River Water Quality Monitoring at Paddy Field in Merlimau, Melaka

Abstract

Water is the main resource of rice cultivar input for growth development and yield production. The water quality can affect the rice yield. The aim of the study is to analyze the water quality at the rivers that are directly supplied to the paddy fields. The water quality of the river at Merlimau paddy field was tested using Cyberscan 600 series. The variables taken are pH, conductivity level, sodium chloride (NaCl) and resistivity level. The monitoring was conducted at three stages of the paddy cultivation process which are during land preparation, vegetative stage and maturing stage to see the variables supplied to the paddy fields. This study can help the farmers to know the state of water quality that has been used to irrigate the paddy field.

A Study of the Photodegradation Carbofuran and its Metabolites in Paddy Water Samples

“…During photolysis, rice plants take up carbon dioxide from the water and release oxygen, which can increase the pH of the water. As it occurs mainly during daylight hours, the pH of paddy water tends to increase during the day and decrease at night (Aisha et al 2022;Mustaffha and Sabran 2020). Further, this degradation pattern is more prominent in the early growing season before the canopy blocks sunlight from reaching the paddy water.…”

“…Pesticides can degrade and form metabolites in water, soil, and air. Degradation can occur through hydrolysis, photolysis, surface runoff, leaching, volatilization, oxidation or reduction, and microbial degradation (Lewis et al 2016;Nieder et al 2018).…”