scholarly journals Increased Methylmercury Accumulation in Rice after Straw Amendment

2019 ◽  
Vol 53 (11) ◽  
pp. 6144-6153 ◽  
Author(s):  
Wenli Tang ◽  
Holger Hintelmann ◽  
Baohua Gu ◽  
Xinbin Feng ◽  
Yurong Liu ◽  
...  
Keyword(s):  
Straw Amendment

Paddy Soil Profile Distribution of δ13C Subjected to Rice Straw Amendment and Burning

2019 ◽  
Vol 886 ◽  
pp. 3-7 ◽  
Author(s):  
Wutthikrai Kulsawat ◽  
Boonsom Porntepkasemsan ◽  
Phatchada Nochit
Keyword(s):  
Organic Carbon ◽  
Paddy Soil ◽  
Soil Profile ◽  
Management Practices ◽  
Soil Depth ◽  
Animal Health ◽  
Soil Samples ◽  
Residue Management ◽  
Straw Amendment ◽  
Stubble Burning

Paddy residues are the most generous agricultural biomass from the paddy cultivation, Paddy residues practices include crop residue amendment and in-situ burning. It indicated that residue amendment increased the organic carbon and nutrient contents in soil, However, an open residue burning is still a common practice in Thailand despite of strict law enforcements and proper education to farmers about its implications on soil, human and animal health The present study determined how residues management practices: residue amendment and stubble burning, influence the soil organic carbon by determining δ13C in paddy soil profile. The 30 cm depth soil samples from the naturally straw amendment and stubble burning paddy fields were collected in Chiang Khwan district, Roi-et province during 2017. The δ13C values with soil depth showed that residue management practices produce statistical differences in both soils. The δ13C values of soil samples from amendment and burning sites ranged from-23.19‰ to-17.98‰ and-24.79‰ to-19.28‰, respectively. Carbon isotopes differentiate clearly between amendment site (more positive values) and burning site (more negative values). The results from this study were in accordance with literatures which reported that the δ13C distribution in the soil profile can be applied to study in SOC dynamics as a result of different paddy residue management practices (amendment or burning). Further research is needed to confirm the validity of the stable carbon isotope technique in this type of studies.

Effects of straw amendment on selenium aging in soils: Mechanism and influential factors

2019 ◽  
Vol 657 ◽  
pp. 871-881 ◽  
Author(s):  
Dan Wang ◽  
Ming-yue Xue ◽  
Ying-kun Wang ◽  
De-zhi Zhou ◽  
Li Tang ◽  
...  
Keyword(s):  
Influential Factors ◽  
Straw Amendment

scholarly journals Contrasting microbial community responses to salinization and straw amendment in a semiarid bare soil and its wheat rhizosphere

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Márton Szoboszlay ◽  
Astrid Näther ◽  
Bei Liu ◽  
Angel Carrillo ◽  
Thelma Castellanos ◽  
...  
Keyword(s):  
Microbial Community ◽  
Bare Soil ◽  
Community Responses ◽  
Wheat Rhizosphere ◽  
Straw Amendment

Nitrogen fixation as influenced by pesticides and rice straw in paddy soils

1987 ◽  
Vol 108 (3) ◽  
pp. 635-638 ◽  
Author(s):  
P. K. Jena ◽  
V. Rajaramamohan Rao
Keyword(s):  
Nitrogen Fixation ◽  
Rice Straw ◽  
Water Regime ◽  
Alluvial Soil ◽  
Paddy Soils ◽  
Combined Application ◽  
Incubation Study ◽  
Straw Amendment ◽  
Straw Application ◽  
Stimulation Of

SummaryThe effect of three herbicides and an insecticide combination on nitrogen fixation in three paddy soils was investigated in a laboratory incubation study. The influence of pesticide combination on N2 fixation was evaluated in the presence and absence of rice straw under flooded and non-flooded conditions. In a non-flooded alluvial soil single or combined application of butachlor and carbofuran significantly stimulated N2 fixation. There was no effect on N2 fixation when thiobencarb was applied alone; but with thiobencarb in combination with carbofuran higher N2 fixation occurred. Both oxadiazone and thiobencarb had no effect on N2 fixation under flooded conditions, but in combination with carbofuran the N2 fixation was high. In acid sulphate saline Pokkali soil, rice straw application stimulated N2 fixation; the stimulatory effect of carbofuran either alone or in combination became more pronounced under flooded conditions. N2 fixation was low in a laterite Sukinda soil and the effect of pesticides was not changed by rice straw amendment. A uniform stimulation of N2 fixation occurred in soils when carbofuran was applied either singly or in combination with other herbicides tested. Results indicate that the effect of pesticides on N2 fixation varied with the rice straw application and water regime.

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