为给筛选抗旱性强的油茶优良单株以选育油茶抗旱砧木提供参考依据，以香花油茶、小果油茶、普通油茶、陆川油茶、博白大果油茶和广宁红花油茶这6个油茶物种的1年生实生苗为试材，采用人工控制浇水使土壤自然干旱的方法对其抗旱性进行了试验研究，并对其苗期抗旱性的强弱进行了评价。结果表明：广宁红花油茶的暂时萎蔫系数和永久萎蔫系数分别达到5.09%和3.11%，均显著高于其它油茶物种；而香花油茶的暂时萎蔫系数和永久萎蔫系数均最小，仅分别为2.42%和1.10%；6个油茶物种的抗旱能力由强到弱依次为香花油茶＞小果油茶＞普通油茶＞陆川油茶＞博白大果油茶＞广宁红花油茶；6个物种内不同单株间的抗旱性均存在分离情况，依其永久萎焉系数的大小可将其划分为0%～1%、1%～2%、2%～3%、3%～4%、4%～5%共5种抗旱类型，其中，广宁红花油茶的抗旱类型分布在3～5级之中；博白大果油茶分布在2～4级之中，陆川油茶、普通油茶和小果油茶均仅在2、3级之中有分布，香花油茶只在1、2级之中有分布。

In order to select out some superior individuals with strong drought-resistance and to provide a reference for drought-resistance root stock breeding, taking one-year-old seedlings of six Camellia species as materials, including C. osmantha, C. meiocarpa, C. oleifera, C. vietnamensis, C. gigantocarpa and C. semiserrata, their drought resistance were reached and evaluated through the way of artiifcial control of irrigating to make soil naturally dry. The results show that:temporary wilting coefifcient and wilting coefifcient in C. semiserrata reach up to 5.09%and 3.11%respectively, which are signiifcantly higher than the other species, while the two indexes of C. osmantha are the lowest, just 2.42%and 1.10%respectively. The six Camellia species based on drought resistance from strong to weak in order is C. osmantha, C. meiocarpa, C. oleifera, C. vietnamensis, C. gigantocarpa, C. semiserrata. Drought resistance among individuals within species is in the separation. According to wilting c

为提高油茶保果率,对普通油茶喷施营养元素和植物生长调节剂,结果表明:对于四会普通油茶,各处理方法在0.05水平上差异显著,且10mg/L2,4-D和0.3%尿素的处理保果率最高,都达到63.33%,各处理对果实的影响,对于单果重、横径、果皮厚、籽数、鲜籽重这些指标,部分处理跟空白对照有显著差异,其中德威乐植物营养剂800倍处理单果重和鲜籽重平均值分别是空白对照的2.87、3.13倍;对于广州普通油茶,30mg/L萘乙酸+0.3%尿素处理保果率最高,达63.33%,但各处理方法在0.05水平上差异不显著,各处理对果实的影响,除了横径,其他指标的各处理跟空白对照没有显著差异。

In order to improve the Camellia fruit retention rate, nutrient elements and plant growth regulator were sprayed to Camellia oleifera Abel. The results showed that: the treatment methods had significant differences at 0.05 level for Sihui Camellia oleifera Abel, and the fruit retention rates of 10 mg/L 2,4-D and 0.3% urea treatment were the highest, which reached 63.33%. Effect of different treatments on the fruit, partial treatment had significant differences with blank control for the fruit weight, diameter, thick skin, seeds, fresh seed weight, the average values of fruit weight and fresh seed weight of Deweile plant nutrients 800 times were 2.87, 3.13 times to blank control. For Guangzhou Camellia oleifera, the fruit retention rates of 30 mg/L NAA +0.3% urea treatment was the highest, reached 63.33% , but the treatment methods had no significant differences at 0.05 level. Effect of different treatments on the fruit, each treatment of other index had no significant difference with b

