Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Effect of Different Fertilizer Levels, Split Application Rate, and Seeding Methods on Dry Matter Yield and Forage Quality of Italian ryegrass in Early Spring on Paddy Field

이탈리안 라이그라스의 논 춘파재배시 시비수준, 분시비율, 파종방법이 생산성 및 사료가치에 미치는 영향

  • Kim, Young-Jin (Grassland & Forages Division, National Institute of Animal Science, RDA) ;
  • Jung, Jeong-Sung (Grassland & Forages Division, National Institute of Animal Science, RDA) ;
  • Choi, Ki-Choon (Grassland & Forages Division, National Institute of Animal Science, RDA)
  • 김영진 (농촌진흥청 국립축산과학원 초지사료과) ;
  • 정종성 (농촌진흥청 국립축산과학원 초지사료과) ;
  • 최기춘 (농촌진흥청 국립축산과학원 초지사료과)
  • Received : 2016.05.31
  • Accepted : 2016.09.06
  • Published : 2016.12.31
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Abstract

This study was carried out to determine the effects of application levels of fertilizer and sowing methods on yields and nutritive values of Italian ryegrass (IRG) in early spring. Five fertilizer levels were used: Treatment 1, 100-80-80 kg/ha; Treatment 2, 120-100-100 kg/ha; Treatment 3, 140-120-120 kg/ha; Treatment 4, 160-140-140 kg/ha; Treatment 5, 140-120-120 kg/ha of $N-P_2O_5-K_2O$ with silicate fertilizer 200 kg/ha. Dry matter (DM) yield was 8,330 kg/ha in Treatment 5, 7,686 kg/ha in Treatment 4, and 7,347 kg/ha in Treatment 3. There was no significant difference in total digestible nutrients (TDN) content. The content of crude protein was the highest in Treatment 5. Dry matter ratio was the lowest in Treatment 5. In Treatment 3, DM yield was 7,347 kg/ha, when total amounts of fertilizers were applied at one time. However, DM yield was 7,405 kg/ha, when 50% of pre-planting fertilizer and 50% of supplementary fertilizer were applied at different time. There was no significant difference between total application and split application of fertilizers. However, DM yield was 9,469 kg/ha in application treatment with 100 kg/ha of additional urea at three to four leaf stages of IRG. Regarding DM yield by sowing methods of IRG, the following order was found: drill seeding (8,176 kg/ha) > rotary-broadcast seeding-stamping (7,957 kg/ha) > rotary-broadcast seeding (7,810 kg/ha) > broadcast seeding (7,347 kg/ha) > broadcast seeding-rotary (7,034 kg/ha). DM yield (59.57%) was the lowest in broadcast seeding-rotary. Crude protein content was the highest with rotary work but the lowest with broadcast seeding.

본 연구는 중남부지역 논에서 이탈리안 라이그라스의 춘파재배시 시비수준, 파종방법별 생산성 및 사료가치 비교를 통해 최적 춘파재배법을 구명하고자 수행되었다. 시비수준간 건물수량을 살펴보면 $N-P_2O_5-K_2O$ = 140-120-120+규산질비료(Silicate fertilizer) 200 kg/ha 처리에서 8,330 kg/ha으로 가장 높았으며, 160-140-140 kg/ha 처리에서도 7,686 kg/ha으로서 표준시비량 (140-120-120 kg/ha) 처리(7,347 kg/ha)에서 보다 높았다. Total digestible nutrient (TDN) 함량은 처리간 유의성이 없었다. 조단백질 함량은 규산질 비료를 추가한 처리에서 11.62%로 가장 높았으나 건물률은 17.6%로 가장 낮았다. 춘파시 표준시비량을 기비로 전량시용 (100:0) 했을 때의 건물수량은 7,347 kg/ha으로서 기비:추비 (50:50)로 시용했을 때의 7,405 kg/ha와 유의적인 차이를 나타내지 않았다. 그러나 표준시비량을 전량 기비로 주고 3~4엽기에 요소 100 kg/ha를 추가 시용했을 때는 표준시비량만을 기비시용 했을 때에 비해 건물수량이 9,469 kg/ha으로 29%나 증가하였다. 파종방법별 건물수량은 조파(8,176 kg/ha) > 로터리-산파-답압 (7,947 kg/ha) > 로터리-산파 (7,810 kg/ha) > 산파 (7,347 kg/ha) > 산파-로터리 (7,034 kg/ha) 순으로 많았으며, TDN 함량은 산파(61.72%)와 로터리-산파(61.67%) 처리에서 높은 수치를 나타냈고 산파-로터리(59.57%) 처리에서 가장 낮았다. 조단백질 함량은 로터리 작업을 수행한 처리에서 높았으며 산파에서 가장 낮은 수치를 나타냈다.

Keywords

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