Analysis of Environmental Properties of Paddy Soils with Regard to Seasonal Variation and Farming Methods

The aim of this study is to investigate the environmental properties of paddy soils depending on farming methods and seasonal variation. The paddy soils in 11 plots of conventional paddy and 24 plots of organic paddy were sampled and analyzed in four season of March, May, August, and October. The obtained data of soil properties were used for statistical analysis. Analysis of variance showed that only NH4-N and P2O5 were significantly different depending on farming methods. However, the differences of all soil properties depending on seasonal variation were strongly significant. Principal component analysis also presented that nitrogen and phosphorus concentration in soils were more significantly influenced by seasonal variation than farming method. Electric conductivity in soil was decreased from March to October. Amounts of soil organic matter in August and October were higher than that in March and May. T-N was decreased from March to October. NH4-N and NO3-N in the soil of both conventional and organic paddy were higher in May than other seasons. T-P concentration was found to be highest in August, but P2O5 concentration was lowest in August. It can be concluded that seasonal variation should be considered for analysis and comparison of soil environmental properties.

[1]  Jingzhu Zhao,et al.  Opportunities and challenges of sustainable agricultural development in China , 2008, Philosophical Transactions of the Royal Society B: Biological Sciences.

[2]  J. Pretty.  Agricultural sustainability: concepts, principles and evidence , 2008, Philosophical Transactions of the Royal Society B: Biological Sciences.

[3]  Min-kyeong Kim,et al.  Assessment of the Heavy Metal Contamination in Paddy Soils Below Part of the Closed Metalliferous Mine , 2015 .

[4]  C. Hong,et al.  Effect of Compost and Tillage on Soil Carbon Sequestration and Stability in Paddy Soil , 2013 .

[5]  C. Manaia,et al.  Comparative study of the microbial diversity of bulk paddy soil of two rice fields subjected to organic and conventional farming , 2011 .

[6]  W. Choi,et al.  Effect of Long-Term Annual Dressing of Organic Matter on Physico-Chemical Properties and Nitrogen Uptake in the Paddy Soil of Fluvio-Marine Deposit , 2010 .

[7]  정덕영,et al.  우리나라 농업의 변천과 비료의 역할 , 2008 .

[8]  Dong-Cheol Seo,et al.  Selection of Optimum Water Plant in Constructed Wetland by Natural Purification Method for Municipal Sewage Treatment , 2006 .

[9]  Young-Son Cho,et al.  An Investigation on the Environmental Factors of Certified Organic and Non-pesticide Paddy Soils Cultivating Rice at Goseong-Gun , 2014 .

[10]  Ahn,et al.  Long-term monitoring of heavy metal contents in paddy soils , 2008 .

[11]  Joo-Hwan Kim,et al.  A Comparison of the Methane Production and the Community Structure for Methanogens in Rice Paddy and Dry Field Farming Soils , 2010 .

[12]  J. Joo,et al.  Assessment of Silicate Fetilizers Application Affecting Soil Properties in Paddy Field , 2011 .

[13]  R. Nemecek,et al.  The level of soil nitrate content at a different management of organic fertilizers application , 2018 .

[14]  Huanxiu Guo,et al.  The environmental efficiency of non-certifed organic farming in China: a case study of paddy rice production , 2014 .

[15]  Jyung Choi,et al.  Effects of Soil Improvement on the Dependence of Rice Nutrient Contents and Grain Quality , 2002 .

[16]  K. Park,et al.  Sulfate Reduction of Rice Paddy, Foreshore, and Reservoir Soil , 2010 .

[17]  Byung-Moo Lee,et al.  Persistence and degradation of herbicide molinate in paddy-soil environment , 2005 .

[18]  Jin-Hong Kim,et al.  Partitioning of Heavy Metals between Rice Plant and Limestone-stabilized Paddy Soil Contaminated with Heavy Metals , 2015 .