DOI: 10.1016/j.foreco.2012.10.033
Scopus记录号: 2-s2.0-84878115843
论文题名: Fertilizer management of eucalypt plantations on sandy soil in Brazil: Initial growth and nutrient cycling
作者: Silva P.H.M.D. ; Poggiani F. ; Libardi P.L. ; Gonçalves A.N.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 301 起始页码: 67
结束页码: 78
语种: 英语
英文关键词: Eucalyptus productivity
; Fertilization timing
; Nitrogen and potassium leaching
; Nutrient doses
; Soil solution drainage
Scopus关键词: Application of fertilizers
; Commercial applications
; Fertilization timing
; Fertilizer applications
; Fertilizer management
; Potassium leaching
; Significant differences
; Soil solutions
; Biomass
; Calcium
; Fertilizers
; Leaching
; Nutrients
; Productivity
; Soil moisture
; Sustainable development
; Forestry
; biomass
; cost-benefit analysis
; economic analysis
; fertilizer application
; forest management
; forestry production
; growth rate
; harvesting
; mineral
; nitrogen
; nutrient cycling
; nutritional status
; potassium
; sandy soil
; sustainability
; tree planting
; tropical soil
; Brazil
; Eucalyptus
; Eucalyptus globulus
英文摘要: The sustainability of plantation forests requires the consideration of environmental and economic factors. Fertilization is an important practice in eucalypt plantations that should be adjusted to provide high productivity at the lowest cost without negatively affecting the environment. Eucalypt plantations are expanding worldwide, mainly because of the growing demand for wood and the high potential biomass production. Many field experiments have shown that using large amounts of fertilizer increases tree growth. However, the excessive or inappropriate application of fertilizer can cause nutrient leaching and the loss of the fertilizer. In this study, we evaluated the effect of increasing the fertilizer doses on the early growth and nutrient cycling in eucalypt plantations. Moreover, the amount of N and K leached after the application of split vs. single applications of N and K fertilizers after planting were quantified. A eucalypt plantation with a randomized block design was established in southern Brazil, consisting of six treatments and five blocks. The split application include the following five treatments of N and K fertilizers after planting: T1=control (without fertilizer), T2=40kgha-1 N; 16kgha-1 P; 53kgha-1 K (literature recommendation), T3=twofold the dose in T2 (commercial application used by forest companies), T4=threefold the dose in T2, T5=fourfold the dose in T2 (highest dose), and one treatment (T6) where the N and K fertilizers after planting amount in T3 was with a single application added at age 3months. At harvest, the export of nutrients was greater than the amounts added by a commercial mineral fertilization only for N. The eucalypt trees responded positively to increasing the fertilization rates, especially during the first year after planting. The highest dose of fertilizer led to the production of 57Mgha-1 of biomass (at age 24months), 48% higher than in the control treatment. However, the effect of the highest dose was more evident the first year after planting. The enhancement in biomass production decreased in the second year. The application of fertilizer also resulted in a large nutrient transfer to the soil through the leaf litter. The eucalypt trees receiving the highest dose of fertilizer transferred 50kgN, 20kgK and 80kg Ca ha-1 to the soil over the second year after planting, whereas only 25kgN, 6.5kgK and 47kg Ca ha-1 was returned to the soil by the control-treated trees in the same period. At age 24months, there were no significant differences between the T3 and T6 regarding productivity and nutritional status. Splitting the application of the N and K fertilizers after planting reduced the amounts N-NO3- leached at a depth of 0.9m by 3.0kgha-1 (T3=5.6kg and T6=8.6kg) and the amount of K+ by 31.7kgha-1 (T3=8.3kg and T6=40kg) over the first 2years after planting. Our results suggest that the number of N and K fertilizer applications can be reduced after planting in commercial plantations established on deep tropical soils without negatively affecting on productivity and limited losses by deep drainage. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66596
Appears in Collections: 影响、适应和脆弱性
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作者单位: Instituto de Pesquisas e Estudos Florestais (IPEF), Avenida Pádua Dias, 11, Caixa Postal 530, CEP: 13400-970, Piracicaba/SP, Brazil; Escola Superior de Agricultura Luiz de Queiroz(ESALQ), Universidade de São Paulo (USP), Av. Pádua Dias, n 11. Caixa Postal: 09, Agronomia, Piracicaba/SP, Brazil
Recommended Citation:
Silva P.H.M.D.,Poggiani F.,Libardi P.L.,et al. Fertilizer management of eucalypt plantations on sandy soil in Brazil: Initial growth and nutrient cycling[J]. Forest Ecology and Management,2013-01-01,301