检索结果-南通市图书馆

Soft X ray Diagnosis on Seed Development and Observation on Seed Germination and Seedling Growth in Artificial Hybridization in Cunninghamia and cryptomeria 

引用

Acta Botanica Sinica 1999年第7期41卷 690-694页

作者：李文钿奇文清成小飞胡适宜中国林业科学研究院森林生态环境与保护研究所北京大学生命科学学院

An intergeneric artificial hybridization was conducted between Cunninghamia R. Br. and cryptomeria *** The results are as follows:1. A considerable number of hybrid seeds shed from 76 pollinated cones were empty and a total of 628 looks plump. Soft X ray radiographs showed that, still and all, a majority of the “plump" seeds were embryoless (597, 95.6%) whereas some were partially developed (17,2.7%) and only a few were really full (14, 2.2%). 2. Germination test showed that all of the radiographed hybrid seeds with fully developed embryos were germinable whereas those with partially developed embryos were ungerminable. 3. Physiologically, the growth rate of hypocotyl, the date for shedding of seed coat and spreading of cotyledons, the elongation of epicotyl, and the branching of shoot of the 11 month old seedlings showed a tendency to fall behind those of the female parent; morphologically, the 11 month old hybrid seedlings with linear leaves appeared rather short, slender and weak, whereas the seedlings of the female parents with linear_lanceolate leaves appeared rather tall, stout and strong. 4. It is considered that the hybrid may be true and the crossability reveals a close phylogenetic affinity of Cunninghamia with cryptomeria.

关键词： Cunninghamia cryptomeria Artificial hybridization Soft X ray

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

柳杉(cryptomeria)、台湾杉(Taiwania)和杉木(Cunninghamia)种源的基因型—环境互作(1978年10月在雅加达召开的第八届世界林业代表大会上的报告)

引用

南方林业科学 1979年第3期 27-34页

作者：王启无刘洪谔浙江林学院

总结基因型—环境互作的研究包括了柳杉(cryptomeria japonica)的105个种源、杉木(Cunninghamia lanceolata)的一个种源、峦大杉(*** ***)的一个种源和台湾杉(Taiwania cryptomerioides)的6个种源在1974年营造的7块人工林。这些人工林位... 详细信息

关键词：种源地点柳杉孔雀杉 Taiwania cryptomeria Cunninghamia 台湾杉台湾杉属杉木杉木属环境互作基因型遗传型

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Relationship between stand characteristics and soil properties of two typical forest plantations in the mountainous area of Western Sichuan, China

引用

Journal of Mountain Science 2019年第8期16卷 1816-1832页

作者： YANG Hao MIAO Ning LI Shao-cai MA Rui LIAO Zi-yan WANG Wei-ping SUN Hai-long Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041China

There is uncertainty and limited knowledge regarding stand characteristics and soil properties of middle-aged pure forest plantations in the mountainous area of Western Sichuan. Plantation forests are almost exclusively planted as monocultures in the Pengzhou forest farm in the western mountainous area of Sichuan Province. This study aimed to assess the spatial and ecological characteristics of middle-aged Cunninghamia lanceolata(Lamb.) Hook. and cryptomeria fortunei Hooibr. in the Pengzhou forest farm. The relationships and differences between stand growth characteristics and forest soil composition were assessed on the two forests planted simultaneously within the same area and exposed to the same environmental conditions. Cr. fortunei grew sparse, and slower than Cun. lanceolata. Principal component analysis indicated that the soil properties in the Cr. fortunei plantation were better than those in the Cun. lanceolata plantation. Redundancy analysis revealed that the differences in stand structure were affected significantly by the total nitrogen content and pH value. Thus, we propose that Cr. fortunei is planted for priority consideration in the subtropical high mountain area. Further, tending operations and application of fertilizers need to be conducted in Cun. lanceolata forests. Based on theoretical and experimental data, the present study explains why local farmers are more willing to plant Cr. fortunei, and thus provides a useful theoretical reference for the development of sustainable plantations in the future.

关键词： Planted forest Stand structure Soil properties Cunninghamia lanceolata cryptomeria fortunei Pioneer tree

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：