黄连木天然群体果实含油率的地理变异

采用核磁共振(NMR)技术,对我国黄连木分布区9个天然群体果实含油率进行取样测定.结果表明:果实、种子和果肉含油率分别为36.183%,26.594%,50.503%,不同群体间差异显著,群体平均表型分化系数达到92.08%,果实含油率存在地理变异.系统聚类分析将黄连木群体分为低变异中等含油率群体、低变异低含油率群体、高变异高含油群体3类.果实含油率与原产地的经度、纬度和生态梯度值的相关关系表明:黄连木果实含油率呈东北-西南由低到高的地理变异走向,经纬度高的地区黄连木果实含油率低于经纬度低的地区.种子和果肉含油率与生态因子也表现相似的变异趋势,但对生态因子的反映更为迟钝.  

工业人工林经营理论与实践──进展与问题

工业人工林以其能有效地缓解工业用材不足日益受到广泛关注，综述了近几十年来国内外工业人工林的研究成果；分析评价了在工业人工林的概念、特征、发展背景与条件等方面所取得的研究进展；指出工业人工林经营与发展的实践中所面临的问题；展望了工业人工林的发展趋势；提出我国应加强工业人工林技术经济评价研究、提高经营管理水工的对策性建议。  

增广随机区组设计在肉桂苗期测定中的应用

１试验地概况试验地设在金山林场工区一山腰处的一块狭长农田里。表土层厚，原生植被为常绿阔叶林或针阔混交林，枯枝落叶层较厚，理化性状较好，肥沃湿润，适合于肉桂生长。２材料与方法２．１试验材料试验材料来自华安金山林场肉桂人工林的１年生子代。在试验设计中，测...  

肉桂多性状综合选优的研究

Based on the investigation and analysis in 25 - year- old Cinnamomum cassia Presl, the relative chiefvalue was defined, both the criteria and method of multi - characters selection was put forward. In the meanwhile,plus tree was classified according to them. The selection results were analysed and discussed.  

中国竹类生物质能源开发利用及前景展望

目前世界面临着能源短缺和环境保护的双重压力,大力开发生物质能源是实现经济社会可持续发展的必然选择.文中对竹类植物作为一种全新的可再生能源资源的开发现状、利用途径进行探讨,分析了在我国发展竹类生物质能源具有资源丰富、土地充足、市场巨大、政策支持等优势.同时针对竹类能源产业化所面临的问题,提出竹类生物质能源发展的对策,并展望竹类能源产业的发展前景.  

不同种源蒙古栎种子表型性状与淀粉含量的变异分析

The study aims at compare and analyze the variation pattern of the phenotype characters and starch content of Quercus mongolica seed of different provenances. The length, width, length/width ratio, single kernel weight of Q. mongolica seeds from 16 natural distribution regions in China were measured and analyzed. The results showed that there were extremely significant differences among seeds from different region in seed characters. The length and width of seeds ranged from 14.76 mm to 21.08 mm and from 11.87 mm to 15.31 mm, respectively. The length/width ratio of seeds ranged from 1.21 to 1.49. The single kernel weight ranged from 0.60 g to 1.78 g and the contents of starch ranged from 4.42 g·kg^-1 to 5.48 g·kg^-1. The length of seeds has a extremely significant positive correlation with the width and weight of seed, and the width of seed had a significant positive correlation with the weight of seed. The seed width has a significant positive correlation with contents of starch. The width of seeds had a significant negative correlation with altitude, and had a positive correlation with July’s mean temperature. The weight of seed had a significant positive correlation with July's mean temperature too. The correlation of the other phenotypic character and starch content of Q. mongolica seed to geographical climate factors was not significant. According to the results of cluster analysis, sixteen Q. mongolica provenances could be divided into three groups with big fruit and high starch content, middle fruit and starch content, small fruit and low starch content, in which the provenances from Dailing of Heilongjiang Province, Benxi of Liaoning Province and Dayangshu of Inner Mongolia were the superior provenances.  

工业人工林经营理论与实践——进展与问题

工业人工林以其能有效地缓解工业用材不足而日益受到广泛关注 ,本文综述了近几十年来国内外工业人工林的研究成果 ;分析评价了在工业人工林的概念、特征、发展背景与条件等方面所取得的研究进展 ;指出了在工业人工林经营与发展的实践中所面临的问题 ;展望了工业人工林的发展趋势 ;并提出了我国应加强工业人工林技术经济评价研究、提高经营水平的对策性建议。  

黄连木天然群体表型变异与多样性研究

以11个黄连木天然群体为试材,对18个表型性状的变异与多样性进行分析,结果表明:黄连木表型性状存在极其丰富的群体间和群体内变异,各性状间的变异系数相差较大,变幅为4.249%~27.31%,果实性状的变异系数最小,受较高的遗传控制。群体间平均表型分化系数VST为22.27%,说明群体内变异是黄连木遗传变异的主要来源,采用聚类分析的方法,把11个群体分为4类,表型性状与地理气候因子相关分析表明除百果重、千粒重、种长几个性状外,多数表型性状随地理位置的改变没有明显的变化,但有随着经度、纬度的增加而逐渐增大趋势。  

湖北竹亚科植物地理分布区划研究

根据竹亚科植物的地理分布规律和气候区划,将隶属于2个中国竹区的湖北竹林分为4个竹区、8个亚区,并深入研究了各个竹区的植物地理特征、竹类区系特征和竹林经营策略.  

湖北竹类的气候区划研究

根据气候相似性和地域差异性原理,选择湖北76个县(市区)的与竹相关的16个气候因子,进行主成分分析和聚类分析,绘制散点图,从而确定三大区划界线,将隶属于2个中国竹区的湖北竹林分为4个竹区、8个亚区。