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木麻黄不同家系种子品质及幼苗生长研究∗
李汉东1, 凡鹏2, 谢雪帆3, 丁小龙1, 张燕婷4, 陈俊廷2, 王明怀2, 许秀玉2
1.惠东县林业技术推广站;2.广东省林业科学研究院;3.惠东县生态公益林管理站;4.惠东县森林病虫害防治检疫站
摘要:
为了综合评价木麻黄 Casuarina equisetifolia 家系种子品质并揭示种子特性、 变异规律等对苗期 生长的影响, 对 9 个家系 (湛江采种母树林) 种子形态、 千粒重、 发芽特性、 田间出苗率、 育苗成活率 和苗期生长量 (6 月龄、 14 月龄) 进行测定分析。 研究表明, 木麻黄种子形态性状、 千粒重 (1. 020 ~ 1. 872 g)、 发芽率 (2. 7% ~67. 3%)、 发芽势 (1. 3% ~ 66. 0%)、 发芽指数 (0. 26 ~ 10. 24) 及田间出苗率 (2. 5% ~24. 4%) 在家系间均达到极显著差异水平 (P＜0. 01), 种子发芽率与发芽势、 发芽指数呈显著 正相关 (P＜0. 05), 千粒重与种子形态、 发芽率、 发芽势、 发芽指数呈极显著正相关 (P＜0. 01), 与育 苗成活率、 苗期生长量相关不显著, GD20、 GD22、 GD23 这 3 个家系千粒重较大, 发芽率较高, 发芽迅 速、 整齐, 苗期生长较快, 可作为木麻黄育苗的首选家系。
关键词:  木麻黄  家系  播种品质  苗期生长  种子发芽  
DOI：
分类号:
基金项目:2023 年度广东省自然资源事务专项资金—生态林业建设项目计划 “新一代木麻黄育种群体构建与评价”
Study on Seed Quality and Seedling Growth of Different Families of Casuarina equisetifolia
LI Handong1, FAN Peng2, XIE Xuefan3, DING Xiaolong1, ZHANG Yanting4, CHEN Juntin2, WANG Minghuai2, XU Xiuyu2
1.Huidong Forestry Technical promotion station;2.Guangdong Academy of Forestry;3.Huidong Ecological Public Welfare Forestry Station;4.Huidong Forest Pest Control and Quarantine Station
Abstract:
To comprehensively evaluate the seed quality of excellent families of Casuarina equisetifolia and to reveal the impact of seed characteristics and variation patterns on seedling growth, the seed morphological characteristics, thousand - seed weight, germination traits, field emergence rate, seedling survival rate, and seedling growth from nine families (collected from the mother tree forest in Zhanjiang) were measured and analyzed. The study revealed that seed morphological traits, thousand-seed weight (1. 020 g to 1. 872 g), germination rate ( 2. 7% to 67. 3%), germination potential ( 1. 3% to 66. 0%), germination index ( 0. 26 to 10. 24), and field emergence rate (2. 5% to 24. 4%) all showed extremely significant differences among families (P＜0. 01). The germination rate was positively and significantly correlated with germination potential and germination index (P ＜ 0. 05). The thousand - seed weight was significantly positively correlated with seed morphology, germination rate, germination potential, and germination index (P＜0. 01), but not significantly correlated with seedling survival rate and seedling growth. The families GD20, GD22, and GD23 had heavier thousand - seed weight and higher germination rates, rapid and uniform germination, and faster seedling growth, which can be used as the preferred families for C. equisetifolia seedling cultivation.
Key words:  Casuarina  families  seed sowing quality  seedling growth  seed germination