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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Early nitrogen supply as an alternative management for a cover crop-maize sequence under a no-till system

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Momesso, Letusa [1, 2, 3] ; Crusciol, Carlos A. C. [3] ; Soratto, Rogerio P. ; Nascimento, Carlos A. C. [4] ; Rosolem, Ciro A. ; Moretti, Luiz G. ; Kuramae, Eiko E. [1, 2] ; Cantarella, Heitor [5]
Total Authors: 8
[1] Netherlands Inst Ecol, Dept Microbial Ecol, Droevendaalsesteeg 10, NL-6708 PB Wageningen - Netherlands
[2] Univ Utrecht, Inst Environm Biol, Ecol & Biodivers, Padualaan 8, NL-3584 CH Utrecht - Netherlands
[3] Sao Paulo State Univ UNESP, Coll Agr Sci, Dept Crop Sci, Ave Univ, 33789, Lageado Expt Farm, BR-18610034 Botucatu, SP - Brazil
[4] Univ Sao Paulo USP ESALQ, Ave Padua Dias 235, BR-13418900 Piracicaba, SP - Brazil
[5] Agron Inst Campinas IAC, Ave Barao de Itapura 1481, BR-1307630 Campinas, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Web of Science Citations: 1

Optimizing agronomic efficiency (AE) of nitrogen (N) fertilizer use by crops and enhancing crop yields are challenges for tropical no-tillage systems since maintaining crop residues on the soil surface alters the nutrient supply to the system. Cover crops receiving N fertilizer can provide superior biomass, N cycling to the soil and plant residue mineralization. The aims of this study were to (i) investigate N application on forage cover crops or cover crop residues as a substitute for N sidedressing (conventional method) for maize and (ii) investigate the supply of mineral N in the soil and the rates of biomass decomposition and N release. The treatments comprised two species, i.e., palisade grass {[}Urochloa brizantha (Hochst. Ex A. Rich.) R.D. Webster] and ruzigrass {[}Urochloa ruziziensis (R. Germ. and C.M. Evrard) Crins], and four N applications: (i) control (no N application), (ii) on live cover crops 35 days before maize seeding (35 DBS), (iii) on cover crop residues 1 DBS, and (iv) conventional method (N sidedressing of maize). The maximum rates of biomass decomposition and N release were in palisade grass. The biomass of palisade grass and ruzigrass were 81 and 47% higher in N application at 35 DBS compared with control in ruzigrass (7 Mg ha(-1)), and N release followed the pattern observed of biomass in palisade and ruzigrass receiving N 35 DBS (249 and 189 kg N ha(-1)). Mineral N in the soil increased with N application regardless of cover crop species. Maize grain yields and AE were not affected when N was applied on palisade grass 35 DBS or 1 DBS (average 13 Mg ha(-1) and 54 kg N kg(-1) maize grain yield) compared to conventional method. However, N applied on ruzigrass 35 DBS decreased maize grain yields. Overall, N fertilizer can be applied on palisade grass 35 DBS or its residues 1 DBS as a substitute for conventional sidedressing application for maize. (AU)

FAPESP's process: 15/50305-8 - A virtual joint centre to deliver enhanced nitrogen use efficiency via an integrated soil-plant systems approach for the UK & Brazil
Grantee:Ciro Antonio Rosolem
Support type: Research Projects - Thematic Grants
FAPESP's process: 16/12317-7 - Nucleus: a virtual joint centre to deliver enhanced nitrogen use efficiency via an integrated soil-plant systems approach for the UK and Brazil
Grantee:Carlos Antonio Costa Do Nascimento
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/17953-6 - Nitrogen antecipation for upland rice crops in succession to Urochloa brizantha and Urochloa ruziziensis in no-till system
Grantee:Aron Aielo Sandoval
Support type: Scholarships in Brazil - Scientific Initiation