不同肥料类型对尾巨桉幼林生物量分配及养分利用率的影响

Effects of Different Fertilizer Types on Biomass, Nutrient Distribution and Nutrient Utilization of Eucalyptus urophylla × E. grandis

为了给尾巨桉幼林的施肥提供依据,以肥料类型为试验因素,采用随机区组设计对其进行培育,研究不同肥料类型对尾巨桉幼林生物量、养分分配及养分利用率的影响。结果表明:在等N、P、K施入量的条件下,地径、树高生长、生物量分配以处理Ⅲ最佳。整体排序为处理Ⅲ>处理Ⅱ>处理Ⅰ>CK。国产的有机无机复合肥对幼林尾巨桉树高、地径、生物量效果最佳,进口复合肥次之,传统复混肥最差。国产的有机无机复合肥与进口复合肥的养分利用效率无显著差异。从尾巨桉的生长以及生产成本考虑,推荐使用国产的有机无机复合肥施肥。

In order to provide a basis for efficient fertilization of Eucalyptus urophylla×E.grandis,a rangeof fertilizer types were applied in a randomized complete block design field trial.The effects of fertilizer type on the biomass,nutrient allocation and nutrient use efficiency were studied,with results showing that for the same total amounts of applied N,P,K,treatment III provided the greatest ground diameter,tree height growth as well as the highest fresh and dry biomass.The other treatments were generally ranked for these parameters(from best to poorest)in the order:treatment II>treatment I>CK.Domestic organic and inorganic compound fertilizers generally provided the largest ground diameters,dry and fresh biomass for E.urophylla×E.grandis,whilst traditional compound fertilizer gave the poorest growth and imported compound fertilizer was intermediate between the two types.As to nutrient use efficiency,no significant differences were found between imported compound fertilizer and both domestic organic and domestic inorganic fertilizers.Therefore,to optimize both growth and cost of production in commercial E.urophylla×E.grandis plantations,domestic organic and inorganic fertilizers are recommended.