한국농림기상학회지, 제 3권 제4호(2001) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 3, No. 4, (2001), pp. 177~184
ⓒ Author(s) 2014. CC Attribution 3.0 License.


벼 휴립건답직파 절수재배에 알맞은 질소 수비량

최원영(1), 박홍규(1), 이기상(1), 김상수(1), 이재길(1), 김순철(1), 최선영(2)
(1)호남농업시험장, (2)전북대학교 농과대학

(2001년 09월 13일 수락)

Optimum N Fertilization at Panicle Initiation Stage on
Ridge Direct Seeding on Dry Paddy of Rice as an
Irrigation Water-Saving Cultural System

Weon-Young Choi(1), Hong-Kyu Park(1), Ki-Sang Lee(1), Sang-Su Kim(1), Jae-Kil Lee(1), Soon-Chul Kim(1), Sun-Young Choi(2)
(1)National Hanam Agricultural Experiment Station, RDA, Iksan 570-080, Korea
(2)College of Agriculture, Chonbuk National University, Chonju 561-756, Korea

(Manuscript accepted September 13, 2001)

ABSTRACT
This study was conducted to identify the optimum nitrogen (N) fertilization at panicle initiation stage on ridge direct seeding on dry paddy of rice. During 1999~2000, a series of experiments was carried out at field (Chonbuk series) of the National Honam Agricultural Experiment Station, RDA using Dongjinbyeo. Plants were taller, and leaf area index and top dry weight increased with more N fertilization at panicle initiation stage. Photosynthetic rate of heading stage was higher at higher amounts of N fertilization at panicle initiation stage, especially in 6 kg/10a compared with 10 kg/10a seeding rate. Lodging index and its related traits did not significantly differ under different rates of N fertilization at panicle initiation stage. N uptake of the rice plant increased as more N fertilization at panicle initiation stage. N use efficiency was highest under the standard topdressing rate at 6 kg/10a seeding rate. Panicle number per m$^2$ 수식 이미지 increased with more topdressed N, but ripened grain rate and 1,000-grain weight of brown rice did not differ with an increase in topdressed N. Milled rice yield was 6% higher in the 6 kg/10a seeding rate and 13% higher in the 10 kg/10a seeding rate at 50% more topdressed N compared with 4.8 kg/10a N fertilization at panicle initiation stage of 6 kg/10a seeding rate.

Keyword: rice, water-saving culture, N fertilization at panicle initiation stage, dry paddy direct seeding

MAIN

적요

본 연구는 벼 휴립건답직파 절수재배에 알맞은 질소 수비량을 구명하고자 파종량을 6kg/10a과 10kg/10a으로 하고, 질소 수비 시비량을 10a당 4.8kg(표준구), 2.4kg, 7.2kg 및 9.6kg을 시비 처리하여 시험한 결과를 요약하면 다음과 같다. 가. 질소 수비량이 많을수록 엽면적지수와 지상부 건물중은 약간씩 증가하는 경향이었다. 나. 출수기 광합성능은 질소 수비량이 많을수록 높았으며, 파종량간에는 6 kg/10a 파종에서 높았다. 다. 질소의 흡수량은 질소 수비량이 많을수록 많았으며, 질소 이용율은 6kg/10a 파종에서는 질소 표준수비(4.8kg/10a) 보다 50% 증시에서 가장 높았고 10 kg/10a 파종에서는 별 차이가 없었다. 라. 단위 면적당 수수는 질소 수비량이 많을수록 많았고, 등숙비율과 현미 천립중은 비슷하여, 쌀 수량은 표준(6kg/10a 파종시 수비량 4.8kg/10a 시용) 보다 50%증시(7.2kg/ha)구에서 6kg/10a 파종에서는 6%, 10 kg/10a 파종에서는 13% 증수되었다.

REFERENCES