Effect of Incorporation Times of Green Barley and Hairy Vetch on Rice Yield in Paddy Soil with Liquid Pig Manure
2013
Kang, S.W., Sunchon National University, suncheon, Republic of Korea | Seo, D.C., Sunchon National University, suncheon, Republic of Korea | Lee, S.G., Sunchon National University, suncheon, Republic of Korea | Seo, Y.J., Sunchon National University, suncheon, Republic of Korea | Park, J.W., Sunchon National University, suncheon, Republic of Korea | Ryu, J.H., RDA, Suwon, Republic of Korea | Kim, M.T., RDA, Suwon, Republic of Korea | Kang, H.W., RDA, Suwon, Republic of Korea | Heo, J.S., Gyeongsang National University, Republic of Korea | Cho, J.S., Sunchon National University, suncheon, Republic of Korea
BACKGROUND: Soil incorporation of green manure crop(GMC) and liquid pig manure(LPM) is one of the methods for reduction of chemical fertilizer and the increase of crop yield. The objective of this study was to select optimal incorporation time of GMCs on growth and nutrient property in paddy soil treated LPM. METHODS AND RESULTS: The kinds of GMCs were Hordeum vulgare L.(green barley, GB) and Vicia villosa roth(hairy vetch, HV). The effects of GMCs on rice yield were investigated under different incorporation times of GMCs(LPM1: at 25 days before rice transplantation, LPM2: at 18 days before rice transplantation, LPM3: at 11 days before rice transplantation). In GB treatments, the biomass was greater in the order of LPM3 ≧ LPM2 ≧ LPM1. Contents of N, P and K ranged 1.21∼1.28, 0.36∼0.38 and 1.41∼1.45%, respectively, regardless of incorporation times. The amounts of nutrient supply in GB treatments were higher in LPM1 than those in other treatment conditions. In GB treatments, rice yields in LPM1, LPM2 and LPM3 were 523, 525 and 526(increasing yield 3% than control) kg/10a, respectively. In HV treatments, the amounts of nutrient supply were higher in the order of LPM3 ≧ LPM2 ≧ LPM1. Rice yields were 530 kg/10a for LPM1, 531 kg/10a for LPM2, 535 (increasing yield 5% than control) kg/10a for LPM3 in HV treatments, respectively. CONCLUSION(s): The optimum incorporation time of green barley and hairy vetch was at 11 days before rice transplantation(LPM3) in paddy soil with liquid pig manure.
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