For screening safe and efficient control techniques to control root-knot nematode (Meloidogyne incogni-ta )in continuous cropping watermelon system,four mechanical tillage technologies including shallow tillage,deep tillage,shallow tillage in combination with dazomet,and deep tillage in combination with dazomet were carried out to evaluate the effects on nematodes and micro minerals.Compared with the common tillage mode,all the four treatments significantly reduced the number of root-knot nematodes in the soil,improved the control effica-cy,and increased the yield of watermelon.Among those treatments,deep tillage in combination with dazomet had the best effects on nematode control and watermelon yield.Treatment of deep tillage in combination with dazomet increased the level of exchangeable magnesium and effective selenium,but had no significant impact on the level of exchangeable calcium and effective copper.Comprehensive evaluation suggested that deep tillage in combination with dazomet was applicable to the areas where root-knot nematodes occurred severely,while the shallow tillage treatment was effective for the areas where the disease is not very serious.In this investigation,a new mode of controlling root-knot nematode was presented by deep tillage in combination with fumigation,which would be useful in decreasing the dosage of chemical and fertilizer,and protecting the agricultural eco-environment.
Meloidogyne incognitacontinuous cropping obstaclemechanical deep tillagesoil fumigation
NETL
NSTL
维普
万方数据
