不同配比桉树专用肥对桉树生长及元素吸收的影响

通过外源施加两种目前常用的桉树专用肥A(m(N)∶m(P)∶m(K)=15∶9∶11),B(m(N)∶m(P)∶m(K)=17.6∶7.2∶10.3)以及不施肥作对照,研究巨尾桉DH32-29组培苗植株各部分大量元素的变化.结果表明:1)A肥料能够较好地促进桉树苗高、地径生长;2)A,B两种肥料显著提高桉树各器官对N,P,K的吸收;B肥料对根叶的N、根的P吸收的影响高于A肥料,但是A,B肥料对各器官中K含量的影响差异不显著;3)A,B处理下桉树叶及A处理下桉树根的N,P养分吸收未受限制,而对照和B处理下的桉树根对P的吸收受到限制;4)A肥料对桉树Ca的吸收效果显著,肥料N,P,K配比对桉树Mg的吸收影响不大.

Effects of Different Ratios of Special Fertilizer on Eucalyptus robusta Growth and Absorption of Major Elements

This study was set fertilizer A(m(N) : m(P) : m(K)=15 : 9 : 11),fertilizer B (m(N) : m(P) :m(K)=17.6 : 7.2 : 10.3),no fertilization (control),the changes of elements in each part of Eucalyptus robusta (DH32-29) was discussed. The results showed:1) Fertilizer A positively promoted the growth of Eucalyptus robusta.2) Fertilizers A and B significantly increased the absorption of N,P and K in different organs of Eucalyptus robusta.Fertilizer B had higher effect on N absorption in root and leaves,P absorption in leaves than fertilizer A,but there was no significant difference in K among fertilizer A and B.3)The absorption of N and P in Eucalyptus roots under the treatment of Eucalyptus robusta leaves and A treated with A and B was not limited,while the P absorption of Eucalyptus robusta roots under the control and B treatment was limited.4)The effect was significant at fertilizer A on the Ca absorption of Eucalyptus robusta.But the effect of fertilizer N,P,K ratio on the Mg absorption of Eucalyptus robusta was not significant.