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NEEDLEFALL RETURNS AND RESORPTION RATES OF NUTRIENTS IN YOUNG INTENSIVELY MANAGED SLASH AND LOBLOLLY-PINE STANDS | |
DALLATEA, F; JOKELA, EJ | |
通讯作者 | DALLATEA, F |
来源期刊 | FOREST SCIENCE
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ISSN | 0015-749X |
出版年 | 1994 |
卷号 | 40期号:4页码:650-662 |
英文摘要 | Annual needlefall (NF) returns and resorption rates of nutrients in 6-yr-old slash (Pinus elliottii Engelm. var. elliottii) and loblolly (P. taeda L.) pine stands were investigated using a 2 x 2 x 2 factorial experiment (species, annual fertilization, sustained competition control) in north central Florida. Compared with the reference (untreated), the combination treatment (annual fertilizer plus competition control) increased NF N returns about 6.3-fold (from 2.5 to 15.8 kg ha(-1)) for slash pine and 13.3-fold (from 1.5 to 19.9 kg ha(-1)) for loblolly pine. Similar treatment effects were found for P, with recycling rates for loblolly pine greater than for slash pine. Absolute resorption rates of N (from 4.7 to 19.9 kg ha(-1) for slash pine; 2.5 to 21.1 kg ha(-1) for loblolly pine) and P (from 0.5 to 1.9 kg ha(-1) for slash pine; 0.2 to 2.4 kg ha(-1) for loblolly pine) increased for both species as management intensity increased (i.e., cultural treatments; reference vs. fertilizer plus competition control). However, specific resorption rates of N and P were lowest for fertilizer treatments. When averaged over all cultural treatments, slash pine resorbed more N (62 vs. 57%) and P (62 vs. 51%) than loblolly pine; approximately 26% of the annual P requirements for slash pine were met by reabsorption compared with 13% for loblolly pine. Nutrient pool size within the plant (uptake) and annual nutrient demands for growth were dominant factors influencing the nature and extent of N and P resorption for both pine species. |
英文关键词 | FERTILIZATION NITROGEN NUTRIENT RETRANSLOCATION PHOSPHORUS PINUS ELLIOTTII P-TAEDA COMPETITION CONTROL |
类型 | Article |
语种 | 英语 |
收录类别 | SCI-E |
WOS记录号 | WOS:A1994PT41800005 |
WOS关键词 | DESERT EVERGREEN SHRUB ; LARREA-TRIDENTATA ; ORGANIC-MATTER ; USE EFFICIENCY ; NITROGEN ; PHOSPHORUS ; RETRANSLOCATION ; PLANTATIONS ; ECOSYSTEMS ; FRACTIONS |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/130020 |
推荐引用方式 GB/T 7714 | DALLATEA, F,JOKELA, EJ. NEEDLEFALL RETURNS AND RESORPTION RATES OF NUTRIENTS IN YOUNG INTENSIVELY MANAGED SLASH AND LOBLOLLY-PINE STANDS[J],1994,40(4):650-662. |
APA | DALLATEA, F,&JOKELA, EJ.(1994).NEEDLEFALL RETURNS AND RESORPTION RATES OF NUTRIENTS IN YOUNG INTENSIVELY MANAGED SLASH AND LOBLOLLY-PINE STANDS.FOREST SCIENCE,40(4),650-662. |
MLA | DALLATEA, F,et al."NEEDLEFALL RETURNS AND RESORPTION RATES OF NUTRIENTS IN YOUNG INTENSIVELY MANAGED SLASH AND LOBLOLLY-PINE STANDS".FOREST SCIENCE 40.4(1994):650-662. |
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