Effects of Cutting on Soil Respiration Rate of Cultivated Grassland in North China Plain

  • 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2011-03-28

  Revised date: 2011-08-24

  Online published: 2012-05-20


Cutting can play a vital role in common management of cultivated grassland. The aim of this study was to clarify the effects of cutting on soil respiration rate of cultivated grassland and the variation of soil respiration before and after cutting. Based on experiment data of soil respiration of cultivated grassland for 4 forages [3-year alfalfa (Medicago sativa L. ),6-year alfalfa,white clover (Trifolium repens L. ),and triticale (Triticosecale Wittmack cv. Triticate-830)] in Yucheng Comprehensive Experimental Station of Chinese Academy of Sciences, daily variations of grassland soil respiration before and after cutting and effects of cutting on grassland soil respirations were determined. The results showed that soil respirations of different grasslands were obviously different before cutting. 1) The intensity of grassland soil respirations were 3-year alfalfa>6-year alfalfa>white clover>triticale. However, the intensity of grassland soil respirations was between 3.0-3.5 μmol CO2·m-2·s-1. 2) Before cutting, diurnal variations of soil respirations of different grassland types were also different from each other. Diurnal variations of soil respirations of 6-year alfalfa and triticale were almost the same. Their soil respirations increased gradually from 9: 00 and keep relative high values between 12:00 and 16:00, and then decreased gradually. 3) Diurnal variations of soil respirations for 3-year alfalfa and white clover were consistent. Their soil respirations increased gradually from 9:00 and got to a climax at 12:00, then decreased gradually after that. Ten days after cutting, grassland soil respirations for all forages decreased by 30%-40% comparing with those before cutting. 4) The values of Q10 were between 1 and 2.32 before and after cutting and the mean value was 1.37. The mean value of Q10 was 1.63 before cutting and was 1.10 after cutting.

Cite this article

SUN Zhen-zhong, WANG Ji-shun, PAN Guo-yan, OUYANG Zhu, LI Fa-dong, CHENG Wei-xin . Effects of Cutting on Soil Respiration Rate of Cultivated Grassland in North China Plain[J]. JOURNAL OF NATURAL RESOURCES, 2012 , (5) : 809 -819 . DOI: 10.11849/zrzyxb.2012.05.010


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