采用组织分离法，对采自广西岑溪市的普通油茶（ Camellia oleifera）和广西宁明县的陆川油茶（ Camellia vietnamensis）叶片和果实中的油茶炭疽菌进行分离，共得到4株油茶炭疽菌。对4株纯化菌株进行了形态学观察和基于rDNA-ITS序列的分子系统发育树分析。结果表明分离自油茶叶片的菌株742、GW2、CR1聚为1组，分离自果实的菌株CRF1单独聚为1组，分离自油茶的4株炭疽菌菌株属于胶孢炭疽菌（ Colletotrichum gloeos-porioides）复合群的种类，有可能为尚未发表的2个新的分类单元。

The Colletotrichum sampled from Camellia oleifera in Cenxi City and Camellia vietnamensis in Ningming city,Guangxi,were isolated via tissue methods and 4 isolates of Colletotrichum were obtained .Mor-phological description and phylogenetic analysis were made based on rDNA ITS sequnces .The results showed that the strains of 742,GW2 and CR1 isolated from leaves were clustered into one group ,and the CRF1 isola-ted from fruit was clustered into another group ,respectively .All the 4 strains belonged to Colletotrichum gloeos-porioides species complex .

介绍了BYJ-800型油茶嫁接机的基本结构和工作原理，着重分析了穗木苗的力学特性，并以此作为穗木切削机构设计的参考因素。应用AnsysWorkbench软件对切刀进行有限元分析和寿命仿真，得到切刀产生应力集中和容易发生结构失效的位置。通过对比普通亚共析钢和Cr12MoV模具钢两种材料的等效应力云图和寿命曲线得出Cr12MoV模具钢具有更高的淬硬性和机械强度，更适合做油茶嫁接机穗木切刀的结论。

The basic structure and working principle of the BYJ-800 camellia grafting machine are introduced, the mechanical properties of the seedlings caspica is analyzed ,as the reference for the design of caspica cutting mechanism. The finite element analysis and the cutter life simulation with the software of Ansys Workbench are completed, the stress concentration of the cutter and the location of the structural failure is analyzed. Contrasting the equivalent stress and the life curve between the sub-eutectoid steel and the mold steel, Cr12MoV tool steel has a higher mechanical strength, which is more suitable cutter for the camellia grafting machine.

为有效延长油茶种子贮藏期限,提供实用的贮藏新方法,以普通油茶种子为材料,采用蜡封、低温冷藏、沙藏和常温贮藏等4种方法贮藏种子,对各种方法处理后种子的发芽率、发芽势、养分含量进行测定和比较。结果表明,在180 d的期限内,采用不同贮藏方法,油茶种子的发芽率、发芽势及种子养分含量不同,贮藏效果差异显著。在4种贮藏方法中,低温冷藏法效果最好,沙藏和蜡封次之,常温法贮藏效果最差,与种子养分含量动态特征表明结果基本一致。因此,规模化超长期贮藏应选择低温冷藏;小批量和短期贮藏可选择沙藏;尽量避免常温贮藏。由于通过蜡封技术处理后的种子,采用常温方式贮藏,其效果与沙藏相当,说明蜡封技术在种子贮藏中具有一定的应用前景,但相关技术体系还有待进一步研究。

In order to effectively prolong storage life of Camellia oleifera seed, and to provide a new practical storage method, C. oleifera seeds were treated by using the four methods of wax-seal storage, storage at low temperature, storage in sand and storage at normal temperature, germination percentage, germination force and nutrient contents of C. oleifera seeds treated were determined and compared. The results show that germination rates, germination forces and nutrient contents of C. oleifera seeds in different storage treatments are different during storage period for180 days, and storage effects have signiifcant differences. In the four kinds of storage methods, storage at low temperature has the best effect, followed by storage in sand and wax seal, and storage at normal temperature has the worst effect, which is consistent with dynamic characteristics of nutrient contents. Therefore, storage at low temperature is suitable for large-scale and ultra-long-term storage, while small quant