稻秆淹水处理对高发病香蕉园土壤理化性状及病原菌的影响

发布时间：2018-04-02 03:13

本文选题：稻秆　切入点：淹水　出处：《江苏农业科学》2017年03期

【摘要】：采用室内模拟土壤添加稻秆后淹水的方法,通过对淹水处理期间土壤理化指标和尖孢镰刀菌数量的测定,研究了淹水期间不同稻秆用量对连作香蕉枯萎病高发香蕉园土壤性状和尖孢镰刀菌数量的影响。结果表明,与对照相比,常规淹水和淹水添加稻秆处理,均能明显降低土壤氧化还原电位(Eh)和尖孢镰刀菌数量,提高土壤p H值、有机质含量、有效磷含量、速效钾含量、有机酸浓度和Fe2+的浓度。处理36 d后,常规淹水、淹水添加0.5%稻秆、淹水添加1.0%稻秆、淹水添加2.0%稻秆等处理土壤中尖孢镰刀菌数量分别比对照降低了18.62%、33.95%、39.51%、47.84%。因此,对香蕉枯萎病高发蕉园,可采用稻秆还田后淹水的方法降低土壤中尖孢镰刀菌数量。
[Abstract]:In this paper, the soil physical and chemical indexes and the quantity of Fusarium oxysporum during flooding were determined by the method of simulating the soil after inundation by adding rice stalks into the laboratory.The effects of different amount of rice culm on soil characters and Fusarium oxysporum number in banana garden with high incidence of banana wilt in continuous cropping were studied.The results showed that, compared with the control, the treatment of conventional flooding and flooding with rice straw significantly decreased the number of soil redox potential (Eh) and Fusarium oxysporum, and increased soil pH, organic matter, available phosphorus and available potassium.Concentration of organic acids and Fe2.After 36 days of treatment, the amount of Fusarium oxysporum in the soil treated with conventional flooding, flooding with 0.5% rice stalk, flooding with 1.0% rice stalk and flooding with 2.0% rice stalk was decreased by 18.622 ~ 33.95% and 47.84%, respectively, compared with the control.Therefore, the amount of Fusarium oxysporum in soil can be reduced by the method of rice straw returning to the field and flooding.
【作者单位】：海南大学农学院;海南万钟实业有限公司;
【基金】：国家自然科学基金(编号:31372142、31572212) 国家重点基础研究发展计划(编号:2015CB150530)
【分类号】：S436.68;S153

【相似文献】