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- W2390174863 abstract "The paper is aimed to introduce its safety assessment results of the residual dynamics of chlorpyrifos in banana and orchard soils,for bananas should be protected from being harmed by the pesticide residue like chlorpyrifos as one of the main tropic plants in the botanic world. For our research purpose,we have chosen the residue of chlorpyrifos in the bananas and orchard soil samples by using GC and field experiments in Zhangzhou,Fujian. And,then,we have detected the residue by using the methods of NY / T 761—2008 and GB / T 14552—2003. The field experiments we have done indicate that,when 540. 00 g / hm2( the recommended dosage) and 1 080. 00 g / hm2( double recommended dosage) of chlorpyrifos were sprayed for twice on the bananas whereas 9. 600 g / m2 of chlorpyrifos were sprayed for once in the soil,the original residues of chlorpyrifos should account for 1. 564 mg / kg,2. 364 mg / kg and 6. 520 mg / kg,respectively. What is more,we have found that the chlorpyrifos degradation ratio was between the bananas and the field soils as high as to 95. 97%,96. 32% and 96. 47%,respectively,as a result of 21 days' degradation due to the latest application of chlorpyrifos. At the same time,we have found that it is necessary to describe the residual degradation dynamics of chlorpyrifos via the first order kinetic equation model,whereas it is recommended to use the equation of the dosage and double dosage of chlorpyrifos,which can be shown as follows: y = 1. 0724e- 0. 1449 tand y = 1. 7840e- 0. 1468 tin bananas,and y = 6. 4365e- 0. 1412 tin the soils. Furthermore,we have worked out that the residual half-life( T1 /2) of chlorpyrifos in the bananas and soils should be 4. 8 d and 4. 9 d. The time for degrading( T0. 99) is a period of time between 31. 4-31. 8 d and even 32. 7d. When all the measures have been done,the final residue of chlorpyrifos in the bananas and the orchard soil can hardly be detected( the detection limit is 0. 005 mg / kg),60-68 days later since the last application. Making a rational use of chlorpyrifos in bananas,the residue could be made well in accord with the demand of the maximum residue level( MRL) in NY / T 750—2011." @default.
- W2390174863 created "2016-06-24" @default.
- W2390174863 creator A5063535453 @default.
- W2390174863 date "2015-01-01" @default.
- W2390174863 modified "2023-09-27" @default.
- W2390174863 title "Residual dynamics and safety assessment of chlorpyrifos in banana and orchard soil" @default.
- W2390174863 hasPublicationYear "2015" @default.
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