C、N、P Contents Dynamics Of Calamogrostis Angustifola Under Different Water Gradients

Yu-jing LIAO, Hai-feng WU, Meng WANG


C、N、P contents dynamics of Calamogrostis angustifola growing on different water zonations,under variable water regime,were studied by field studying. Results showed that TC contents changed with the time and were higher in the zonations inundated all the year. TN、TP contents decreased as the water increasing and time passing. C、N、P contents of leaves were higher than that of stems and vaginas. C/N had different changing patterns in zonations with different inundation time, and C/P presented an increasing trend through the growing process and also as water increasing. N/P increased with the increasing water level, and took on a wave -like changing across the growing season. Quality of Calamogrostis angustifola decreased as water increasing, and the growth was constraint by N under all gradients at the beginning, but constraint by P at zonations inundated all the year while that at other zonations still constraint by N during the following growth stages.


Water gradients; Module; Nutrient elements; C/N, C/P, N/P

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DOI: http://dx.doi.org/10.3968/j.est.1923847920130502.Z001


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