Forage grasses cover crops of rice and maize to steer nitrogen processes and microbiome to mitigate greenhouse gases emissions in long-term tropical agriculture system

Project 2018–Present
Field

Details

Department
Microbial Ecology
Research group
Kuramae Group
Funding
FAPESP - Sao Paulo Research Foundation

The aim of this research is to understand how cover crop species combined with different times of N application affect the cover crop straw, nutrition and productivity of cash crop, soil chemical properties and soil microbial composition and function in a holistic approach of the entire agricultural system under tropical no-till system (Fig. 1). Focus is on microbiome that immediately respond to the N application disturbances and in a long period to the plant cultivation, N inputs and soil properties changes. We use 3-year field experiment with palisade grass and ruzigrass cover crops and subsequent maize cash crop combined with different N management strategies to quantify the microbial genes of the N cycle and the bacterial and fungal communities’ structure and composition in the agricultural system.  

experimental design
Letusa Momesso
Fig. 1. Scheme of tropical agriculture with maintenance of crop residues in no-till system.
Graases and N cycle
Letusa Momesso
Impact of cover crop species on microbiome and N cycle genes.
Optimizing cover crop and fertilizer timing for high maize yield and nitrogen cycle control
Letusa Momesso
Optimizing cover crop and fertilizer timing for high maize yield and nitrogen cycle control

Details

Department
Microbial Ecology
Research group
Kuramae Group
Funding
FAPESP - Sao Paulo Research Foundation

Experts

Palisade grass has advantages over ruzigrass for use as cover crop in agriculture systems, regardless of N input.