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Korean journal of crop science = 韓國作物學會誌 v.50 no.1, 2005년, pp.16 - 21   피인용횟수: 1

Improvement of Nitrogen Efficiency by N Application at Early Tillering Stage in Direct-Seeded Rice

Seo Jun-Han    (Department of Agronomy, Seoul National University   ); Lee Ho-Jin    (Department of Agronomy, Seoul National University   ); Lee Seung-Hun    (Department of Agronomy, Seoul National University  );
  • 초록

    This study was conducted to establish the elaborate nitrogen fertilization method to enhance N use efficiency in direct-seeded rice on flooded paddy. The nitrogen uptake by rice plants was insignificant until 25 days after seeding, and increased gradually thereafter. During this early growth stage, rice plants absorbed only the $4\%$ of basal applied N, while the $45\%$ of N fertilizer remained in the paddy soil. The absorption of basal N by rice plants was almost completed at 46 days after application. Nitrogen top-dressed at 5-leaf stage was well matched to crop nutrient demand, so it could be absorbed so actively in 8days after application. As a result, we could cut down the amount of N fertilizer to $36\%$ of the basal N level without significant difference in yield. Plant recoveries of fertilizer $^{15}N$ applied with different application timings were $7.8\%$ for basal, $9.4\%$ for 5-leaf stage, $17.1\%$ for tillering stage, and $23.4\%$ for panicle initiation stage, respectively. When urea was applied with nitrogen fertilization practice based on basal incorporation (BN), plant recovery of $^{15}N$ at harvest was $31.0\%$ , which was originated from $13.7\%$ for grain, and $21.3\%$ of the fertilizer $^{15}N$ remained in the soil, and the rest could be uncounted. Plant recovery of fertilizer $^{15}N$ applied with nitrogen fertilization practice based on topdressing at 5-leaf stage (TN), where N rate was reduced by $18\%$ compared with BN, was $35.1\%$ (grain $15.6\%$ ), and $19.9\%$ of the fertilizer $^{15}N$ remained in the soil, and the rest could be uncounted. TN showed a higher $^{15}N$ recovery than BN because it was to apply N fertilizer at a time to well meet the demand of rice plant direct-seeded on flooded paddy. We concluded that TN would be the nitrogen fertilization method to enhance N use efficiency in direct-seeded rice on flooded paddy.


  • 주제어

    rice .   nitrogen fertilization method .   N use efficiency .   N uptake .   plant recovery of.  

  • 참고문헌 (9)

    1. Ando, H, S Shoji, and K. Aizawa. 1985 The fate of topdressed nitrogen at panicle formation stage in paddy field. Jpn. J Soil Sci.& Plant Nutr 56 . 53-55 
    2. Escabarte Jr, R. S, H Ando, and Ken-Ichi Kakuda. 1999. Comparison of growth and 15nitrogen recovery between direct seeded flooded and transplanted rice at early growth stage under conventional and delayed planting. Soil Sci. Plant Nutr. 45(1) 131-142 
    3. Freney, F. R, AC F. Trevitt, S. K. De Datta, W. N Obcemea, and J. G. Real. 1990 The interdependence of ammonia volatilization and denitrification as nitrogen loss processes in flooded rice fields in the Philippines. Biol. FertiI. SoiIs 9 . 31-36 
    4. Peng, S., F V Garcia, R.C. Laza, A. L. Sanico, R. M. Visperas, and K.G. Cassman. 1996 Increased N-use efficiency using a chlorophyII meter on high-yielding irrigated rice. Field Crops Research 47 . 243-252 
    5. Shoji, S. and T. Mae. 1984. Dynamics of inorganic nutrients and water, In ecophysiology of agricultural plants III. pp. 97-220. Buneido, Tokyo 
    6. Vlek, P.L. G. and B H Byrnes 1986 The efficacy and loss of fertilizler N in lowland rice. Fertilizer Res. 9 131-147 
    7. De Datta, S. K. and R.J. Buresh. 1989. Integrated nitrogen management in irrigated rice. Adv. Soil Sci. 10 143-169 
    8. Reddy, K. R. and W H. Jr. Patrick.1976. Yield and nitrogen utilization by rice as affected by method and time of application of labelled nitrogen. Agronomy J. 68 . 965-969 
    9. Tanaka, N and A Yoshida 1983. Tohoku Agri Res. 33 53-54 
  • 이 논문을 인용한 문헌 (1)

    1. 2006. "" Korean journal of crop science = 韓國作物學會誌, 51(1): 32~40     

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    1. 1979 "연맥 등숙기 동안 $^14$C물질의 전유와 절엽 및 제영이 종실중에 미치는 영향" 韓國作物學會誌 = Journal of Korean Society of Crop Science 24 (4): 38~44    
    2. 1981 "맥류의 기공확산저항의 일중변화와 입위별 기공의 분포" 韓國作物學會誌 = Journal of Korean Society of Crop Science 26 (1): 45~50    
    3. 1981 "근류균의 종자 접종방안의 차이가 근류형성 및 Alfalfa 유묘의 생장에 미치는 영향" 韓國作物學會誌 = Journal of Korean Society of Crop Science 26 (2): 192~197    
    4. 1981 "산성토양에서의 근류균 종자접종과 석회시용이 Alfalfa (Medicago sativa L. cv. Luna)의 초기생장에 미치는 영향" 韓國作物學會誌 = Journal of Korean Society of Crop Science 26 (2): 198~206    
    5. 1981 "질소기비에 대한 Orchardgrass의 생육 및 수량반응과 질소이용성" 韓國作物學會誌 = Journal of Korean Society of Crop Science 26 (3): 257~262    
    6. 1982 "질소시비에 대한 Sudangrass의 생육 및 수량반응과 질소이용성" 韓國作物學會誌 = Journal of Korean Society of Crop Science 27 (1): 66~71    
    7. 1983 "목초 단, 혼파군락에서의 초형구조와 광이용성 및 건물수량생산성" 韓國作物學會誌 = Journal of Korean Society of Crop Science 28 (2): 272~279    
    8. 1983 "파종기와 예취관리가 돼지감자 생육 및 수량에 미치는 영향" 한국초지학회지 = Journal of the Korean Society of Grassland Science 4 (2): 147~151    
    9. 1985 "파종기 이동에 따른 Silage 옥수수의 생장해석" 한국초지학회지 = Journal of the Korean Society of Grassland Science 5 (3): 212~219    
    10. 1985 "옥수수 초형교정이 군락 투광성 및 수량성에 미치는 영향" 韓國作物學會誌 = Journal of Korean Society of Crop Science 30 (1): 76~83    

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