摘要
采用生长指标、形质指标及生理指标相结合的方法从薄山林场１万余株试验林林木中选出了楸树优良无性系 ──窄冠１号。该种冠窄、速生、丰产、美观。６年生树高６．８ｍ，年平均生长量１．１３ｍ，较全林平均值提高５０．４％；胸径９．７ｃｍ，年均１．６２ｃｍ，较全林提高５０．９％；冠幅１．９ｍ，较全林均值小２４．６％，较林中宽冠单株小４７．２％；冠长４．３ｍ，较全林均值大７９．９％，属林中树冠最窄长的无性系。与林中无性系８６１１对比，窄冠１号平均羊叶叶面积是８６１１的２．５倍，单株叶面积为２．１倍，叶干重增加１５％，光合强度增强２１．９％。７ａ生时，较林中其他无性系的形数提高６．５％～３０．４％，单株材积增加２８，２％～５６．７％。
Zhaiguanensis- 1 is a new variety selected from 6. 66 hm of test plantation ofCatalpa bungei C.A. Mey.( including more than 10 000 trees ) in the Forest Farm ofBoshan. It was characterized by narrow crown,fast growth,high yield,beautiful and so on.In six years ,the tree height reached 6. 8m,the annual mean growth increment was 1. 13m,being 50.4%more than the average value of the whole plantation。 The D.B.H. was9. 7cm,the annual mean growth increment was 1. 62cm,being 50.9%more than that of thewhole plantation. The crown width was 1. 9m, being 24.6%less than that of the wholeplantation , 47.2%less than that of the single tree with broad crown. The crown lengthwas 4. 3m,being 79.9%more than that of the whole plantation。 Compared with clone 8611in the same plantation ,the mean leaf area of single leaf and single tree was2. 5 and 2.1times respectively as much as that of clone 8611. The dry matter weight of the leaf and theintensity of photosynthesis was 15%and 21.9%more than that of clone 8611 ,respective-ly. In seven years,the form-figate was increased by 6.5%～30%compared with that of theclones in the same plantation, and the volume of single tree was increased by 28.2%～56.7%。
出处
《河南农业大学学报》
CAS
CSCD
1994年第2期189-193,共5页
Journal of Henan Agricultural University
关键词
楸树
无性系
窄冠1号
选择
Catalpa bungei
C. A.Mey.
clone
zhaiguanensis─1
selection
