施P肥和外生菌根菌接种对蓝桉林产量和养分积累的影响  

Effects of Phosphorus Fertilization and Ectomycorrhizal Fungal Inoculation on Productivity and Nutrient Accumulation of Eucalyptus globulus Plantation

作　　者：徐大平[1] Bernie Dell 弓明钦[1] Nick Malajczuk 王志和 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州5105203 [2]School of Biological Sciences and Biotechnology, Murdoch University [3]云南省楚雄州林业科学研究所,云南楚雄678000

出　　处：《林业科学研究》2004年第1期26-35,共10页Forest Research

基　　金：澳大利亚国际农业研究中心资助的项目(ACIAR9224);国家科学基金重点项目(39630240)的部分内容

摘　　要：主要研究施P肥和接种外生菌根菌对蓝桉生长、生物量和养分积累的影响。在云南楚雄的试验表明:接种外生菌根菌只能在幼林期促进树木生长,3a后这种促进作用不显著。施P肥能在幼林期促进蓝桉树高和胸径的生长,但4 5a后这种促进作用也变得不显著。由于施P肥提高了蓝桉的保存率,所以也显著地提高了蓝桉林的生物量。低P处理时,树木保存率低,较大的生长空间促进了树木的后期生长,可能会导致施P肥对后期单株蓝桉树高和胸径生长作用不显著。施P肥还增加了树木N、P和K的养分积累量,提高了上述养分的利用效率。施P肥同时还明显增加了林下植被和林下凋落物P的积累量,但不能明显增加N和K的养分积累量。树木叶片和土壤分析结果进一步说明施P肥对蓝桉幼林作用明显。试验表现出接种外生菌根菌只能在低P情况下促进树木生长,不能在高P情况下促进树木生长的基本趋势。This paper dealed with the effects of P fertilization and ectomycorrhizal fungal inoculation on productivity and nutrient accumulation of Eucalyptus globulus plantation in Chuxiong, Yunnan. The results showed that ectomycorrhizal fungal inoculation increased tree growth of E. globulus in early stage of the plantations. However,the effect of ectomycorrhizal fungal treatments was no significant three years after plantation establishment. P fertilization increased tree diameter and height growth. But the effect of P treatments was not significant at 4.5 years old. P fertilization increased survival rate of planted trees. The low survival rate in low P treatments could increase tree growth in late stage of the plantation. The insignificant effect of P treatments at 4.5 years old was partly due to the change of survival rate in different P treatments. P fertilization increased N, P and K accumulation in tree biomass and nutrient use efficiency in wood and biomass production. P fertilization increased P accumulation in understorey and litter, but N and K. Leaf and soil sample analysis further proved that P fertilization promoted tree growth in the early stage. The experimental results indicated that ectomycorrhizal fungal inoculation could only increase tree growth in low P treatments instead of high P treatments.

关 键 词：蓝桉 产量 养分积累 外生菌根菌 接种 磷肥 生物量 

分 类 号：S792.39[农业科学—林木遗传育种]