论文部分内容阅读
收集我国侧柏分布区内的种源７１个。据在兰州、正宁、两当、张掖等６个试验点历时１４ａ的试验结果表明，种源间生长性状差异显著，山东泰安、河南确山、河北获鹿等优良种源树高、胸径的遗传增益分别为８．８％和１０．３％，选用优良种源造林增益明显。内蒙古、北京、辽宁、山西和陕西一带种源普遍生长较差；太行山、秦岭以东、北京、石家庄以南、淮河流域以北地区种源适应性强、生长速度快，是我省今后侧柏种子调拨的主要范围
Seventy-one provenances in the arborvitae area of China were collected. According to the test results of 14a in Lanzhou, Zhengning, Liangdang and Zhangye, the results showed that there were significant differences in the growth traits between provenances. The tree height, diameter at breast height of Tai’an, Henan Queshan, The genetic gain was 8.8% and 10.3%, respectively, and the good afforestation gain was obvious. The provenance of Inner Mongolia, Beijing, Liaoning, Shanxi and Shaanxi is generally poor. The Taihang Mountains, east of the Qinling Mountains, south of Beijing, Shijiazhuang and north of the Huaihe River basin have strong adaptability and rapid growth. The main range of seed allocation