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Effect of Liquid Pig Manure on Yield and Grain Quality of Rice and Barley under Double Cropping Systems in Paddy Field  

Cho Hyeoun-Suk (National Institute of Crop Science, RDA)
Kim Chung-Guk (National Institute of Highland Agriculture, RDA)
Seo Jong-Ho (National Institute of Crop Science, RDA)
Lee Jong-Ki (National Institute of Crop Science, RDA)
Eom Sun-Pyo (National Institute of Crop Science, RDA)
Oh Taek-Keun (Dept, of Agricultural Chemistry, Chungnam National University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.50, no.spc1, 2005 , pp. 99-103 More about this Journal
Abstract
Nitrogen content of liquid manures varies from $3g\;kg^{-1}\;to\;7g\;kg^{-1}$ according to the collecting seasons. The application effects of liquid manure on the yield of rice are the best in LPM+LPM treatment, although the lodging of crops increased and the quality of rice is deteriorated. When application with LPM+CF treatment and CF+LPM treatment showed no difference in rice yield and quality, compared with CE+CF treatment. Therefore, use of liquid manure on farmland should be limited as once per year during cultivation duration and liquid manure is fully fermented during 6 months at least in order to decrease the damage of crops by application of unmatured liquid manure. Also, application amount of liquid manure should be carefully determined by considering the mineral (especially nitrogen) contents of liquid manure and the recommended fertilizer levels for various crops.
Keywords
liquid pig manure; cropping system; lodging index;
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