher than that of other treatments, but the values were not different among treatments.
The nitrogen content was increased as earlier time and more intensity of shading, but the amount of K, Ca, Mg and Fe were decreased.