不同套种模式对油桐生长及其枝叶养分的影响

Effects of different agroforestry patterns on growth and nutrient of branch and leaf of Vernicia fordii

以油桐为供试植物,利用油桐+红薯、油桐+黄豆和油桐+玉米不同套种模式研究其对油桐幼林生长和枝叶全氮、全磷、全钾含量的影响,并通过方差分析和多重比较探讨何种套种模式更能促进油桐生长,以及探明油桐枝和叶养分变化情况。结果表明:不同套种模式间对油桐幼林的树高、地径、分枝数、分枝长度和分枝粗度等生长性状影响存在显著差异,油桐+玉米套种模式更能促进油桐幼林生长,尤其是对油桐的树高及分枝长度2个生长性状影响更大;不同套种模式处理间油桐枝叶全氮、全磷、全钾含量差异极显著,油桐+黄豆套种模式油桐幼林枝叶全氮、全磷、全钾含量相对较高,油桐+红薯套种模式全磷、全钾含量相对较高,油桐+玉米套种模式油桐枝叶全氮、全磷、全钾含量相对较低。

To explore utilization of agroforestry patterns in Vernicia fordii ＋ sweet potato,V. fordii ＋ soybean,V. fordii ＋ maize,effects of agroforestry patterns on growth and total N,total P and total K of branch and leaf of V. fordii were investigated. Additionally,the agroforestry pattern which could prompt faster growth and nutrient difference was studied by means of variance analysis and multiple comparisons. The results showed that there was significant difference in the effects among V. fordii ＋ sweet potato,V. fordii ＋ soybean,V. fordii ＋ maize on height,ground diameter,branches,branches length and diameter of V. fordii. The agroforestry pattern of V. fordii＋ maize promoted faster growth,especially,its effect on height and branch length. There was extremely significant difference in the effects among V. fordii ＋ sweet potato,V. fordii ＋ soybean,V. fordii ＋ maize on total N,total P and total K. The contents of total N,total P and total K were higher in V. fordii ＋ soybean,and the contents of total P and total K were higher in V. fordii ＋ sweet potato,while the contents of total N,total P and total K were low in V. fordii ＋ maize.