Effect on Eliminating Obstacle of Cropping Soil Treated by Anaerobic Soil Disinfestation with Different Temperature
To explore the influence on the removal of obstacle factors in continuous cropping soil treated by anaerobic soil disinfestation ( ASD) under different treating temperature,taking tomato continuous cropping soil as the research object,five soil treatments were set up as the following:control( CK)、treated by ASD at 10 ℃,20 ℃,30 ℃ and 40℃,respectively,which were all sealed and treated in bio-chemical incubator for 3 weeks. The results showed that soil pH values were significantly increased and EC values decreased by ASD treatment at different temperatures,and the contents of soil organic carbon ( TOC) and available K increased significantly. Effect on elim-ination NO-3 contents in soils treated by ASD were poor at low temperature (≤10 ℃) ,while the NH+4 contents in soils treated by ASD significantly increased at high temperature ( 40 ℃) . The number of bacteria in soils treated by ASD significantly increased at different temperatures.The number of fungi and Fusarium oxysporum in soils treated by ASD at high temperature(40 ℃) were significantly de-creased.In conclusion, the best effect occurred in soil treated by ASD at high temperature (40℃),and the contents of TOC and availa-ble K in soil treated by ASD were significantly increased at different temperatures.
万方数据
维普
