BEHAVIOUR AND FATE OF 14C-2,4-DICHLOROPHENOXYACETIC ACID IN MALAYSIAN RICE MODEL AGROECOSYSTEM LYSIMETERS
Journal Title: Journal of Advances in Internal Medicine - Year 2011, Vol 2, Issue 2
Abstract
Behavior and fate of 14C-2,4-dichlorophenoxyacetic acid (2,4-D) was studied in a Malaysian rice model agroecosystem. This model agroecosystem that consists of ricefield soil obtained from the Muda rice granary area, rice crop (Oryza sativa var. indica cv. Telok Kecai) and stream water; was set-up in a lysimeter system in the radioactive glasshouse. Radioactivity of Carbon-14 labeled 2,4-D were analyzed in water, soil, weed and rice crop by using the Liquid Scintillation Counting (LSC) technique. The level of radioactivity was monitored in surface water until 74 days after application (DAA). Radioactivity in surface water declined very rapidly. At 1 DAA, 77.7 x 10-3% of the total applied radioactivity was measured in surface water, which declined to 8.9 x 10-3% at 4 DAA, 1.1 x 10-3% at 6 DAA, and 0.7 x 10-3% at 8 DAA. Radioactivity in surface water stabilized but fluctuated between 0.1 x 10-3% and 0.6 x 10-3% of the total applied radioactivity, from 11 DAA until 74 DAA. Under the tropical climate of Malaysia, the half-life of 2,4-D herbicide in ricefield water was less than 4 days. The order of importance of bioconcentration value was in weed>rice root>rice leaf. Means of bioconcentration values calculated were 51.30 + 11.65 in the rice leaf, 127.85 + 46.76 in the rice root, and 362.69 + 286.30 in weed plants. 2,4-dichlorophenoxyacetic acid herbicide was taken up by weed more than rice root and leaf at 74 DAA.
Authors and Affiliations
M. NASHRIYAH| Malaysian Nuclear Agency, Bangi 43000 Kajang, Selangor, MALAYSIA. She is now with the Universiti Sultan Zainal Abidin, Gong Badak Campus, Gong Badak, 21300 Kuala Terengganu, Terengganu, MALAYSIA., S. MISMAN| Malaysian Nuclear Agency, Bangi 43000 Kajang, Selangor, MALAYSIA., M. N. MAIZATUL| Malaysian Nuclear Agency, Bangi 43000 Kajang, Selangor, MALAYSIA., A. W. MUHAMAD AZHAR| Postgraduate student with the Universiti Sultan Zainal Abidin, Gong Badak Campus, Gong Badak, 21300 Kuala Terengganu, Terengganu, MALAYSIA., R. KUBIAK| Staatliche Lehr-und Forschungsanstalt fur Landwirtschaft, Weinbau und Gartenbau, Breitenweg, Neustadt an der Weinstrase, Germany.
Keywords
Related Articles
- EP ID EP4817
- DOI -
- Views 553
- Downloads 19
IDENTIFICATION OF STABLE GENOTYPES OF RAPESEED USING SOME PARAMETRIC AND NON-PARAMETRIC METHODS UNDER DRYLAND CONDITIONS
Rapeseed breeders aimed to develop varieties which perform relatively well over the target region. However the presence of genotype× environment (GE) hinders selection progress. This study was conducted on 20 improved ra...
Systemic Lupus Erythematosus presenting with Bullous lesion, Lupus Nephritis and Seizure
Development of bullous lesion is a rare cutaneous manifestation of systemic lupus erythematosus (SLE). Bullous eruptions in SLE are divided into three categories. Firstly, the lesions of SLE may blister. Secondly, a numb...
Changes in Heart Rate Variability and Glycosylated Hemoglobin in Prediabetics and Type 2 Diabetes Mellitus
Background: People with diabetes mellitus (DM) suffer from cardiac autonomic neuropathy (CAN), this may remain subclinical and reduced heart rate variability (HRV) is Objective: The present study was undertaken to invest...
GROWTH AND YIELD PERFORMANCE OF DIFFERENT EXOTIC STRAINS OF EIGHT PLEUROTUS SPECIES CULTIVATED ON TRIPLOCHITON SCLEROXYLON IN GHANA
The mycelia growth rate, physical characteristics of first flush, number of flushes and biological efficiency of twenty three exotic strains of eight Pleurotus species grown on composted sawdust of Triplochiton scleroxyl...
Prevalence of Helicobacter pylori infection, its correlation with gastroduodenal diseases and the incidence of gastric cancer in Nepal
Background and aims: The Helicobacter pylori (H. pylori) prevalence in Asian countries is highly variable, with higher seroprevalence shown in the previous studies of developing Asian countries. We aimed to determine the...