摘要
对北非雪松5个种源1年生播种苗的苗高和地径生长进行研究,5个种源的苗高都符合"S"型生长曲线,苗高生长可采用Logistic生长曲线拟合,同时可把生长期划分为4个阶段;地径生长规律与苗高生长不同,Logistic生长曲线拟合程度不高,不能作为生长期划分的依据。5个种源的苗高和地径生长规律相似,但苗高和地径生长量存在显著差异,美国加利福尼亚种源和亚利桑那种源苗高、地径生长量均高于突尼斯、阿尔及利亚和摩洛哥种源。
Annual growth rhythm of Cedrus atlantica Manetti seedlings from five provenances were studied in this paper. The results showed that the growth patterns of height of five provenances were similar to ＇S＇ curves and could be fitted with Lo- gistic equation. And by equation the four stages could be devided for the height diameter; while the ground diameter is different from the height diameter,and the Logistic fitting degree is not high,so we could not derided the growth stages by the ground diameter. The rhythm of the height and ground of the Cedrus atlantica Manetti seedlings five provenances were same, hut the growth have the siginificant differences, the height and the ground diameter of the seedings from California and Arizna of the The Unites States are better than the seedings from Tunisia, Algeria and Morocco.
出处
《山东林业科技》
2012年第4期1-4,共4页
Journal of Shandong Forestry Science and Technology
基金
国家948项目(2008-4-12)
关键词
北非雪松
种源
年生长规律
Cedrus atlantica Manetti
Provenances~ Annual growth rhythm
