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Effects of Different Frequency Mowing on C，N and P Characteristics of Chemical Measurement of Leymus chinensis(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年18
Page:
126-130
Research Field:
Publishing date:

Info

Title:
Effects of Different Frequency Mowing on C，N and P Characteristics of Chemical Measurement of Leymus chinensis
Author(s):
DONG Jingchao; SUN Jijun
Liaoning Institute of Sandyland Improvement and Utilazation，Fuxin,Liaoning 123000
Keywords:
Leymus chinensis; mowing frequency; characteristics of chemical measurement; effect
PACS:
-
DOI:
10.11937/bfyy.20164876
Abstract:
Via the analysis of the C，N and P elements concentration in Leymus chinensis leaves of the growing season medium-term，using the C/N element analyzer measurement and molybdenum blue colorimetric method to determine the concentration of C，N，P element，and calculate the C，N and P the stoichiometric ratio，different frequency of mowing treatment on L.chinensis C，N and P characteristics of chemical measurement were studied.The results showed that after mowing Leymus chinensis leaf C concentration compared with control (not mowing) had a tendency to reduce，N，P element concentration had a tendency to rise.As mowing frequency increasing C concentration decreased gradually，no significant difference between different mowing frequency；N and P concentration increased with the increase of mowing intensity.After mowing C/N and C/P compared with contrast decreased significantly，and with the increase of mowing frequency，the ratio gradually became smaller，no significant difference between the mowing frequency.After mowing N/P compared with control also had a downward trend，and with the increase of mowing frequency，the ratio increased gradually.Control with different frequency tationally cutting processing of N/P were greater than 16.Showed different frequency of mowing on L. chinensis leaves N/P was small，the influence of L.chinensis productivity was mainly restricted by P element.High frequency of mowing could cause lead to decreased biomass，plant growth and plant nitrogen and phosphorus use efficiency affected，cradling an annual leave one year was one of the best management practices.

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Last Update: 2017-10-06