Effect of organic matter and chemical fertilizers on the degradation of benthiocarb and mcpa herbicides in the soil

Duah-Yentumi, Stephen; Kuwatsuka, Shozo

doi:10.1080/00380768.1980.10431241

Cited by 37 publications

(11 citation statements)

References 6 publications

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“…Such effects are the result of increased microbial activity at the expense of rhizodeposition by the plants in the form of sloughed offroot material and root exudates. Similarly, a positive effect of rice straw, compost and NPK fertilizers on the degradation of benthiocarb and MCPA herbicides has been demonstrated (Duah-Yentumi and Kuwatsuka, 1980). In the present study, wheat straw amendment almost doubled the amount of MBT-~4C mineralized to CO2 (Fig.…”

Section: Discussionsupporting

confidence: 50%

“…3). Other workers have also observed increased mineralization and decreased extractability of applied pesticides due to organic amendment (Duah-Yentumi and Kuwatsuka, 1980). In the present study, the bound residues after 15 weeks accounted for 5% of the applied radioactivity in unamended soil whereas in amended soil 25% of the initial ~4C was found in bound residues (Fig.…”

Section: Discussionmentioning

confidence: 62%

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Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

1988

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Abstract[Carbonyl-~4C] methabenzthiazuron (MBT) was applied to an arid region soil at a rate of 5 mg kg-~ soil to give a ~4C content of 2400 KB kg-~ soil. After 15 weeks of incubation at 22~ and 50% of the maximum water holding capacity of the soil, 7.2% of the applied ~4C was mineralized to ~4CO 2. Where the soil was amended with wheat straw, total mineralization increased to 17.3%. Soil disturbance caused a significant increase while chloroform fumigation caused a significant decrease in the rate of ~4CO2 production, both from amended and unamended soils. These results suggest that MBT is degraded mainly through microbial co-metabolism.Wheat straw amendment resulted in increased transformation of MBT into soil humus. In unamended soil, a major portion of ~4C was recovered in fulvic acid and in fractions extracted with organic solvents. Recovery of ~4C in non-extractable bound residues (humins) increased as incubation progressed and seemed to be derived from the fulvic acid fraction, which showed a concomitant decrease.More than 99% of the ~sidual ~4C in unamended soil consisted of unaltered MBT; the remainder occurred as 1-methyl-1 (benzthiazolyl) urea. In amended soil, a relatively higher percentage of the extractable ~4C was found in the metabolite. Small amounts of three unidentified ~4C-labelled compounds were also observed.In amended soil, disturbance caused a decrease in extractable-~4C whereas fumigation caused a significant increase, as compared to the untreated control. The effects were more pronounced when the soils were treated at an early stage of incubation. In general, soil disturbance increased the availability of MBT for further transformations while chloroform fumigation decreased the process.

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Section: Discussionsupporting

confidence: 50%

Section: Discussionmentioning

confidence: 62%

Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

1988

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“…Each 22.5 mg of N as urea, P as Na 2 HP0 4 , and K as KCI was added to 50 g of the soils at rates corresponding to 45 kg/10 a for each of N, P and K. The methods of preparation of the rice straw powder and rice straw compost were as described previously (8). The soils were placed in the column of the perfusion apparatus and con· tinuously circulated with 350 ml each of 16 ppm aqueous solutions of benthiocarb, 50 ppm MCPA or 50 ppm 2,4-D at a speed of 5 ml/min.…”

Section: Methodsmentioning

confidence: 99%

“…The effect of organic materials and chemical fertilizer amendments on herbicide degradation in soil was investigated using 14 C-benthiocarb and 14 C-MCPA in our previous study (8). The degradation of these herbicides in the soil was promoted by the amendment of these materials.…”

mentioning

confidence: 99%

Microbial degradation of benthiocarb, MCPA and 2,4-d herbicides in perfused soils amended with organic matter and chemical fertilizers

Yentumi

Kuwatsuka

1982

Soil Science and Plant Nutrition

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“…Compost addition has also been reported to improve degradation of two herbicides [benthiocarb (S-4-chlorobenzyl diethylthiocarbamate) and MCPA (4-chloro-2-methylphenoxyacetic acid)] in soil [81]. Mineralization of atrazine was enhanced by cocomposting with newsprint [82].…”

Section: S Singh and L Nainmentioning

confidence: 84%

Microorganisms in the Conversion of Agricultural Wastes to Compost

Singh¹,

Nain²

2014

Proceedings of the Indian National Science Academy

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Microorganisms play an important role in the recycling of agricultural wastes. The compost generated by bioconversion of agroresidues offers several benefits such as enhanced soil fertility and soil health which can lead to increased agricultural productivity, improved soil biodiversity, reduced ecological risks and a healthier environment. These virtues make composting an ideal option for processing of the enormous quantities of agrowastes that are generated in the world. Recent reports also indicate multifarious uses of bioaugmented compost as carrier for bioinoculants, biocontrol agents for diseases suppressivness and bioremediation. There is definite need to intensify research on novel effective microorganisms to prepare high quality compost in a relatively shorter duration and new technologies for large-scale production.

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Effect of organic matter and chemical fertilizers on the degradation of benthiocarb and mcpa herbicides in the soil

Cited by 37 publications

References 6 publications

Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

Microbial degradation of benthiocarb, MCPA and 2,4-d herbicides in perfused soils amended with organic matter and chemical fertilizers

Microorganisms in the Conversion of Agricultural Wastes to Compost

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