A field experiment was carried out in arid area to assess the influence of mycorrhizal inoculation with a native complex and bio-compost addition on establishment of Argania spinosa. The experimental area was located ...A field experiment was carried out in arid area to assess the influence of mycorrhizal inoculation with a native complex and bio-compost addition on establishment of Argania spinosa. The experimental area was located in the Admine forest at Agadir (Southwestern Morocco). The results showed a positive effect of arbuscular mycorrhizal fungi (AMF) on the growth of Argania spinosa seedlings in the nursery. Six months after planting, the mycorrhizal complex revealed an increase in the growth of Argan seedlings (51%) compared to non mycorrhizal plants. In the field conditions, after one year of transplantation, this benefit was maintained. Results showed that the height of Argan seedlings treated with AMF was double that of the control group. An additional positive effect of inoculation with AMF on plant biomass was observed and it was closely related to colonization by these microorganisms. There was an estimated 169% increase in biomass compared to control plants. The use of bio-compost alone or in combination with AMF improved the production of shoot biomass of Argan plants (84% and 108% respectively compared to control plants). In addition, AMF improved the survival rate and the contents of nitrogen (N) and phosphorus (P) in the tissues of A. spinosa plants. A significant positive correlation between dry biomass and nutrient content in plant tissue was detected. The content of (P) in the leaves and roots of inoculated plants was higher than those in non-inoculated and planted seedlings in amended soils. This result reaffirms the prime necessity of mycorrhiza in arid conditions. Thus the introduction of mycorrhizal fungi in forest nurseries is a key tool to improve the quality of seedlings produced and their resistance in reforestation sites.展开更多
为探讨堆肥初始物料对腐熟堆肥溶解性有机质(DOM)的Fe^(3+)生物还原强化效应的影响,本研究提取了不同物料腐熟堆肥(包括猪粪PM、鸡粪CM、蚕沙SE、木薯渣CR、厨余垃圾KW、污泥SS)及泥炭土(PS)的DOM,分析其光谱特征(紫外光谱、红外光谱和...为探讨堆肥初始物料对腐熟堆肥溶解性有机质(DOM)的Fe^(3+)生物还原强化效应的影响,本研究提取了不同物料腐熟堆肥(包括猪粪PM、鸡粪CM、蚕沙SE、木薯渣CR、厨余垃圾KW、污泥SS)及泥炭土(PS)的DOM,分析其光谱特征(紫外光谱、红外光谱和三维荧光光谱)、电子转移能力(ETC)及Fe^(3+)生物还原强化效果。结果表明:PM、CM、SE和SS中DOM含有更多的芳香结构、醌基官能团和更少的类木质素含量;CR中DOM含有更多的微生物类腐殖质组分(C2),CM和SS中DOM含有更多的类色氨酸组分(C4);6种物料堆肥DOM的电子转移能力总体略低于PS(EAC+EDC,628.42~720.57µmol·g^(-1)vs 710.37µmol·g^(-1)),其中SE>PM>CR>KW>CM>SS;SS、CM和SE中DOM在0~2 d内对Fe^(3+)的还原速率有显著的促进作用,相比于空白处理组分别提高了31.57、25.39倍和22.60倍;相关性分析表明,SUVA_(254)×C4、SUVA_(436)×C4指标与0~2 d Fe^(3+)还原速率呈显著性正相关(P=0.05),而类木质素含量与之呈显著负相关。SS、CM和SE物料的腐熟堆肥具有较多醌类结构的类色氨酸组分,使其具有较高的在Fe^(3+)/Fe^(2+)和希瓦氏菌MR-1之间的电子转移能力,从而提高Fe^(3+)生物还原强化效应。展开更多
文摘A field experiment was carried out in arid area to assess the influence of mycorrhizal inoculation with a native complex and bio-compost addition on establishment of Argania spinosa. The experimental area was located in the Admine forest at Agadir (Southwestern Morocco). The results showed a positive effect of arbuscular mycorrhizal fungi (AMF) on the growth of Argania spinosa seedlings in the nursery. Six months after planting, the mycorrhizal complex revealed an increase in the growth of Argan seedlings (51%) compared to non mycorrhizal plants. In the field conditions, after one year of transplantation, this benefit was maintained. Results showed that the height of Argan seedlings treated with AMF was double that of the control group. An additional positive effect of inoculation with AMF on plant biomass was observed and it was closely related to colonization by these microorganisms. There was an estimated 169% increase in biomass compared to control plants. The use of bio-compost alone or in combination with AMF improved the production of shoot biomass of Argan plants (84% and 108% respectively compared to control plants). In addition, AMF improved the survival rate and the contents of nitrogen (N) and phosphorus (P) in the tissues of A. spinosa plants. A significant positive correlation between dry biomass and nutrient content in plant tissue was detected. The content of (P) in the leaves and roots of inoculated plants was higher than those in non-inoculated and planted seedlings in amended soils. This result reaffirms the prime necessity of mycorrhiza in arid conditions. Thus the introduction of mycorrhizal fungi in forest nurseries is a key tool to improve the quality of seedlings produced and their resistance in reforestation sites.
文摘为探讨堆肥初始物料对腐熟堆肥溶解性有机质(DOM)的Fe^(3+)生物还原强化效应的影响,本研究提取了不同物料腐熟堆肥(包括猪粪PM、鸡粪CM、蚕沙SE、木薯渣CR、厨余垃圾KW、污泥SS)及泥炭土(PS)的DOM,分析其光谱特征(紫外光谱、红外光谱和三维荧光光谱)、电子转移能力(ETC)及Fe^(3+)生物还原强化效果。结果表明:PM、CM、SE和SS中DOM含有更多的芳香结构、醌基官能团和更少的类木质素含量;CR中DOM含有更多的微生物类腐殖质组分(C2),CM和SS中DOM含有更多的类色氨酸组分(C4);6种物料堆肥DOM的电子转移能力总体略低于PS(EAC+EDC,628.42~720.57µmol·g^(-1)vs 710.37µmol·g^(-1)),其中SE>PM>CR>KW>CM>SS;SS、CM和SE中DOM在0~2 d内对Fe^(3+)的还原速率有显著的促进作用,相比于空白处理组分别提高了31.57、25.39倍和22.60倍;相关性分析表明,SUVA_(254)×C4、SUVA_(436)×C4指标与0~2 d Fe^(3+)还原速率呈显著性正相关(P=0.05),而类木质素含量与之呈显著负相关。SS、CM和SE物料的腐熟堆肥具有较多醌类结构的类色氨酸组分,使其具有较高的在Fe^(3+)/Fe^(2+)和希瓦氏菌MR-1之间的电子转移能力,从而提高Fe^(3+)生物还原强化效应。
