Chapter 17: Agriculture practices to improve soil carbon sequestration in rice paddy soils

Part 3: Fostering carbon sequestration in soils

Cambridge

2023

Artikel aus einem Buch

18273BU

200210345

Carbon sequestration potential of rice paddy soils; Methane production, oxidateion and emissions in rice paddy soils; Nitrous oxide emissions in rice paddy soils; Evaluation of the net global warming potential and greenhouse gas intensity of rice paddy soils; Effect of water management on global warming potential of rice paddy soils; Effect of green manure management on global warming potential of rice paddy soils; Effect of straw management on global warming potential of rice paddy soils; Effect of fertilizer management on global warming potential of rice paddy soils; Effect of soils amendments on global warming potential of rice paddy soils; Effect of biochar and compost addition on global warming potential of rice paddy soils.Rice is a nutritious staple crop for over half of the global population, even though rice fields cover only 9% of global cropland. Rice paddies are widely distributed from tropical to temperate climatic regions on all continents (except Antarctica), with high concentrations in South-East Asia. Global rice demand is predicted to grow by around 28% by 2050 compared to early 2000s. Paddy rice soils are important carbon (C) sinks, compared with upland soils, since the anaerobic conditions in flooded rice paddies slow down organic matter (OM) decomposition, consequently favoring soil organic carbon (SOC) stock increases. However, due to cultivation under submerged conditions, rice cropping fields act as a major greenhouse gas (GHG) emission sources in the form of methane and nitrous oxide.