摘要
【目的】从棉花黄萎病微菌核含量水平揭示棉田深翻(深翻60 cm)对棉田棉花黄萎病发病的影响。【方法】利用MSM选择性培养基和水筛法分离土壤中的微菌核。【结果】深翻棉田土壤中的棉花黄萎菌微菌核数量低于常规棉田,深翻棉田棉花黄萎病发病程度也轻于常规棉田,说明深翻对棉花黄萎病的发生具有较明显的抑制作用。通过试验明确了棉田土壤中微菌核的数量,1年内有2次比较明显的消长,现蕾期出现第1个高峰,到吐絮期出现第2个高峰,微菌核数量越多病情越重。深翻田病情指数与微菌核数量的相关系数为0.891 1,常规棉田病情指数与微菌核数量的相关系数为0.450 3。【结论】棉田深翻能有效的降低棉花黄萎病的发生和危害。
【Objective】The effect of deep plough（60 cm） on cotton Verticillium wilt was explored by testing the soil content of microsclerotia.【Method】MSM selectivity culture medium and water filtration were used to separate microsclerotia from soil.【Result】The result showed that the content of microsclerotia in deep plough cotton field was less than that of the un-ploughed field,cotton Verticillium wilt in normal cotton field is severe than that of deep plough field.It indicated that deep plough has obvious restrictive effect on cotton Verticillium wilt. The content of microsclerotia in soil had twice obvious dynamic change with two fastigium in one year.Once was at the buding stage and the other was at the cotton blowing stage.The number of microsclerotia and the occurrence of cotton Verticillium wilt had correlation.And the Verticillium wilt became more severity when the number of microsclerotia increasing.Relation ratio of disease index and microsclerotia in deeped ploughing cotton field was 0.891 1,but in normal cotton field is 0.450 3.【Conclusion】Deep plough could reduce cotton Verticillium wilt effectively.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2010年第5期932-935,共4页
Xinjiang Agricultural Sciences
基金
公益性行业(农业)项目
国家农业部项目(nyhyzx07-052)
关键词
棉花
深翻
选择性培养基
棉花黄萎菌微菌核
发病高峰期
cotton
deep plough
selectivity culture medium
microsclerotia of cotton
disease fastigium
