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잣나무결실에 있어서 구과중의 (毬果中) 쭉정이량의 변이
김상근,정현배,홍종균 ( Sang Keun Chon,Hyun Pae Chung,Jong Kyun Hong ) 한국산림과학회 1984 한국산림과학회지 Vol.65 No.1
The average number of empty seeds per cone on the mature tree was 10.03±0.61. The ratios of empty seeds to total seeds and to full seeds were 7.38±0.35% and 8.42±0.49%, respectively in average. The number of empty seeds per cone and the ratios were varied with the site condition; fruited year, and individual tree. The contribution rates of these sources of variance to the number of empty seeds per cone were respectively 3.50%, 8.06%, and 55.41%. No correlationships were found between the amount of empty seeds in number or ratio and the cone production, and the D.B.H. of mother tree. However, both the number of empty seeds and the ratio of empty seeds to total seeds showed significant positive correlations with the number of 1-year-old cones per tree.