Stoichiometry characteristics of plant and soil in alfalfa grassland with different growing years

doi:10.11686/cyxb20140240

Abstract

Abstract: Through measuring and analyzing carbon (C), nitrogen (N), phosphorus (P), and its stoichiometry ratios of leaf, stem and 0-20 cm soil under different plant ages (1, 3, 4, 5 to 8 years) of alfalfa at the foot of Helan Mountain in Ningxia, the influence of planting-age on nutrient content and stoichiometry of soil and plant in alfalfa grassland were researched. 1)With the increase of plant time, 0-20 cm soil C and N firstly increase and then descend, but the P is contrary. There were significant differences between different planting-age (P<0.05). 2)The C in leaf decreased and P in leaf decreased after increase with the increasing of plant time. Each of stem nutrient content change as well as soil nutrient content, but the amplitude of variation is less than leaf nutrient content. 3) The N/P and C/P in leaf showed a negative correlation with P in leaf, but showed no correlation with N in leaf. There were a certain correlation between P in soil and C, N, P and its stoichiometry in stem.

CLC Number:

Q948.1

YANG Jing, XIE Ying-zhong, WU Xu-dong, XU Kun. Stoichiometry characteristics of plant and soil in alfalfa grassland with different growing years[J]. Acta Prataculturae Sinica, 2014, 23(2): 340-345.

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