外源脂肪酸对辣椒生长及根际土壤环境的影响  

Effects of exogenous fatty acids on growth and rhizosphere soil of pepper plants

作　　者：张福建[1] 陈昱[1] 吴超群[1] 肖晨[1] 吴才君[1] 杨有新[1] ZHANG Fujian;CHEN Yu;WU Chaoqun;XIAO Chen;WU Caijun;YANG Youxin(College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China)

机构地区：[1]江西农业大学农学院,江西南昌330045

出　　处：《浙江农业学报》2017年第5期760-766,共7页Acta Agriculturae Zhejiangensis

基　　金：江西省现代农业科研协同创新专项经费(JXXTCX2015005-002);江西省科技厅重点研发计划重大项目(20161ACF60015)

摘　　要：为探讨外源棕榈酸和油酸对辣椒生长发育、根际土壤微生物数量及酶活性的影响。采用盆栽试验,设置棕榈酸处理、油酸处理和对照处理(不加任何脂肪酸),研究脂肪酸对辣椒生长发育、土壤酶活性及微生物的影响。结果表明,添加棕榈酸和油酸可促进辣椒的生长发育,提高光合作用,有利于改善根际土壤环境。其中,棕榈酸处理对辣椒生长的促进效果最为显著,辣椒株高、茎粗、生物量和光合作用较对照存在显著性差异。同时,棕榈酸和油酸处理均增加了辣椒根际土壤放线菌和细菌数量,降低了真菌数量,提高了多酚氧化酶、脲酶和蔗糖酶活性,且两处理根际土壤p H值显著升高,电导率显著降低。可见,在栽培辣椒的土壤中添加棕榈酸和油酸有助于促进辣椒的生长及根际土壤环境的改善。To investigate the effects of palmitic acid and oleic acid on the pepper plant growth,the rhizosphere soil microorganism and enzyme activities,pot experiments were performed to investigate the exogenous fatty acids function on the growth of pepper plants and soil environment,including three treatments(palmitic acid,oleic acid and control without any fatty acid added to the soil).The results showed that palmitic acid and oleic acid added to soil could promote growth and development of pepper plants,and improve rhizosphere soil microorganism.The palmitic acid treatment significantly promoted the growth of pepper plants,including plant height,stem diameter,biomass,and photosynthesis compared with the control.At the same time,the palmitic acid and oleic acid treatment increased the rhizosphere actinomycetes and bacteria,reduced the number of fungi,accompanying with increasing of polyphenol oxidase,urease and invertase activity.The two treatments increased pH value and decreased electrical conductivity of the rhizosphere soil.Therefore,soil added with palmitic acid and oleic acid promoted pepper growth and improved its soil environment.

关 键 词：辣椒 棕榈酸 油酸 生长发育 微生物量 土壤酶 

分 类 号：S641.3[农业科学—蔬菜学]