scholarly journals Postdispersal Weed Seed Predation by Crickets in a Rice Paddy Field after Irrigation Water Recedes

2014 ◽  
Vol 48 (1) ◽  
pp. 63-69 ◽  
Author(s):  
Minoru ICHIHARA ◽  
Hidehiro INAGAKI ◽  
Kazuo MATSUNO ◽  
Chieko SAIKI ◽  
Shunsuke MIZUMOTO ◽  
...  
Keyword(s):  
Seed Predation ◽  
Irrigation Water ◽  
Paddy Field ◽  
Rice Paddy ◽  
Weed Seed ◽  
Rice Paddy Field

Spatial-uniform application method of methane fermentation digested slurry with irrigation water in the rice paddy field

2013 ◽  
Vol 12 (3) ◽  
pp. 335-342 ◽  
Author(s):  
Kozue Yuge ◽  
Hiroki Maeda ◽  
Munehiro Tanaka ◽  
Mitsumasa Anan ◽  
Yoshiyuki Shinogi
Keyword(s):  
Irrigation Water ◽  
Paddy Field ◽  
Rice Paddy ◽  
Methane Fermentation ◽  
Rice Paddy Field ◽  
Application Method

Evaluation of the spatial distribution of digested slurry supplied with irrigation water to an irregularly shaped rice paddy field

2014 ◽  
Vol 8 ◽  
pp. 6421-6431
Author(s):  
Kosuke Hamada ◽  
Kozue Yuge ◽  
Munehiro Tanaka ◽  
Mitsumasa Anan ◽  
Yoshiyuki Shinogi
Keyword(s):  
Spatial Distribution ◽  
Irrigation Water ◽  
Paddy Field ◽  
Rice Paddy ◽  
Rice Paddy Field

Natural cadmium loading and balance in a non-polluted rice paddy field in Japan

2008 ◽  
Vol 58 (11) ◽  
pp. 2243-2249 ◽  
Author(s):  
Saeko Yada ◽  
Tomohito Arao ◽  
Akira Kawasaki ◽  
Takayuki Saito ◽  
Hideyuki Nagai ◽  
...  
Keyword(s):  
Water Treatment ◽  
Irrigation Water ◽  
Paddy Field ◽  
Rice Paddy ◽  
Phosphorus Fertilizer ◽  
Cultivated Rice ◽  
Rice Culture ◽  
Rice Paddy Field ◽  
Actual Increase ◽  
Total Input

We determined the natural Cd balance in a cultivated rice paddy field in Japan. The main sources of Cd in the non-polluted paddy field were phosphorus fertilizer and precipitation (annual input of Cd, 2,000 mg ha−1 and 1,020 mg ha−1, respectively). These sources account for 95% of the total input of Cd (3,192 mg ha−1). The actual increase of Cd in the soil was 0.0016 mg kg−1, we thus consider Cd in soil increases only slightly as a result of rice culture. This study indicates that it is difficult to reduce Cd loading by irrigation water treatment in a non-polluted paddy field. This further indicates that once a field is polluted by Cd it is difficult to decrease the accumulated Cd by the ordinary cultivation of rice plants.

Functional soil organic matter fractions in response to long-term fertilizer management in a double-cropping paddy field of southern China

2021 ◽  
pp. 1-9
Author(s):  
Haiming Tang ◽  
Chao Li ◽  
Lihong Shi ◽  
Li Wen ◽  
Kaikai Cheng ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Paddy Field ◽  
Southern China ◽  
Rice Paddy ◽  
Chemical Fertilizer ◽  
Protection Mechanism ◽  
Rice Paddy Field ◽  
Double Cropping

