闽江下游山地巨桉无性系施肥试验研究

对巨桉无性系施用不同肥料组合的试验研究结果表明:以火烧垃圾土做基肥再配施适量的尿素做追肥,组成了有机—无机复混肥体系,其施用效果明显优于纯化肥类肥料组合,不但能明显提高林分生产力、维持地力,而且经济效益较好,充分显示出有机无机混合肥的施用优势;采用火烧垃圾土2 kg.株-1(基肥)+尿素200 g.株-1(追肥)的施肥方案,2年生时林分平均树高、胸径、材积和蓄积分别可达9.41 m、9.51 cm、0.0335 m3和53.72 m3.hm-2,投入产出比高达1∶2.9,经济纯收入是纯化肥类肥料组合的2.0~2.8倍,符合桉树短工林集约经营和持续发展方向,值得推广应用。

Application Experiment of Eucalyptus grandis Clones on the Mountain Lands along the Lower Reach of Min River

The research results showed that the burnt garbage soil was taken as the basic fertilizer,which were applied with the suitable amount of urea as top fertilization,which formed the organic-inorganic compound and mixed fertilizer system,whose application effect was evidently superior to the application effect of pure type of fertilizer combination,the system not only could evidently raise the stand productivity,and maintain the soil fertility,but also had the good economic effect,and fully showed the organic-inorganic compound and mixed fertilizer application dominance; adopting the application project of 2 kg of burnt garbage soil per tree (basic fertilizer)+200 g of urea per tree (top fertilization),2-year-old stand average tree height,dbh,volume,and stocking could reach 9.41m,9.51cm,0.0335m~3,53.72m~3.hm~(-2),the ratio of input to output was 1∶2.9,the economic income was 2.0～2.8 times as large as that of pure fertilizer type of fertilizer compound,which met E.grandis industrial raw material forest intensive management and sustainable developmental direction,which was worth popularizing and applying.