Dynamic Distribution of Southern Root-knot Nematode Under Protected Cultivation Soil in Chifeng City
This paper mainly reveals the dhynamic occurrence rule of root-knot nematode in the vegetable soil of Chifeng protected area,and provides a theoretical basis for the control of southern root-knot nematode disease in this area.The dynamic change of root-knot nematode quan-tity in the soil of Chifeng protected land was monitored for 10 years.The dynamic change law of the lateral and vertical distribution of root-knot nematode in the soil from 2013 to 2014 was investigated.The dynamic occurrence law of the southern root-knot nematode under different years and agronomic measures was expounded.The results showed that the lateral distribution of southern root-knot nematodes in greenhouse soil was as follows:the northern and central nematodes were the most abundant,while the southern nematodes were the least abundant.The vertical dis-tribution of nematodes was as follows:the southern root-knot nematodes distributed most in the 4-15 cm soil layer,and less in the 15-25 cm soil layer.During the 10 years of monitoring sites,the occurrence rule of southern root-knot nematodes was as follows:about 6 generations occurred every year in greenhouses of monitoring sites,and each crop occurred about 3 generations.In terms of quantity,the maximum number of root-knot nematodes appeared around May and November every year,and the number of overwinter stubble was greater than that of autumn stubble. The distribution and dynamic occurrence of southern root-knot nematode in soil were studied,which can provide theoretical guidance for the prevention and control of root-knot nematode disease in Chifeng area.
万方数据
维普
