论文部分内容阅读
在紫色砂岩发育的严重侵蚀红壤上，开展尾叶桉施肥试验。结果表明，ＮＰＫ复合肥的施用，明显地促进了尾叶桉的生长，但在未加人微量元素肥料的情况下，表现出明显的微量元素缺乏病症，致使尾叶桉分生组织畸变，上部枝条折断，成丛生状，顶端优势不明显。２０个月生时，ＮＰＫ＋微肥处理的树高和胸径，与ＮＰＫ处理的相比较，分别提高５４．３％和１０４．９％，是对照无肥处理的３．６４倍和１．５８倍，表现出极显著的微量元素施肥效果。
In purple sandstone developed serious erosion of red soil, to carry out the Eucalyptus urophylla fertilization test. The results showed that the application of NPK compound fertilizer obviously promoted the growth of Eucalyptus urophylla, but showed obvious trace element deficiency when the trace element fertilizer was not added, resulting in the aberration of the meristem of Eucalyptus urophylla, Broken branches, into clusters, the top edge is not obvious. At 20 months of age, tree height and DBH of NPK + fertilizers increased by 54.3% and 104.9%, respectively, compared with NPK treatments, which were 3.64 and 1.58 times higher than that of control and no fertilizer treatments , Showing extremely significant trace element fertilization effect.