摘要
为土传病虫害治理提供理论依据,通过臭氧水处理农田耕作层土壤,探索臭氧水不同处理时间(1h、3h、5h、7h、9h和11h)10cm、20cm和30cm土层土壤微生物量及养分含量的变化。结果表明:与对照相比,在臭氧水处理下,1)土壤中的细菌、真菌和放线菌数量均明显减少,处理后1h时细菌、真菌和放线菌的灭活率最高,分别为93.25%、91.38%和79.65%,而细菌、真菌和放线菌的灭活率随着土壤深度的增加而降低。臭氧水处理24h后,在10cm深度的土壤细菌、真菌、放线菌数量减少显著,灭活率分别为33.27%、39.62%和28%。2)臭氧水浇灌后,随时间变化土壤中的速效钾含量整体上升,在5h后,其含量增加最为显著,较对照增加10.1%,有机质含量显著降低,速效磷含量无显著变化;处理24h后,在10cm土层中,有机质、速效磷和速效钾含量明显降低,分别较对照降低38.8%、39.1%和55.9%,在20cm和30cm土层中,速效磷和速效钾含量降低不明显,有机质含量变化显著,分别较对照降低43.9%和36.4%。
The variation in microbial biomass and nutrient content of top soils with 10 cm,20 cm and 30 cm soil depths treated with ozone water for different treatment time(1 h,3 h,5 h,7 h,9 h and 11 h)was analyzed to provide the theoretical basis for control of soil-borne diseases and insect pests.Results:1)The amount of bacteria,fungi and actinomycetes in top soil treated with ozone water decreases obviously compared with CK.The inactivation ratio of bacteria,fungi and actinomycetes in top soil treated with ozone water for 1 h reaches 93.25%,91.38%and 79.65%respectively and reduces with increase of soil depth.The amount of bacteria,fungi and actinomycetes in top soil with 10 cm depth treated with ozone water decreases significantly and the inactivation ratio of bacteria,fungi and actinomycetes is 33.27%,39.62%and 28%after 24 h separately.2)The rapid available potassium content in top soil irrigated with ozone water rises along with time variation overall and the rapid available potassium content after 5 h is 10.1%higher than CK.The organic matter content decreases obviously and the rapid phosphorus content is no significant variation.The content of organic matter,rapid available phosphorus and rapid available potassium in top soil with 10 cm depth irrigated with ozone water is 38.8%,39.1%and 55.9%lower than CK after 24 h respectively.The organic matter content in top soil with 20 cm and 30 cm depth irrigated with ozone water 43.9%and 36.4%lower than CK after 24 h separately but the content of rapid available phosphorus and rapid available potassium is no variation obviously.
作者
魏俊杰
洪坚平
WEI Junjie;HONG jianping(Shanxi Agricultural University,Jinzhong,Shanxi 030801,China)
出处
《贵州农业科学》
CAS
2019年第7期30-34,共5页
Guizhou Agricultural Sciences
关键词
臭氧水
试验柱
土壤
生物化学性状
ozone water
testing column
soil
biochemical property
