The effects of biochar(BC),arbuscular mycorrhizal fungi(AM),nitrogen(N)and their composite treatments(BC+N,AM+N,BC+AM and BC+AM+N)application on Cichorium intybus L.(C.intybus L.)nutrient uptake,soil properties and ca...The effects of biochar(BC),arbuscular mycorrhizal fungi(AM),nitrogen(N)and their composite treatments(BC+N,AM+N,BC+AM and BC+AM+N)application on Cichorium intybus L.(C.intybus L.)nutrient uptake,soil properties and cadmium(Cd)accumulation were investigated in Cd contaminated soil(0.11 mg·kg^(-1)).The results showed that the addition of BC increased the rate of mycorrhizal infection.However,the addition of N slightly inhibited mycorrhizal colonization,and the shoot and root bioaccumulation of chicory was positively influenced by BC and N when inoculated with AM fungi.Compared with the single component treatment(AM,BC or N)or two-component treatment(BC+N,AM+N or BC+AM),the three-component composite treatment(BC+AM+N)had the highest shoot bioaccumulation,whereas BC+AM treatment was considered the best for root biomass bioaccumulation.Compared with the control treatment,the single component treatment(AM,BC or N)and the composite treatment resulted in an overall improvement of the chicory shoot,root related nutrient uptake(N,P,K,Mg,Ca,Mn and Fe)and some soil physicochemical properties;in addition,these treatments showed better results than BC+AM+N and BC+AM treatments.Among the Cd-related indexes,Cd concentrations in the shoot,root and soil of C.intybus L.were reduced through treatment with AM and BC.However,a lower bioconcentration coefficient(BCF)and a higher transfer coefficient(TF)were observed in both treatments,and the most desirable effect was observed following the combination treatment(BC+AM).Compared with other single management,the shoot and root Cd concentrations of C.intybus L.after the management of N alone were higher,and the value of BCF(2.63%)was higher,but the value of TF(1.05%)was lower.Indexes related to Cd improved concurrently following the application of N in combination with BC or AM.Therefore,in Cd contaminated soils,single or combined application of BC,AM and N could promote chicory growth and nutrient uptake and improve some soil physicochemical properties.However,N should not be applied alone and needed to be combined with AM and BC;furthermore,it was evident that the treatment with the three composites(BC+AM+N)was optimal from an application point of view.展开更多
本试验以黄瓜‘新泰密刺’和番茄‘D2856’为试材,研究在低温弱光(15℃/8℃,80μmol·m^(-2)·s^(-1),low temperature and low light,LL)下,丛枝菌根真菌(Arbuscular mycorrhizal fungi,AMF)和宛氏拟青霉(Paecilomyces variot...本试验以黄瓜‘新泰密刺’和番茄‘D2856’为试材,研究在低温弱光(15℃/8℃,80μmol·m^(-2)·s^(-1),low temperature and low light,LL)下,丛枝菌根真菌(Arbuscular mycorrhizal fungi,AMF)和宛氏拟青霉(Paecilomyces variotii)提取物智能聪(ZNC)对黄瓜和番茄幼苗生长及其抗氧化系统活性的影响。幼苗两叶一心时LL处理7 d,LL下根施基质重量比1%AMF(LL+AMF)和喷施10 mL 10 ng·mL^(-1) ZNC(LL+ZNC),以正常温光为对照(28℃/18℃,600μmol·m^(-2)·s^(-1),CK)。结果表明,与CK相比,LL显著降低黄瓜和番茄壮苗指数和根系活力,抑制植株生长,且黄瓜和番茄幼苗SOD、POD活性及可溶性糖和蛋白含量增加,说明LL引起植株膜脂过氧化。LL下施用AMF和ZNC显著提高黄瓜和番茄的可溶性糖含量以及POD和CAT活性。其中,LL下施用AMF和ZNC黄瓜的壮苗指数显著提高,较LL分别提高19.4%和11.1%;LL+AMF和LL+ZNC番茄幼苗根系活力及可溶性糖含量较LL分别提高22.7%、14.8%和31.9%、26.9%。综上所述,本试验条件下AMF和ZNC可通过提高黄瓜和番茄幼苗抗氧化酶活性以及渗透调节能力,减轻低温弱光造成的植株膜脂过氧化水平,进而缓解对黄瓜和番茄幼苗的生长抑制。展开更多
