Grain yield optimisation in the Plain of Reeds in the context of climate variability

T. A. Dang

doi:10.1590/1807-1929/agriambi.v25n9p591-596

Abstract

ABSTRACT The Plain of Reeds is a large floodplain in the Mekong Delta, where natural disasters such as droughts, off-season rainfall and floods have dramatically increased, leading to declining in crop yields. The objective of this study was to evaluate the adverse impacts of climate factors (ICF) on grain yield of the main growing crops in the Plain of Reeds to define the suitable cultivation period (SCP) for rice-growing areas as an adaptation solution to minimise the adverse impacts of climate factors. To conduct this research, a crop model was applied to define the suitable cultivation periods based on simulating the grain yields of each rice-growing season. When the suitable cultivation periods were deployed, the grain yield of all simulated growing crops improved significantly compared to the current cultivation periods (baseline), which, for the main growing crops in the Plain of Reeds, are no longer suitable for the current weather conditions that have been deeply affected by climate variability in recent years.

Highlights

Material and MethodsIn recent decades, global climate variability has changed climate factors in most parts of the world (Shrestha et al, 2016)
The objective of this study was to evaluate the adverse impacts of climate factors (ICF) on grain yield of the main growing crops in the Plain of Reeds to define the suitable cultivation period (SCP) for rice-growing areas as an adaptation solution to minimise the adverse impacts of climate factors
A crop model was applied to define the suitable cultivation periods based on simulating the grain yields of each rice-growing season

Summary

Introduction

Global climate variability has changed climate factors in most parts of the world (Shrestha et al, 2016). Precipitation is assessed to change significantly under the impacts of climate factors (ICF) (Kontgis et al, 2019). Variation in precipitation results in water shortages for irrigation in the dry growing crops whereas flooding of the wet growing crops causing a decline in grain yield (Dang, 2020). Climate variability has affected approximately 7.0% of the total agricultural land area of Vietnam due to drought, extreme precipitation and flooding. Shah et al (2011) indicated that precipitation is one of the major climate factors that directly affect agricultural activities as well as crop yields Climate variability has affected approximately 7.0% of the total agricultural land area of Vietnam due to drought, extreme precipitation and flooding. Shah et al (2011) indicated that precipitation is one of the major climate factors that directly affect agricultural activities as well as crop yields

Objectives

Results

Conclusion