Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of Senegal
Abstract Rhizobial inoculation has been widely used in controlled conditions as a substitute for chemical fertilizers to increase plants growth and productivity. However, very little is known about such effects on mature trees in natural habitats. In this study, we investigated the effect of rhizobi...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2016-09-01
|
| Series: | Frontiers in Plant Science |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01355/full |
| _version_ | 1828279020287950848 |
|---|---|
| author | Dioumacor FALL Dioumacor FALL Niokhor Bakhoum Saidou Nourou Sall Alzouma Mayaki Zoubeirou Samba Ndao Sylla Diégane Diouf Diégane Diouf |
| author_facet | Dioumacor FALL Dioumacor FALL Niokhor Bakhoum Saidou Nourou Sall Alzouma Mayaki Zoubeirou Samba Ndao Sylla Diégane Diouf Diégane Diouf |
| author_sort | Dioumacor FALL |
| collection | DOAJ |
| description | Abstract Rhizobial inoculation has been widely used in controlled conditions as a substitute for chemical fertilizers to increase plants growth and productivity. However, very little is known about such effects on mature trees in natural habitats. In this study, we investigated the effect of rhizobial inoculation on soil total microbial biomass, mineral nitrogen content, potential CO2 respiration, fluorescein diacetate (FDA), acid phosphatase activities and gum arabic production by 13-years old Senegalia senegal (Syn. Acacia senegal) under natural conditions in the north part of Senegal during two consecutive years. Rhizobial inoculation was performed at the beginning of the rainy season (July) for both years with a cocktail of four strains (CIRADF 300, CIRADF 301, CIRADF 302 and CIRADF 303). Rhizospheric soils were collected in both dry and rainy seasons to a depth of 0-25 cm under uninoculated (UIN) and inoculated (IN) trees. Trees were tapped in November (beginning of dry season) using traditional tools. Gum arabic was harvested every 15 days from December to March. The results obtained from both years demonstrated that rhizobial inoculation increased significantly the percentage of trees producing gum arabic, gum arabic production per tree, soil microbial biomass, FDA and acid phosphatase activities. However, there was no significant effect on C mineralization and mineral nitrogen (N) content. Gum arabic production was positively correlated to rainfall, soil microbial biomass and mineral nitrogen content. Our results showed a positive effect of rhizobial inoculation on soil microbial functioning and gum arabic production by mature S. senegal trees. These important findings deserve to be conducted in several contrasting sites in order to improve gum arabic production and contribute to increase rural population incomes. |
| first_indexed | 2024-04-13T07:37:47Z |
| format | Article |
| id | doaj.art-351a9dbc26784e8f82a1916bcef68394 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-04-13T07:37:47Z |
| publishDate | 2016-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-351a9dbc26784e8f82a1916bcef683942022-12-22T02:56:02ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2016-09-01710.3389/fpls.2016.01355204576Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of SenegalDioumacor FALL0Dioumacor FALL1Niokhor Bakhoum2Saidou Nourou Sall3Alzouma Mayaki Zoubeirou4Samba Ndao Sylla5Diégane Diouf6Diégane Diouf7Institut Sénégalais de Recherches Agricoles (ISRA)LMI-LAPSEInstitut Sénégalais de Recherches Agricoles (ISRA)Université Gaston BergerUniversité Abdou MoumouniUniversité Cheikh Anta DIOP de Dakar (UCAD)LMI-LAPSEUniversité Cheikh Anta DIOP de Dakar (UCAD)Abstract Rhizobial inoculation has been widely used in controlled conditions as a substitute for chemical fertilizers to increase plants growth and productivity. However, very little is known about such effects on mature trees in natural habitats. In this study, we investigated the effect of rhizobial inoculation on soil total microbial biomass, mineral nitrogen content, potential CO2 respiration, fluorescein diacetate (FDA), acid phosphatase activities and gum arabic production by 13-years old Senegalia senegal (Syn. Acacia senegal) under natural conditions in the north part of Senegal during two consecutive years. Rhizobial inoculation was performed at the beginning of the rainy season (July) for both years with a cocktail of four strains (CIRADF 300, CIRADF 301, CIRADF 302 and CIRADF 303). Rhizospheric soils were collected in both dry and rainy seasons to a depth of 0-25 cm under uninoculated (UIN) and inoculated (IN) trees. Trees were tapped in November (beginning of dry season) using traditional tools. Gum arabic was harvested every 15 days from December to March. The results obtained from both years demonstrated that rhizobial inoculation increased significantly the percentage of trees producing gum arabic, gum arabic production per tree, soil microbial biomass, FDA and acid phosphatase activities. However, there was no significant effect on C mineralization and mineral nitrogen (N) content. Gum arabic production was positively correlated to rainfall, soil microbial biomass and mineral nitrogen content. Our results showed a positive effect of rhizobial inoculation on soil microbial functioning and gum arabic production by mature S. senegal trees. These important findings deserve to be conducted in several contrasting sites in order to improve gum arabic production and contribute to increase rural population incomes.http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01355/fullGum Arabicplant productivityRhizobiamineralizationsoil fertilityArid regions |
| spellingShingle | Dioumacor FALL Dioumacor FALL Niokhor Bakhoum Saidou Nourou Sall Alzouma Mayaki Zoubeirou Samba Ndao Sylla Diégane Diouf Diégane Diouf Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of Senegal Frontiers in Plant Science Gum Arabic plant productivity Rhizobia mineralization soil fertility Arid regions |
| title | Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of Senegal |
| title_full | Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of Senegal |
| title_fullStr | Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of Senegal |
| title_full_unstemmed | Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of Senegal |
| title_short | Rhizobial inoculation increases soil microbial functioning and gum arabic production of 13-years old Senegalia senegal (L.) Britton, trees in the North part of Senegal |
| title_sort | rhizobial inoculation increases soil microbial functioning and gum arabic production of 13 years old senegalia senegal l britton trees in the north part of senegal |
| topic | Gum Arabic plant productivity Rhizobia mineralization soil fertility Arid regions |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01355/full |
| work_keys_str_mv | AT dioumacorfall rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal AT dioumacorfall rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal AT niokhorbakhoum rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal AT saidounourousall rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal AT alzoumamayakizoubeirou rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal AT sambandaosylla rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal AT dieganediouf rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal AT dieganediouf rhizobialinoculationincreasessoilmicrobialfunctioningandgumarabicproductionof13yearsoldsenegaliasenegallbrittontreesinthenorthpartofsenegal |