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http://dx.doi.org/10.11625/KJOA.2017.25.2.475

Effects on Application Time of Mixed Expeller Cake fertilizer in Organic Farming Soil and Rice Yield  

Moon, Young-Hun (전라북도농업기술원 기후변화대응과)
Ahn, Byung-Koo (전라북도농업기술원 기후변화대응과)
Lee, Gong-Joon (전라북도농업기술원 기후변화대응과)
Seo, Kyoung-Won (전라북도농업기술원 기후변화대응과)
Ko, Do-Young (전라북도농업기술원 기후변화대응과)
Choi, Seon-Wu (전라북도농업기술원 기후변화대응과)
Kim, Jin-Ho (전라북도농업기술원 기후변화대응과)
Choi, In-Young (전라북도농업기술원 기후변화대응과)
Publication Information
Korean Journal of Organic Agriculture / v.25, no.2, 2017 , pp. 475-487 More about this Journal
Abstract
The aim of this study was to solve the problem of yield loss causing the lag of fertilizer efficiency after tiller stage, being originated by applying mixed expeller cake fertilizer on three day before rice transplanting in organic rice farmers. The mineralization degree of $NH_4-N$ of the mixed expeller cake fertilizer was increased until 7 weeks at flooding condition, and so did $NO_3-N$ until 5 weeks at non-flooding condition. The mineralization rate of nitrogen in paddy soil on 20 days before rice transplanting was the highest by 0.85% on 20 days before the transplanting treatment. The properties of yields during the harvest period have no difference with application time of the mixed expeller cake fertilizer, except soil organic matter. The plan length, culm length and panicle length were the longest on 20 days before rice transplanting. Also, the number of tiller, ripening rat and 1,000 grain weight were the highest on 20 days before rice transplanting, and thereby the yield of white rice were increasing by 9% on 20 days before rice transplanting compared with that of 3 days before rice transplanting. The whiteness values of the rice and amylose content made no difference, but the value of protein and palatability were the same between 20 days and 30 days treatment. In the conclusion, the relationship between rice yield, its quality and application time of the mixed expeller cake fertilizer has showed that the suitable time of applying it reveals 21.3 days before rice transplanting.
Keywords
application time; mixed expeller cake fertilizer; rice; soil;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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