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제주지역에서 질소분시에 따른 귀리의 생육특성 , 사초수량 및 조성분 변화
조남기,조영일,송창길,송승운,오은경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.4
This study was conducted at a volcanic ash soil of Jeju island from 1997 to 1998 to determine the optimum frequency of split N application for forage production of oats. Nitrogen fertilizer was applied with 240㎏ N/ha, and frequencies of the split applications were 1, 2, 3, 4 and 5 times. Days to heading increased from 160 to 163 days as N was split-applied from one to five applications. Plant height was greatest(195.7㎝), followed by nitrogen application of at five applications. Generally plant height was shortest as the number of splitting nitrogen application treatments was decreased. This pattern held for leaf length, leaf width, and culm length which were greatest in four and five applications respectively, but no. of grains per panicle and No. of spikelet per panicle which were increased in three applications with 54.0 and 22.2 respectively. Fresh forage yield increased from 36.63 to 51.70MT/ha, dry matter(DM) yield from 6.47 to 8.43MT/ha, crude protein(CP) yield from 0.75 to 1.20MT/ha, total digestible nutrients(TDN) yield from 3.22 to 4.65MT/ha as N was split-applied from one to four applications, and then decreased to 51.07, 7.63, 1.12 and 4.48MT/ha respectively, in five split applications. Grain yield increased from 4.70 to 5.67MT/ha as N was split-applied from one to three applications and then decreased to 5.07MT/ha in five applications. This pattern held for test weight and 1,000 grains weight which were heaviest in three applications with 366.5 and 37.8g, respectively. Nitrogen uptake increased from 120 to 191.2㎏/ha as N was split-applied from one to four applications, and then decreased to 178.7㎏/ha in five split applications. Nitrogen use efficiency decreased from 53.9 to 42.7 ㎏ DM/kg N with increasing split N applications. Crude protein content increased from 11.6 to 14.6%, ether extract content from 2.3 to 4.0%, nitrogen free extract content from 39.7 to 41.6%, and TDN content from 49.8 to 57.4%, but crude ash content decreased from 8.7 to 6.1% and crude fiber from 31.6 to 27.4% as N was split-applied from one to five applications. These results indicate that the optimum frequency of split N applications is oats in volcanic ash soils of Jeju island.
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제주지역에서 파종량 차이에 따른 귀리의 생육특성 , 사초수량 및 조성분 변화
조남기,조영일,송창길,송승운,오은경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.4
Oats was grown at five seeding rates(90, 110, 130, 150 and 170㎏/㏊) from Nov. 8, 1998 to June 8, 1999 at Jeju island to determine influence of seeding rate on agronomic characters and forage yield and quality. Days to heading and days to maturing increased 164-166 and 206-208 days as seeding rate increased from 90 to 170㎏/㏊. The plant height increased from 118.5 to 122.6㎝ as seeding rate was increased from 90 to 150㎏/㏊ and then decreased to 122.1㎝ at a rate of 170㎏/㏊. This pattern held for leaf length, leaf width and culm length which were greatest in four seeding rate respectively, but no. of grains per panicle and no. of spikelet per panicle which were decreased as seeding rate increased from 90 to 170㎏/㏊. As seeding rate increased from 90 to 150㎏/㏊, fresh forage, dry matter, crude protein and total digestible nutrients(TDN) yield increased from 29 to 43.43, 4.77 to 8.27, 0.55 to 1.10 and 2.33 to 4.39MT/㏊, respectively, and then decreased with further increased seeding rates. Grain yield was increased from 1.33 to 6.10MT/㏊ as seeding rate was increased from 90 to 130㎏/㏊ and then decreased from 5.50 to 4.50MT/ha at the 150 and 170㎏/㏊ seeding rates. Test weight and 1,000 grains weight decreased as seeding rate was increased. Crude protein, ether extract, nitrogen free extract and TDN content increased 11.5 to 13.8%, 2.0 to 3.1%, 37.6 to 39.2%, 48.8 to 54.2% respectively, but crude fiber content decreased 35.1 to 32.2% and crude ash declined 8.5 to 6.5% as seeding rate increased from 90 to 170㎏/㏊. The optimum seeding rate to obtain the highest TDN yield was estimated to be 167.5㎏/㏊.
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