不同树龄桐花树根系生长和根系活力的比较研究  

A Comparative Study of Root Growth and Root Activity of Different Ages of Aegiceras corniculatum

作　　者：刁俊明[1] 曾宪录[1] 陈桂珠[2] 

机构地区：[1]嘉应学院生命科学学院,广东梅州514015 [2]中山大学环境科学与工程学院,广州510275

出　　处：《中国农学通报》2014年第25期24-27,共4页Chinese Agricultural Science Bulletin

基　　金：广东省科技计划项目"红树植物桐花树治理城乡河涌污染的技术研究与应用"(2010B031900044)

摘　　要：为探索树龄对根系生长和根系活力的影响,以1年龄和2年龄桐花树为试验材料,对不同树龄桐花树(Aegiceras corniculatum)根系生长和根系活力进行比较研究。结果表明:处理360天后,2种树龄的桐花树年生物量均有增加,2年龄单株生物量是1年龄的2.45倍。根生物量在单株生物量中所占的比重,随着树龄的递增呈减小趋势。1年龄根数、根长和根粗的年增量均显著大于2年龄的;两者的根系含水量均呈先升后降的趋势,2年龄根系活力较1年龄的相对稳定些。试验表明,不同树龄的桐花树根系生长和根系活力有显著差异。The root growth and root activity of 1 a and 2 a Aegiceras corniculatum plants were compared to investigate the effect of plant age on the root growth characteristics. The results showed that, after 360 d of growth, the single plant biomass of 2 a plants Aegiceras corniculatum was 2.45 times that of the 1 a plants. The proportion of the root biomass to the whole plant biomass decreased with the increase of plant age. The annual increase of root number, root length and root diameter of 1 a plants were significantly larger than those of 2 a plants; the root water content showed a trend of first rising then declining; the 2 a plants had relatively more stable root activity than the 1 a plants. Overall, significant differences existed between different ages of Aegiceras corniculatum in the root growth and activity.

关 键 词：桐花树 不同树龄 根系生长 根系活力 

分 类 号：Q945.1[生物学—植物学]