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| Effects of Single-root-grafting and Double-root-grafting on Cucumber Rhizosphere Soil Microorganism and Enzyme Activity |
| XIE Yuan-feng1，TIAN Yong-qiang1，2，LI Shuo1，YAO Kai-qian1，MA Zhi-ming1，YANG Ya-ting1，GAO Li-hong1* |
| 1College of Agronomy and Biotechnology，China Agricultural University，Beijing 100193，China|2College of Resources and Environmental Sciences，China Agricultural University，Beijing 100193，China |
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Abstract This experiment was conducted to study the effects of self-root-grafting（as control），single-root-grafting and double-root-grafting on cucumber yield，rhizosphere microorganism population and enzyme activities in spring and autumn seasons．The results showed that both single-root-grafting and double-root-grafting could significantly increase cucumber yield，populations of soil bacteriam and actinomycetes，decrease the population of fungi and Fusarium oxysporum（cucumber pathogen）．The single-root-grafting significantly decreased the population of Fusarium oxysporum and increased the population of actinomycetes than the double-root-grafting．The order of rhizosphere soil urease，neutral phosphatase，invertase and catalase activity of cucumber produced in autumn were double-root-grafting > single-root-grafting > self-root-grafting（control）．
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Received: 19 April 2012
Published: 06 May 2012
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