Resorption Efficiencies of Nitrogen and Phosphorus of Phyllodes during Senescence for Acacia confusa at Wulaofeng,Xiamen

  • TAN Zhong-qi
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  • Xiamen Administration Centre of Greening, Xiamen 361004, Fujian China

Received date: 2010-05-20

  Online published: 2010-09-10

Abstract

Nitrogen and phosphorus concentrations, N:P ratio and nutrient resorption efficiency of phyllodes during senescence for Acacia confusa were studied at Wulaofeng, Xiamen.The results showed:(1) Mature phyllodes had the high N concentration, with 39.90±2.10 mg/g in winter, and 43.13±1.67 mg/g in spring;P concentration of mature phyllodes was 1.24±0.04 mg/g in winter, and 1.16±0.05 mg/g in spring, respectively;N and P concentrations decreased with phyllodes senescence.(2) N:P ratio of mature phyllodes was 32.26±1.53 in winter and 37.37±1.61 in spring, respectively;N:P ratios were above 16, which illustrated that Acacia confusa forest was P-limited.Resorption efficiency of P was significantly higher than resorption efficiency of N.

Cite this article

TAN Zhong-qi . Resorption Efficiencies of Nitrogen and Phosphorus of Phyllodes during Senescence for Acacia confusa at Wulaofeng,Xiamen[J]. Subtropical Plant Science, 2010 , 39(03) : 18 -20,78 . DOI: 10.3969/j.issn.1009-7791.2010.03.006

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