| Full text | |
| Author(s): Show less - |
Galindo, Fernando Shintate
[1]
;
da Silva, Edson Cabral
[2]
;
Pagliari, Paulo Humberto
[3]
;
Fernandes, Guilherme Carlos
[1]
;
Rodrigues, Willian Lima
[1]
;
Campos Biagini, Antonio Leonardo
[1]
;
Baratella, Eduardo Bianchi
[1]
;
da Silva Junior, Castro Alves
[1]
;
Moretti Neto, Mario Joao
[1]
;
Silva, Vinicius Martins
[1]
;
Muraoka, Takashi
[4]
;
Minhoto Teixeira Filho, Marcelo Carvalho
[1]
Total Authors: 12
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Dept Plant Hlth Rural Engn & Soils, Coll Engn, BR-15385000 Ilha Solteira, SP - Brazil
[2] Goiano Fed Inst, Rio Verde Campus, BR-75901970 Rio Verde, Go - Brazil
[3] Univ Minnesota, Southwest Res & Outreach Ctr, Dept Soil Water & Climate, Lamberton, MN 56152 - USA
[4] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416000 Piracicaba, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | APPLIED SOIL ECOLOGY; v. 157, JAN 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
A better understanding of nitrogen (N) behavior and agronomic practices is needed to improve biological nitrogen fixation (BNF) and N use efficiency under field conditions. This study aims on investigating the potential for the use of biological agents that can fix atmospheric N and are related to multiple mechanisms benefits to improve cowpea (Vigna unguiculata (L.) Walp.) development and productivity, leading to a positive residual effect on wheat (Triticum aestivum L.) development. The study was set up under a no-till system in a Rhodic Haplustox, in a randomized complete block design, with four replicates. Treatments were tested in a full factorial design and included: i) three types of inoculation (without inoculation - control; Bradyrhizobium sp. inoculation (strains SEMIA 6462 and SEMIA 6463) - the conventional inoculation of cowpea; and Bradyrhizobium sp. combined with A. brasilense (strains Ab-V5 and Ab-V6) - the co-inoculation); and ii) five N rates (0 to 160 kg N ha(-1)) applied as urea-N-15 isotope. The residual effects of inoculations and N application rates applied during the cowpea growing season were evaluated on wheat (successor crop). Co-inoculation was found to increase cowpea grain yield by 40.5% and 14.1% compared to the control and Bradyrhizobium sp. inoculation when N was omitted and up to 37.6% and 50.8% when N was applied. Coinoculation increased N use efficiency, N recovery and N accumulation on cowpea, leading to improved crop growth. The co-inoculation also provided a positive residual effect on wheat resulting in increased plant N accumulation, crop development, and greater wheat grain yield compared to the control (increase of 7.8%) and Bradyrhizobium sp. inoculated plants (increase of 5.8%). Co-inoculation was found to increase N use efficiency on cowpea by 216.5% and 35.5% and on wheat by 159.3% and 29.5% compared to control and Bradyrhizobium sp. inoculation, respectively. The fertilizer N recovery was, on average, 22.2% by cowpea, while fertilizer N recovery by wheat was < 2.3%. The percentage of N accumulated on cowpea was on average 30.8%, while the residual cowpea N contribution to wheat provided by co-inoculation was 18.6%. This study showed positive improvements in cowpea-wheat growth production parameters and N management as a result of co-inoculation, indicating that there is an opportunity to reduce N fertilizer input with the combined use of biological agents that promote plant growth and chemical fertilizers. (AU) | |
| FAPESP's process: | 18/08485-7 - Nitrogen management in cowpea bean, wheat and corn: effects on plant nutrition, grain yield, and nitrogen use efficiency |
| Grantee: | Fernando Shintate Galindo |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |