极端干旱区珍稀濒危植物沙冬青人工种群重建研究-中国农学通报.PDFVIP

中国农学通报 2013,29(16): 18-23 Chinese Agricultural Science Bulletin 极端干旱区珍稀濒危植物沙冬青人工种群重建研究 韩生慧，何芳兰，尉秋实，李得禄，张进虎 （甘肃省荒漠化与风沙灾害防治国家重点实验室培育基地/甘肃省治沙研究所，兰州730070） 摘 要：为了探讨极端干旱区珍稀濒危植物沙冬青人工种群重建技术，以苗龄为45 天的沙冬青容器苗为 试验材料，分析研究了不同立地类型、保水措施、建植时间以及灌水频度对其成活率、保苗率以及生长量 的影响。结果表明，在年降雨量为110 mm 条件下沙区（民勤），立地条件、建植时间、保水措施以及灌水 频度对沙冬青容器苗建植后期保苗率以及植株生长量均有极其显著地影响(P ＜0.01) ，同时，立地条件和 建植时间对建植苗成活率也有极显著的影响(P ＜0.01) ；在极端干旱荒漠区，5 月初或9 月初在固定沙丘、 沙化退耕地以及轻度盐碱化退耕地进行沙冬青人工种群重建，成活率均在90% ；沙冬青人工种群建植 后，对建植苗采用覆膜保水措施和建植45 天后适量补水能有效地遏制建植苗后期的死亡率，并能促进 建植快速生长，次年9 月建植种群保苗率高达93% 以上，植株平均高度超过10.00 cm、冠幅大于5.60 cm× 6.10 cm。 关键词：干旱荒漠区；沙冬青；人工种群；成活率；保苗率；生长量 中图分类号：S728.4 文献标志码：A 论文编号：2012-3843 Study on Factors Influencing Artificial Population Reconstruction of Ammopiptanthus mongolicus in Extreme Arid Area Han Shenghui, He Fanglan, Yu Qiushi, Li Delu, Zhang Jinhu (StateKeyLaboratoryBreedingBaseofDesertificationandAeolianSandDisasterCombating/ GansuDesertControlResearchInstitute, Lanzhou 730070) Abstract: In order to discuss the artificial population reconstruction technology of Ammopiptanthus mongolicus in extreme arid area，the 45 days old container seedlings of Ammopiptanthus mongolicus were taken as test materials. Their transplant survival rates, later reservation rates and transplant seedlings growth under different site conditions, water conservation measures, transplanting times and irrigation frequencies were measured and analyzed by one way ANOVA. The results indicated that, in desert area where the years rainfall is about 110 mm (such as Minqin), site condition, planting time, water conservation measure and irrigation frequency had extremely s