文摘The effects of biochar(BC),arbuscular mycorrhizal fungi(AM),nitrogen(N)and their composite treatments(BC+N,AM+N,BC+AM and BC+AM+N)application on Cichorium intybus L.(C.intybus L.)nutrient uptake,soil properties and cadmium(Cd)accumulation were investigated in Cd contaminated soil(0.11 mg·kg^(-1)).The results showed that the addition of BC increased the rate of mycorrhizal infection.However,the addition of N slightly inhibited mycorrhizal colonization,and the shoot and root bioaccumulation of chicory was positively influenced by BC and N when inoculated with AM fungi.Compared with the single component treatment(AM,BC or N)or two-component treatment(BC+N,AM+N or BC+AM),the three-component composite treatment(BC+AM+N)had the highest shoot bioaccumulation,whereas BC+AM treatment was considered the best for root biomass bioaccumulation.Compared with the control treatment,the single component treatment(AM,BC or N)and the composite treatment resulted in an overall improvement of the chicory shoot,root related nutrient uptake(N,P,K,Mg,Ca,Mn and Fe)and some soil physicochemical properties;in addition,these treatments showed better results than BC+AM+N and BC+AM treatments.Among the Cd-related indexes,Cd concentrations in the shoot,root and soil of C.intybus L.were reduced through treatment with AM and BC.However,a lower bioconcentration coefficient(BCF)and a higher transfer coefficient(TF)were observed in both treatments,and the most desirable effect was observed following the combination treatment(BC+AM).Compared with other single management,the shoot and root Cd concentrations of C.intybus L.after the management of N alone were higher,and the value of BCF(2.63%)was higher,but the value of TF(1.05%)was lower.Indexes related to Cd improved concurrently following the application of N in combination with BC or AM.Therefore,in Cd contaminated soils,single or combined application of BC,AM and N could promote chicory growth and nutrient uptake and improve some soil physicochemical properties.However,N should not be applied alone and needed to be combined with AM and BC;furthermore,it was evident that the treatment with the three composites(BC+AM+N)was optimal from an application point of view.
文摘本试验以黄瓜‘新泰密刺’和番茄‘D2856’为试材,研究在低温弱光(15℃/8℃,80μmol·m^(-2)·s^(-1),low temperature and low light,LL)下,丛枝菌根真菌(Arbuscular mycorrhizal fungi,AMF)和宛氏拟青霉(Paecilomyces variotii)提取物智能聪(ZNC)对黄瓜和番茄幼苗生长及其抗氧化系统活性的影响。幼苗两叶一心时LL处理7 d,LL下根施基质重量比1%AMF(LL+AMF)和喷施10 mL 10 ng·mL^(-1) ZNC(LL+ZNC),以正常温光为对照(28℃/18℃,600μmol·m^(-2)·s^(-1),CK)。结果表明,与CK相比,LL显著降低黄瓜和番茄壮苗指数和根系活力,抑制植株生长,且黄瓜和番茄幼苗SOD、POD活性及可溶性糖和蛋白含量增加,说明LL引起植株膜脂过氧化。LL下施用AMF和ZNC显著提高黄瓜和番茄的可溶性糖含量以及POD和CAT活性。其中,LL下施用AMF和ZNC黄瓜的壮苗指数显著提高,较LL分别提高19.4%和11.1%;LL+AMF和LL+ZNC番茄幼苗根系活力及可溶性糖含量较LL分别提高22.7%、14.8%和31.9%、26.9%。综上所述,本试验条件下AMF和ZNC可通过提高黄瓜和番茄幼苗抗氧化酶活性以及渗透调节能力,减轻低温弱光造成的植株膜脂过氧化水平,进而缓解对黄瓜和番茄幼苗的生长抑制。
