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PubMed
Article by Jiang L
Article by Li Y
Article by Huang Y
Article by Liu H
Article by Zhang Y
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A study of ecological stoichiometry characteristics of Leymus chinensis under saline-alkali stress
JIANG Li-xin1, LI Yue-fen1, HUANG Yu-jin1, LIU Hong-shan1, ZHANG Yu-shu2
1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Institute of Soil and Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Abstract: In this paper, the ecological stoichiometric of Leymus chinensiswere taken as the research object,and pot experiments were carried out to study the ecological stoichiometric characteristics of Leymus chinensis under different saline-alkali stresses (controlled pH of culture substrate, fertilization treatment and time interval).The results showed that the concentrations of total phosphorus(TP)in Leymus chinensis increased with the phosphate treatment solution.On the premise that other controlled conditions remained unchanged, the concentrations of total nitrogen (TN) and TP both peaked in the aboveground parts of Leymus chinensis when the pH of culture substrate approached 8.4.It is also found that, under the conditions of N3(c(N)=8 mmol/L, c(P)=1 mmol/L) or P3(c(P)=1.2 mmol/L, c(N)=14 mmol/L), there was a relatively slight fluctuation of N:P and the variation gradually become stationary.It indicated that,under such conditions, the influence from pH of culture substrate N:P was demoted.That is, with a hospitable pH of culture substrate, the fertilization condition of N3 or P3 was the optimal nutritional background for the growth of Leymus chinensis in this study. Therefore, applying nitrogen or phosphate fertilizer can improve the soil environments for the favor of the growth of Leymus chinensis, on the condition that soil pH is suitable for the growth.
Keywords: Leymus chinensis   ecological stoichiometry characteristics   saline-alkali stress  
�ո����� 2018-11-03 �޻����� 2019-01-15 ����淢������  
DOI: 10.3969/j.issn.1004-5589.2019.01.030
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