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KMID : 0903519820250010030
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1982 Volume.25 No. 1 p.30 ~ p.34
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Efficiency of Soil and Fertilizer Nitrogen in Relation to Rice Variety and Application Time , Using N - 15 Labelled Fertilizer
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Abstract
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In the countrywide NPK simple trials nitrogen content is higher in grain but lower in straw of Tongil than of the local. Potassium content was reverse of nitrogen, Phosphorus content was higher in both parts of Tongil. Phosphorus uptake amount of Tongil was twice of the local. Tongil showed profered uptake of divalent canons (Ca & Mg) than monovalent comparing with the local. Silica uptake ap feared to be lower in Tongil than in the local.
Production efficiency(yield/total nitrogen taken up) translocation efficiency(grain N/total N amount) fertilizer use efficiency, absorbed fertilizer efficiency and fertilization efficiency of nitrogen are higher in Tongil than in the local. Translocation efficiency of Phosphorus was higher in Tongil but that of potassium was tower. SCU greatly decreased silica uptake in the local and increased nitrogen fertilizer use efficiency especially in the local.
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