Abstract Soil organic matter (SOM) and its fractions play an important role in maintaining or improving soil quality and soil fertility. Therefore, the effects of a 34-year long-term fertilizer regime on six functional SOM fractions under a double-cropping rice paddy field of southern China were studied in the current paper. The field experiment included four different fertilizer treatments: chemical fertilizer alone (MF), rice straw residue and chemical fertilizer (RF), 30% organic manure and 70% chemical fertilizer (OM) and without fertilizer input as control (CK). The results showed that coarse unprotected particulate organic matter (cPOM), biochemically, physically–biochemically and chemically protected silt-sized fractions (NH-dSilt, NH-μSilt and H-dSilt) were the main carbon (C) storage fractions under long-term fertilization conditions, accounting for 16.7–26.5, 31.1–35.6, 16.2–17.3 and 7.5–8.2% of the total soil organic carbon (SOC) content in paddy soil, respectively. Compared with control, OM treatment increased the SOC content in the cPOM, fine unprotected POM fraction, pure physically protected fraction and physico-chemically protected fractions by 58.9, 106.7, 117.6 and 28.3%, respectively. The largest proportion of SOC to total SOC in the different fractions was biochemically protected, followed by chemically and unprotected, and physically protected were the smallest. These results suggested that a physical protection mechanism plays an important role in stabilizing C of paddy soil. In summary, the results showed that higher functional SOM fractions and physical protection mechanism play an important role in SOM cycling in terms of C sequestration under the double-cropping rice paddy field.

Emission, Production, and Oxidation of Methane in a Japanese Rice Paddy Field

2018 ◽  
pp. 231-244 ◽  
Author(s):  
Kazuyuki Yagi ◽  
Katsumi Kumagai ◽  
Haruo Tsuruta ◽  
Katsuyuki Minami
Keyword(s):  
Paddy Field ◽  
Rice Paddy ◽  
Rice Paddy Field ◽  
Oxidation Of Methane

Benthic macroinvertebrate biodiversity improved with irrigation ponds linked to a rice paddy field

2016 ◽  
Vol 46 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Lak Jung Choe ◽  
Kwang Jin Cho ◽  
Min Su Han ◽  
Min Kyeong Kim ◽  
Soon Kun Choi ◽  
...  
Keyword(s):  
Paddy Field ◽  
Rice Paddy ◽  
Benthic Macroinvertebrate ◽  
Rice Paddy Field

Methylogaea oryzae gen. nov., sp. nov., a mesophilic methanotroph isolated from a rice paddy field

2011 ◽  
Vol 61 (11) ◽  
pp. 2568-2572 ◽  
Author(s):  
Estefanía Geymonat ◽  
Lucía Ferrando ◽  
Silvana E. Tarlera
Keyword(s):  
Paddy Field ◽  
Sequence Similarity ◽  
Rice Paddy ◽  
Cellular Fatty Acid ◽  
Comparative Sequence Analysis ◽  
Rrna Gene ◽  
Type I ◽  
Methylococcus Capsulatus ◽  
Rice Paddy Field ◽  
Moderately Thermophilic

A novel methanotroph, designated strain E10T, was isolated from a rice paddy field in Uruguay. Strain E10T grew on methane and methanol as sole carbon and energy sources. Cells were Gram-negative, non-motile, non-pigmented, slightly curved rods showing type I intracytoplasmic membranes arranged in stacks. The strain was neutrophilic and mesophilic; optimum growth occurred at 30–35 °C with no growth above 37 °C. The strain possessed only a particulate methane monooxygenase (pmoA). Phylogenetic analysis based on 16S rRNA gene sequences indicated that the strain was most closely related to the moderately thermophilic strains Methylocaldum szegediense OR2T (91.6 % sequence similarity) and Methylococcus capsulatus Bath (91.5 %). Comparative sequence analysis of pmoA genes also confirmed that strain E10T formed a new lineage among the genera Methylocaldum and Methylococcus with 89 and 84 % derived amino acid sequence identity to Methylococcus capsulatus Bath and Methylocaldum gracile VKM-14LT, respectively. The DNA G+C content was 63.1 mol% and the major cellular fatty acid was C16 : 0 (62.05 %). Thus, strain E10T ( = JCM 16910T  = DSM 23452T) represents the type strain of a novel species within a new genus, for which the name Methylogaea oryzae gen. nov., sp. nov. is proposed.

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