Location: Delta Water Management Research
Project Number: 6024-13000-004-086-S
Project Type: Non-Assistance Cooperative Agreement
Start Date: Jun 25, 2024
End Date: Jun 30, 2026
Objective:
1. To quantify seasonal N2O, CO2, and CH4 emissions for systems amended with and without silicate rock dust under alternate wetting & drying (AWD) and conventional flood irrigation.
2. To assess grain yield in flooded and AWD irrigation with and without silicate rock dust.
3. To quantify the concentrations of B, Zn and inorganic As in rice grain produced by silicate rock amended rice-soil systems to those of the control.
Approach:
We propose that two approaches be used to investigate the behavior of silicate rock amendments in flooded rice culture: (1) Rice agronomics field study. Two in situ studies featuring rice grown in containers installed in a rice field to study the impact of the silicate rock amendment on rice agronomics and methane production, and (2) Batch soil slurry study. A laboratory soil incubation study (no rice present) to investigate the impact of the silicate rock amendment on soil chemistry and soil microbiology (as measured by CH4 and CO2 production). The field study will be conduced in two locations; one field trial in Northeast Arkansas and another one in the experimental field of the International Rice Research Institute and University of the Philippines in Los Baños, Laguna Philippines.
