Saturday, 15 July 2006

Influence on Agricultural Environment by Application of Food Waste Compost.

Kyu Ho So, Jong Sik Lee, Ki Seog Seong, and Myung Chul Seo. National Institute of Agricultural Science and Technology, 249 Seodun-dong Kwonsun-gu, Suwon, 441-707, South Korea

To determine the influence of application of Food Waste Compost (FWC) on agricultural environment safety and stability, FWC was applied in cultivated land planted with rice and Chinese cabbage, respectively. And the effect on crop and soil environment compared with those of farmer's practice. The FWC used in this experiments had high contents of total nitrogen and salinity, which were 1.3% and 1.85%, respectively. Rice was cultivated at clay loam and sandy loam soil. Chemical fertilizer produced higher yield compared to compost treatment, both at clay loam and sandy loam with 20`25% and 17`19%, respectively. The lower yield in sandy loam maybe due to slow immobilization of compost such that the crop did not effectively use it. After the experiment, organic content was higher in soil treated with FWC compared to soil, which was applied with chemical fertilizer. However, the other soil properties were comparable. Also, FWC did not influence on water quality of the surface water and 60cm depth of paddy soil at nine days after transplanting of rice. Nutrient evaluation on paddy soil using lysimeter also had similar result with the experiment, however, yield and chemical composition on the surface water and infiltrated water were higher. The reason was probably that the lysimeter had controlled percolation at the bottom. Chinese cabbage cultivated at sandy clay loam and sandy loam soil. Nutrients in the field with soil textures were evaluated between FWC and chemical fertilizer treatment. Yields of Chinese cabbage decreased with compost treatment at sandy clay loam and sandy loam with 13`15%, 30`-4%, respectively, compared to those of chemical fertilizer. After the experiment, Na content in sandy soil increased to 0.59 cmol kg-1 with FWC application. As the results, application of FWC in the rice paddy soil had not affected water and soil environment but it reduced the yields. However, salinity was accumulated in the soil with FWC treatment. Further study should be conducted on the effect of compost application on safety and stability of agricultural environment.

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