摘要
[目的]明确氯化苦对重茬草莓土壤生物(微生物数量)和非生物因子(酶活性和肥力)是否有影响。[方法]采用田间熏蒸技术,以草莓缓苗期和幼果期土样为研究对象。[结果]氯化苦熏蒸后,2个生育期土壤中细菌和真菌数量均显著降低,放线菌数量则表现为抑制-恢复的趋势;氯化苦对2个时期土壤脲酶活性均为强烈的抑制作用,对磷酸酶活性表现为抑制-恢复到对照水平,而对蔗糖酶活性均影响不大;氯化苦处理对土壤肥力的影响基本都呈显著的下降变化趋势。[结论]在草莓缓苗期和幼果期,氯化苦对土壤细菌和真菌数量、脲酶活性及土壤肥力有抑制作用,而对土壤放线菌数量、磷酸酶及蔗糖酶活性影响不大。
[Aims] The aims were to explore the effects ofchloropicrin on biotic （microbial population numbers） and abiotic factors（enzyme activity and soil fertility） in soil for continuous cropping strawberry. [Methods] Field fumigation technology was adopted, and the soil samples were collected at the strawberry recovering and young fruit period. [Results] At the two periods, the number of bacteria and fungi in soil was significantly reduced, and the number of actinomycete showed a tendency of inhibition-recovery. Chloropierin had significant inhibitory effects on the activity of soil urease, but had little influence on the activity of soil invertase. The effects of chloropicrin on the activity of soil phosphatase showed a tendency of inhibition-recovery. In addition, soil fertility showed significant downward trend under chloropicrin treatment. [Conclusions] At strawberry recovering and young fruit period, chloropicrin had significant inhibitory effects on the number of bacteria and fungi in soil, the activity of soil urease and soil fertility, but had little influence on the number of actinomycete, the activities of soil phosphatase and invertase.
出处
《农药》
CAS
CSCD
北大核心
2017年第2期131-134,共4页
Agrochemicals
基金
国家支撑项目(2014BAD16B0702)
关键词
氯化苦
熏蒸
重茬
微生物
酶活性
土壤肥力
chloropicrin
fumigation
continuous cropping
microbial population
enzyme activity
soil fertility
