【摘要】 以伞房属(Corymbia)4个锯材树种为研究对象,进行播种育苗,然后统计小苗出土率、苗高和地径,并结合种源地的地理信息进行分析。结果表明,参试的23个种源间小苗出土率差异明显;种源间苗高、地径的差异均达到极显著水平。斑皮柠檬桉(Corymbia cltriodora ssp.variegata)的种源20756的苗高表现最突出,苗高为17.79 cm,显著高于其他种源;大叶斑皮桉(Corymbia henryi)的种源21040和柠檬桉(Corymbia cltriodora)的种源19693的地径表现最突出,地径≧2.0 cm。相关分析表明,苗高与地径呈现出极显著的正相关关系;苗高、地径与小苗出土率呈极显著的负相关关系,与经度、纬度和海拔呈正相关关系,其中地径与经度、纬度和海拔高度达显著或极显著相关关系;小苗出土率与经度、纬度和海拔高度均呈现出负相关。更多还原

【Abstract】 Taking seedlings of 4 sawn timber species of Corymbia as the studied materials,the seedling unearthed rate,seedling height and ground diameter were recorded after sowing and nursery,and analyzed with the geographic information of source region.The results showed that there was significant difference in the seedling unearthed rate among 23 provenances,and there were extremely significant differences in the height of seedling and ground diameter.The seedling height of provenance 20756 from Corymbia cltriodora ssp.variegata was higher than that of other provenances,which was 17.79 cm.The ground diameter s of provenance 21040 from Corymbia henryi and 19693 from Corymbia cltriodora were larger than 2.0 cm,which was higher than that of other provenances.After correlation analysis,it was found that there was significant positive correlation between seedling height and ground diameter.The seedling height and ground diameter had significant negative correlation with seedling unearthed rate,and had positive correlation with longitude,latitude,and altitude.The ground diameter had extremely si gnificant positive correlation with longitude,latitude,altitude.The longitude,latitude,and altitude had negative correlation with seedling unearthed rate.更多还原