نتایج جستجو برای: pinus elliottii

تعداد نتایج: 13244  

2013
Steven E. McKeand Eric J. Jokela Robert B. Rummer Leslie H. Groom Kurt H. Johnsen

(ed. B.P. Singh) 427 pine (Pinus elliottii var. elliottii). Of note, the former two are also considered to be species of concern for conservation (Erickson et al., 2012) due to long-standing land management practices that have favoured loblolly pine. Similarly to loblolly pine, although on a smaller scale, slash pine has been widely planted and managed for wood and fibre production. Because of ...

2012
Grant L. Harley Henri D. Grissino-Mayer Sally P. Horn

We focussed on the influence of historical fire and varied fire management practices on the structure of globally endangered pine rockland ecosystems on two adjacent islands in the Florida Keys: Big Pine Key and No Name Key. We reconstructed fire history in two stands from fire scars on South Florida slash pines (Pinus elliottii Engelm. var. densa Little & Dor.) that were accurately dated using...

2015
Wen-Tao Zou Wei-Sheng Zeng Ming Zeng Eric J. Jokela

To analyze the main variables affecting crown biomass, we measured crown biomass and a number of variables describing tree size, such as stem diameter at breast height (D), tree height (H), crown width (Cw) and crown length (Cl), from 754 sample trees of four pine species in China, specifically, Pinus massoniana, P. yunnanensis, P. tabulaeformis and P. elliottii. In addition, we developed indiv...

2012
Behzad Mortazavi Maureen H. Conte Jeffrey P. Chanton J. C. Weber Timothy A. Martin Wendell P. Cropper

[1] We measured the dC of assimilated carbon (foliage organic matter (dCOM), soluble carbohydrates (dCSC), and waxes (dCW)) and respiratory carbon (foliage (dCFR), soil (dCSR) and ecosystem CO2 (dCER)) for two years at adjacent ecosystems in the southeastern U.S.: a regenerated 32 m tall mature Pinus palustris forest, and a mid-rotation 13 m tall Pinus elliottii stand. Carbon pools and foliage ...

2014
Fengli Chen Kexin Hou Shuangyang Li Yuangang Zu Lei Yang

An ionic liquids-based ultrasound-assisted extraction (ILUAE) method was successfully developed for extracting shikimic acid from conifer needles. Eleven 1-alkyl-3-methylimidazolium ionic liquids with different cations and anions were investigated and 1-benzyl-3-methylimidazolium bromide solution was selected as the solvent. The conditions for ILUAE, including the ionic liquid concentration, ul...

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