leaked from roots normally include carbohydrates, organic
acids, and amino acids (Vancura and Hovadik, 1965). As a
result, those water management systems that involve water
regimes different from continuously flooded management
(absence of flooding in total or part of the growing period)
present lowerCH4 emissions compared with the continuously
flooded management system independent from the amount
of organic matter incorporated. The meta-analysis confirms
that water management practices have a strong influence on
the process involved in CH4 emission from rice fields