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| Effects of Different Preceding Crops on Clubroot and Yield of Chinese Cabbage in Autumn |
| LU Peng，LUO Xiaohan，WANG Xuedong，LIANG Xinyu，WU Fengzhi，PAN Kai* |
College of Horticulture and Landscape Architecture，Northeast Agricultural University，Harbin 150030，Heilongjiang，China
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Abstract In order to screen out the suitable preceding crops for Chinese cabbage production in autumn in
open fields of northern China，this paper took the long-term planting model at the locality of garlic + Chinese
cabbage as the contrast；studied the effects of 3 different preceding crops including wheat，potato onion，and
soybean on clubroot and yield of Chinese cabbage in autumn．The results showed that taking soybean，potato
onion and wheat as preceding crops could reduce the content of resting spores of Plasmodiophora brassicae in
spring-crop soil．The disease index of clubroot of autumn Chinese cabbage treated with potato onion + Chinese
cabbage were all the time significantly lower than that of the contrast．The overground part fresh，dry weight
and yield of Chinese cabbage in autumn treated with potato onion + Chinese cabbage and wheat + Chinese
cabbage were all significantly higher than the overground part fresh，dry weight and yield of Chinese cabbage
gained 30 days and 40 days after sowing．In summary，taking potato onion as the preceding crop can inhibit
the occurance of clubroot in Chinese cabbage in autumn and increase its yield as well．This technology is
suitable for application in local production．
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Received: 05 May 2020
Published: 02 August 2020
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