木麻黄接种弗兰克氏菌海藻酸钙菌剂大田试验研究

Study on the Inoculation Effects of Field grown Casuarina equisetifolia with Frankia Alginate Beads

在广东省西部的阳西县、东部惠来县和中部台山市的滨海沙丘进行木麻黄接种弗兰克氏菌海藻酸钙菌剂的大田试验。结果表明:接菌树木的高生长比对照增加6.6%～53.1%,胸径增加16.8%～45.9%;叶片的N含量增加18.1%～40.2%;土壤营养元素除了K比造林前降低外,其余均增加64.3%～249.9%,其中速效N增加最多;根际土壤弗兰克氏菌数量增加277.4%。接菌效果可以持续到造林后第4年,但在第2年时效果最好,增加的幅度最大。不同的弗兰克氏菌在不同地点的接种效果存在差异。

A large scale field experiments were carried out in coastal sandy areas of Yangxi,Huilai and Taishan of Guangdong Province,to evaluate the inoculation effects of Casuarina equisetifolia with Frankia alginate beads.Results showed that tree height,tree diameter at 1.3 m height,N content and Frankia quantity in inoculated trees increased by 6.6%～ 53.1%, 16.8%～45.9%,18.1%～40.2% and 277.4% respectively than those of uninoculated trees.Soil nutrients except K increased by 64.3%～249.9% compared with those of before afforestation. The inoculation effects could maintained to the 4th year but was much higher in the 2nd year than in the 1st,3rd and 4th year.The response to inoculation displayed distinct differences among sites and Frankia strains.