摘要
为研究桉树的微营养,在花岗岩发育的严重水土流失立地上开展了尾叶桉施肥试验.结果表明:微量元素的缺乏不同程度地影响了尾叶桉的生长,特别是硼素的缺乏.在施用大量元素肥料的同时,硼的添加使得尾叶桉生长显著加快;4 5年生时,全素肥料处理的尾叶桉胸径、树高生长是缺硼处理的2 30 2 %和173 5 % .在不添加硼素的情况下,不仅严重影响了生长,同时表现出典型的硼素缺乏症状:枝条组织坏死成肿瘤状,叶腋间可见丛状腋芽。
A fertilizer experiment was carried out to study the effects of micronutrients on the growth of Eucalyptus urophylla on a seriously eroded hilly land where soils are developed from granite. Results showed that deficiency of micronutrients had a negative effect on tree growth of E. urophylla incoordinately, especially while boron (B) was absent. Tree height and DBH growth under all nutrients treatment had 73.5% and 130.2% higher than those in the B deficient treatment at 4.5 years after planting, respectively. Without B application, tree grew very slowly and had very typical B deficient symptoms, such as bad tissue of young branches, emergence of multiple buds in axillary, and unusual growth of stems and branches.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2005年第2期91-94,共4页
Journal of South China Agricultural University
基金
国家自然科学基金资助项目 (396 30 2 4 )
广东省水利厅科研项目"高效水土保持林营建及植被恢复技术的研究"的内容之一
关键词
微量元素
硼
尾叶桉
缺素症
幼林
生长
micronutrients
boron
Eucalyptus urophylla
deficient symptoms
