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| Effects of Different Cultivation Measures on Soil Fungus，Fungal Diseases
and Yield of Continuous Cropping Potato |
| XIE Kui-zhong，LU Li-yin*，LUO Ai-hua |
| Potato Research Institute， Gansu Academy of Agricultural Sciences， Lanzhou 730070， Gansu， China |
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Abstract Different cultivation measures were adopted for o vercoming continuous cropping potato
（Solanum tuberosum L.）obstacles for 3 continuous years．The experiment result showed that from
2009 to 2011 the arable layer soil fungus of deepening tillage treatment reduced by 29.59%-51.63%
compared to the control．The arable layer soil fungus of inocula treatment reduced by 10.41%-71.96%．
The trace fertilizer treatment had no effect on the arable layer soil fungus of continuous cropping potato．
The potato early blight disease incidence of deepening tillage treatment reduced from 10.00 percentage
point to 35.00 percentage point compared to the control，while the inocula treatment reduced from
11.67 percentage point to 38.33 percentage point，trace fertilizer treatment reduced from 11.66 percentage point to 26.67 percentage point compared to the control. The potato early blight disease index
of deepening tillage treatment reduced by 20.34%-75.51% compared to the control，while the inocula
treatment reduced by 23.83%-64.50%，the trace fertilizer treatment reduced by 20.34%-52.26%
compared to the control，and the differences reached significant or very significant level. The potato late
blight disease incidence of deepening tillage treatment reduced from 15.00 percentage point to 37.50
percentage point compared to the control，while the inocula treatment reduced from 7.50 percentage
point to 36.67 percentage point，the trace fertilizer treatment reduced from 15.00 percentage point to
25.83 percentage point compared to the control. The potato late blight disease index of deepening tillage
treatment reduced by 57.03%-80.44% compared to the control，while the inocula treatment reduced by
24.69%-66.67%，the trace fertilizer treatment reduced by 27.12%-50.76% compared to the control，
and the differences reached significant or very significant level. The potato yield of deepening tillage
treatment increased by 21.20%-29.99% compared to the control，and the trace fertilizer treatment
increased by 6.14%-20.49%，the inocula treatment increased by 1.29%-13.42%，and the differences
reached significant or very significant level.
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Received: 18 July 2012
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