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不同氮素水平下107杨光谱及光合响应特征研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年03期
Page:
70-74
Column:
研究论文
publishdate:
2016-05-18

Article Info:/Info

Title:
Hyperspectral response and light response of the Populus×euramericana ‘Neva' under different nitrogen nutrition levels
Article ID:
1000-2006(2016)03-0070-05
Author(s):
WANG Xinmei1 MOU Hongxiang1* YANG Kewei1 ZHAO Xue1SUN Xiao1 CHENG Zhiqing2WANG Hesong34
1.College of Forestry, Hebei Agricultural University, Baoding 071000, China;
2.Chinese Academy of Forestry Science, Beijing 100083, China;
3.College of Forestry, Beijing Forestry University,Beijing 100083, China;
4.Institute of Atmospheric Physics,Chinese Academy of Sciences, Beijing 100029, China
Keywords:
Populus×euramericana ‘Neva' nitrogen spectral reflectivity light response curve net photosynthetic rate
Classification number :
S792.119
DOI:
10.3969/j.issn.1000-2006.2016.03.012
Document Code:
A
Abstract:
In order to provide a theoretical foundation for nitrogen fertilizer management of Populus×euramericana ‘Neva'seedlings, the effects of nitrogen treatments on the hyperspctral and light-response curves of P. euramericana ‘Neva' annual seedlings were studied. The results showed that:① Spectral reflectance curves of P. euramericana ‘Neva'at the different nitrogen levels were almost the same. The curves would all possess typical“valley” and “peak” characteristics of green plants. In different nitrogen levels, hyperspectral reflectance first derivative increased with the increase of nitrogen and it had obvious trend of moving to long wavelength in the red edge region of 680-760 nm.② Under different nitrogen levels, the net photosynthetic rate, transpiration rate and stomatal conductance of P. euramericana ‘Neva' leaf increased sharply whereas intercellular carbon dioxide concentration of that decreased with the increase of light intensity. The photosynthetic capacity and optimal growth conditions of N-4(4 g)treatment leaf were the best among the treatments.

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Last Update: 2016-06-30