摘要
[目的]为合理利用施肥等栽培措施控制稻曲病发生提供科学依据。[方法]通过氮肥不同施用量及不同施用时期对稻曲病发生的小区评价试验研究稻曲病发生与氮肥施用的关系。[结果]稻曲病的发生与稻田施肥的时期和用量密切相关。分蘖期和孕穗期追施氮肥的稻曲病发病相对较重,发病率和病指分别达到9.38%、5.06和12.17%、6.33,明显高于稻田中后期不追施氮肥和早期仅施农家肥的处理,后者的发病率和病指仅为3.92%、1.38和0.93%、0.25,同时,相同施肥水平下,孕穗期偏施氮肥易于稻曲病的发生。[结论]以农家肥为底肥,适时适量追施的氮肥能降低稻曲病发病的风险。
[Objective] The aim was to provide the scientific basis for controlling rice false smut by applying cultivation measures such as reasonable utilization of N fertilizer.[Method] The relationship between the occurrence of rice false smut and N fertilizer application was studied by the plot evaluation experiment of applying N fertilizer with different application rate at different application stage to control rice false smut.[Result] There was a close relationship between the occurrence of rice false smut and the stage and the dosage of fertilizer application in the rice field.The rice false smut was relatively heavy when applying N fertilizer at the tillering stage and the booting stage,and its incidence rate and disease index in the two stages were 9.38%,5.06 and 12.17%,6.33,resp.,which was significant higher than that without applying N fertilizer in the middle-later period of rice and applying farm manure only in the early stage.The incidence and disease index of the latter two conditions were 3.92%,1.38
and 0.93%,0.25,resp.At the same time,the rice false smut was easy to occur when applying N fertilizer partially at the booting stage.[Conclusion] With the farm manure as base,applying N fertilizer timely with proper quantity fertilizer could reduce the occurrence risk of rice false smut.
出处
《安徽农业科学》
CAS
北大核心
2008年第20期8665-8666,共2页
Journal of Anhui Agricultural Sciences
基金
贵州省农业科学院重点项目[黔农科合(重点)07016]
贵州省农业科学院预研项目[yy05007]
贵州省科技厅带帽项目[黔科合带帽字(2007)5003]
关键词
稻曲病
氮肥
发病率
病情指数
Rice false smut
N fertilizer
Incidence
Disease index
作者简介
何海永（1976-），男，贵州遵义人，研究实习员，从事植物病理研究工作。
