Effect of rice straw on the composition of volatile soil gas and micro flora in the tropical paddy field

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

“…3 and 4, it is presumed that at least several kinds of microorganisms are involved in the degradation of MCPA and 2,4-D, and the promotive effect of P on the degradation of these chemicals may differ according to the kind of microbes. Amendments of rice straw, N-and P-fertilizer to soil have been reported to affect the composition of various groups of microorganisms in soil (2,10). The application of P may qualitatively and quantitatively change the growth of some groups of microorganisms including herbicide-degrading forms.…”

Biochemical Characteristics of Thionic Fluvisol Linked to Land Use Types in Southern Vietnam

“…Different batches of soil samples for isolating and identifying microbes capable of transforming or oxidizing iron and sulfur were also collected from O and AB soil layers of the same soil sampling points in each land use type (Araragi & Tangcham 1979;Nguyen & Phan 1992). Isolation of sulfur-oxidizing microbes was carried out based on methods described by Rajagopal and Sridar (2007), using the Starkey and Thiosulfate culture media.…”

“…Vegetation density and composition reflect soil biological property and fertility depending on soil location, type and depth (Dang 2009). At et al soil depth of 0 -22 cm, microbial density could reach 232 x 10 CFU/g, however, vegetation 5 density was much lower at soil depth higher than 55 cm (Araragi & Tangcham 1979). Hitomo & Naoto (2005) identified four species of Thiomonas genus that could reduce sulfur from paddy rice in Sado Island of Japan, including T. cuprina, T. intermedia, T. perometabolis T. thermosulfate.…”

Advances in Soil Science

“…Schmeer (1983) suggested that such anaerobic conditions hardly occur in arable upland soils but may prevail in flooded soils. Thus, Araragi and Tangcham (1979), when investigating gas release under rice in a paddy field, found that in the treatment with straw incorporation, the N2 release by the soil was about 5 to 10 times higher than in the treatment without straw. NH/ fertilizer, however, had no major effect on the N2 release.…”