论文部分内容阅读
良种是林木速生丰产优质的物质基础,雷州林业局自六十年代初期,就开始了有组织、有计划的良种选育工作。选育并推广了生长迅速、干型通直的雷林1号桉等天然杂交良种。进入七十年代后,对主要的造林树种:隆缘桉、柠檬桉、雷林1号桉等进行了选优,并对所选出的优树进行了繁殖,现将无性繁殖和有性杂交育种工作初报如后: 一、桉树的扦插
Seeds are the material basis for fast-growing, high-yielding and high-quality trees. Since the early 1960s, Leizhou Forestry Bureau has started the organized and planned breeding of elite seeds. Breeding and promotion of rapid growth, stem straight through the Laurel No. 1 eucalyptus and other natural hybrids. After entering the seventies, the main afforestation tree species: Eucalyptus grandis, Eucalyptus citriodon, Eucalyptus eucalyptus, etc. were selected, and the selected tree has been bred, now the clonal and sexual hybrids Breeding work reported as follows: First, the cutting of eucalyptus