不同施肥处理对尾巨桉生长量及经济效益的影响

Effects of Different Fertilizer Treatments on the Growth Rate and Economic Benefit of Eucalyptus urophyra×E. grandis

以广西黄冕林场的尾巨桉人工林为研究对象,采用不同施肥处理以及不同施肥量进行试验,探讨施肥处理和施肥量对尾巨桉人工林生长量及经济效益的影响。结果表明:尾巨桉施肥量为0.75 kg/株集中施肥的效果最佳,生长蓄积量显著高于其他施肥处理,经济效益也最高。而施肥量为0.5 kg/株集中施肥次之。综合分析,每年集中施肥1次,连续追肥3年,每次追肥量为0.5~0.75 kg/株的桉树生长效果最佳。此研究结果为桉树合理施肥提供参考和理论依据,对提高农业生产力和效益有重要的科学意义。

Eucalyptus urophyra×E.grandis plantations in the Huangmian State Forest Farm of Guangxi Autonomous Region were treated with fertilizer at different application patterns and rates to observe their growth and economic benefits.The results showed that the treatment of E.urophyra×E.grandis plantations with fertilizer at a concentrated application pattern and at a rate of 0.75 kg/tree gave the best results and that their growing stock and economic benefits were significantly higher than those of the other treatments,followed by the treatment with fertilizer at a concentrated application pattern and a rate of 0.5kg/tree.Comprehensive analysis showed E.urophyra×E.grandis plantations treated with fertilizer annually at a concentrated application pattern followed by fertilizer dressing for 3 years at a rate of 0.5~0.75 kg/tree grew the best.These fertilizer treatments provide reference for the rational fertilizer application to eucalyptus,and have a scientific significance in promoting of agricultural productivity and economic benefits.