Bispyribac Sodium Persistence in Soil, Plant and Grain in Direct Seeded Rice and its Effect on Soil Properties

A field experiment on direct-seeded rice was conducted during kharif 2011 and 2012 at the College Farm, ANGRAU Hyderabad, to study the influence of different doses of bispyribac sodium 10% SC (10, 15, 20, 25 and 40 g a.i/ha) on physical, physico-chemical and fertility properties of the soil. Persist...

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Bibliographic Details
Published in:Nature environment and pollution technology 2015-09, Vol.14 (3), p.605-605
Main Authors: Ramprakash, T, Madhavi, M, Yakadri, M, Srinivas, A
Format: Article
Language:English
Subjects:
Amino acids
Carbon
Experiments
Herbicides
Sodium
Soil fertility
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Summary:A field experiment on direct-seeded rice was conducted during kharif 2011 and 2012 at the College Farm, ANGRAU Hyderabad, to study the influence of different doses of bispyribac sodium 10% SC (10, 15, 20, 25 and 40 g a.i/ha) on physical, physico-chemical and fertility properties of the soil. Persistence of the herbicide in soil from application to harvest of the crop and the residues in plant samples at harvest were also studied. No significant changes in physical (texture, bulk density, particle density, pore space, maximum water holding capacity), physico-chemical (pH, EC, CEC, organic carbon) and fertility properties of the soil (available N, P^sub 2^O^sub 5^ and K^sub 2^O) were noticed at any of the applied doses. Bispyribac sodium dissipation in soil followed a first-order decay process. Half-life (DT^sub 50^) of bispyribac sodium was 13.10 days, 10.21 days and 9.93 days at 40 g/ha, 25 g/ha and 20 g/ha doses respectively. DT^sub 90^ values were also calculated. No detectable residues of bispyribac sodium were found in the straw or grain at the time of harvest.
ISSN:0972-6268
2395-3454