杂交马褂木微肥效益研究

Study on the Benefit of Applying Microelement Fertilizer to Liriodendron chinense ×L. tulipifera

采用锌和钼二次饱和D-最优设计对杂交马褂木(Liriodendron chinense×L.tulipifera)进行微肥效益研究。结果表明,微肥施用解决了顶端优势减弱、老叶缺绿坏死、生长受阻等问题,单施锌肥显著地促进了树高的生长,却对胸径生长没有显著的促进作用,而单施钼肥对促进树高和胸径的生长都没有显著的效果,但两种微肥施用量的合理搭配对促进树高和胸径的生长有显著作用。在建立多元回归方程的基础上模拟仿真寻优,得到杂交马褂木的树高最优产量为4.35 m,每株利润为21.47元,此时最佳肥料用量为每株4.739 g硫酸锌(Zn SO_4·7H_2O)和2.148 g钼酸铵[(NH_4)_6Mo_7O_(24)·4H_2O]。

Zinc and molybdenum quadratic saturation D-optimum design was used to research the benefit of micronutrient fer-tilizer on the Liriosensron chinense×L. tulipifera. The results indicated that the application of micronutrient fertilizer solved the reduced apical dominance,the old leaf chlorotic or necrosis,stunted growth.The growth of tree height was significantly promoted by using single application of zinc fertilizer, but had no effect on DBH growth. While the single application of molybdenum fertilizer had no significantly effect to promote the tree height or DBH growth. With a reasonable amount of two kinds of fer-tilizer application had significant results in promoting the tree height and DBH growth. Multiple regression equation was estab-lished to carry out simulation and optimization, the result showed that the optimal yield of Liriosensron chinense ×L. tulipifer-a tree height was 4.35 m and the corresponding profit per plant was 21.47 yuan. At this point the best amount of fertilizer per plant was 4.739 g zinc sulfate and 2.148 g ammonium molybdate.