硼配施多种微量元素对桉树生长的效应

针对广东省雷州半岛桉树人工林出现缺素生理病的现象,进行了桉树施硼及配施其它微量元素的田间试验,旨为桉树人工林持续发展提供依据。试验结果表明:(1)单施硼对刚果12号桉W5(Eucalyptus ABL12W5)和尾叶桉U6(Eucalyptus urophyllas U6)均有明显效果,但前者施硼的效果好于后者;(2)硼与铜、锌、铁、锰、钼等配施效果明显好于单施硼,但桉树不同树种对微量元素营养有一定的选择性;硼与铜、锌、铁、锰等配施可使刚果12W5大幅增产,而硼与钼配施对尾叶桉U6生长效应显著;(3)缺硼是诱发雷州半岛桉树缺素生理病的重要原因,施用硼可有效消除雷州半岛桉树垂稍病。

Effect of the application of B combining with other microelement fertilizers on Eucalyptus in Leizhou peninsula

Experiments of the application of microelement B fertilizer combining with other microelement to Eucalyptus were carried out in the field to control the element deficient symptom in Leizhou peninsula of Guangdong province, and provide the theoretical base for sustainable development of Eucalyptus plantation. The results showed that, (1) the effect of single B application on the growth of Euealyptus 12 ABL W5 and Euealyptus urophylla U6 was observed clearly, but the effect of applying B on the former was better than the latter. (2) The application of B combined with other microelement including Cu, Zn, Fe, Mn and Mo had a stronger effect on the growth than the application of single B, indicated a strong pertinence of different Eucalyptus species to different microelement. B combined with Cu, Zn, Fe, Mn could increase yield of Eucalyptus 12 ABL W5, while appropriate application of B and Mo could have significant effect on the growth of Euealyptus urophylla U6. (3) B deficient was a key reason of the deficient symptom of the plantation, and application of B could effectively eliminate the symptom of branches droop in Leizhou peninsula.