“广林9号”无性系桉树速丰林配方施肥试验

Prescribed Fertilization Experiment with Fast-growing Plantation of 'Guanglin No.9' Clone of Eucalyptus

不同施肥处理对“广林9号”无性系桉树速丰林生长量和经济效益的影响研究表明:各处理与对照间差异均达到1%极显著水平,其中以基肥含N 5%,P2O515%,K2O 5%及适量微量元素和有机质,株施肥量0.50 kg,追肥含N 16%,P2O510%,K2O 14%及2%左右的微量元素铜锌硼,年株施肥量0.50 kg的施肥处理经济效益最佳,预期5年出材量145.50 m3/hm2,纯利润33 127元/hm2.研究还得出,培育桉树速丰林选用肥料时,首先应考虑肥料的总养分含量和配比,其次要考虑施用量,最后考虑颗粒形态.

The influence of diverse fertilization treatments upon growth rate and economic benefits of fast - growing plantation of＂ Guanglin No. 9＂ clone of Eucalyptus was investigated. The results showed that the difference between the treatments and the control was significant. The best economic benefit could be obtained by 0. 5 kg/plant basal dressing prescribed as mixture of （5% N ＋ 15% P2O5 ＋5% K2O） applied together with some organic compost and some microelements, which was combined with 0. 5 kg/plant/year top dressing prescribed as mixture of （ 16% N ＋ 10% P2O5 ＋ 14% K2O） with 2% Cu, Zn and B microelements. The forecast timber yield of 5 -year-plantation could be 145.50 m^3/hm^2 and the net profit would be 33 127 ￥/hm^2. The experiment also showed that the total amount of efficient nutrients and the proportions of the elements should be firstly taken into consideration, followed by dosages and the grain form of fertilizers.