|
KMID : 0613820140240040403
|
|
Journal of Life Science
2014 Volume.24 No. 4 p.403 ~ p.410
|
|
|
An Investigation on the Environmental Factors of Certified Organic and Non-pesticide Paddy Soils Cultivating Rice at Goseong-Gun
|
|
Joo Heui-Sig
Cho Young-Son
Chun Hyun-Sik
|
|
|
Abstract
|
|
|
This study was conducted in organic certification soil for the comparison of heavy metals, nutrients, and irrigated water standards to certify a farm. It was carried out in 811 paddy fields of organic rice (Oryza sativa L.) cultivated at Goseong-Gun. The amounts of 8 heavy metals, Cd, Cu, As, Hg, Pb, Cr6+, Zn, and Ni were found to be 0.05, 14.5, 1.08, 0.92, 10.7, 1.34, 35.9, and 22.2 mg kg-1 in regular sequence in the organic paddy soil, and they were 0.32, 13.6, 1.01, 0.03, 10.4, 0.91, 42.4 and 22.5 mg kg-1 in the non-pesticide paddy soil. In comparing organic and non-pesticide paddy soil with respect to the chemical characteristics of the soil, the average pH and the amount of organic matter, available phosphate and available silicate were 5.88 and 27.6 g kg-1, 134.5 mg kg-1, and 165.3 mg kg-1, while they were 5.78 and 32.1 g kg-1, 107.7 mg kg-1, and 175.2 mg kg-1, respectively. The amount of exchangeable cation K+, Ca2+, and Mn2+ were 0.25, 5.20, and 1.04 cmol+ kg-1 in organic paddy soil, while they were 0.38, 5.13, and 1.19 cmol+ kg-1 in non-pesticide paddy soil. The pH, DO, BOD, COD and SS conditions of the irrigated water used in the organic paddy soil were found to be 7.23, 8.40, 2.80, 1.86, and 2.58mg l-1 and the condition of irrigated water used in the non-pesticide paddy soil were found to be
7.65, 9.16, 2.25, 4.11, and 4.00 mg l-1, respectively. Based on these findings, we suggest that environmentally-friendly
certificates in Korea have to unify organic and non-pesticide agro-products in an organic standard in food policy and control because there is no difference between soil and irrigated water standards in the two certifications.
|
|
|
KEYWORD
|
|
|
Heavy metals, irrigated water, organic products, soil chemical characteristics
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|