人工接种弗兰克氏菌的木麻黄幼林施肥效应研究

Study on the Effect of Fertilization on Young Trees of Casuarina Inoculated with Frankia

对人工接种弗兰克氏菌的木麻黄幼林进行施肥效应的研究结果表明 :施肥能显著地提高木麻黄幼林的生长 ,施肥处理的树高和胸径分别比不施肥的增加 0 .8%～ 57.1%和 10 .1%～ 55.3% ;年均材积平均每公顷增长 0 .880 14～ 2 .8170 4 m3 。最佳施肥处理 (配方 )是 N10 0 P2 50 K3 7.5。在人工接种弗兰克氏菌的木麻黄幼林三要素施肥中 ,第 1、2年以 P肥为主要影响因素 ,第 3、4年以 N肥为主要影响因素。施肥的时效性在第 2年为最大肥效时间 ,随着林龄的增加肥效下降。不同施肥处理的叶片

The fertilization experiment for young Casuarina equisetifolia plantation inoculated with Frankia was conducted. The results showed that the effect of fertilization of C. equisetifolia young trees inoculated with Frankia were significant on trees growth ,the mean tree height,DBH and volume for the application fertilizer were 0.8%～57.1%,10.1%～55.3% and 0.880 14～2.817 04 m 3·hm -2 ·a -1 than that of the control treatment (no fertilizer treatment). The optimum recipe were the N 100 P 250 K 37.5 treatment. P fertilizer was a primary factor for growth at the first and second year,N fertilizer was a primary factor for growth at the third and fourth year. The N contents in foliage were also obviously different among the treatments.