Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)
- Volume 3 Issue 2
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- Pages.67-76
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- 1983
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- 2287-5824(pISSN)
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- 2287-5832(eISSN)
Effect of Nitrogen Fertilization and Cutting Management on the Carbohydrate Reserves, Regrowth, and Dry Matter Yeild of Sorghum-Sudangrass Hybrid[Sorghum bicolor(L.)Moench] II. Effect of nitrogen fertilization and cutting height on the dead stubble and carbohydrate reserves in stubble of sorghum-sudangrass hybrid
질소시비수준과 예취관리가 수단그라스계 잡종 [Sarghum Bicolor (L.) Moench]의 저장탄수화물함량, 재생 및 수량에 미치는 영향. II. 질소시비수준과 예취높이가 수단그라스계 잡종의 그루터기 고사와 저장탄수화물함량에 미치는 영향
- Seo, Sung (College of Agriculture, Seoul National University) ;
- Kim, Dong-Am (College of Agriculture, Seoul National University)
- Published : 1983.06.30
Abstract
This experiment was carried out to investigate the effects of the different nitrogen rates and cutting heights on the dead stubble after cutting, and the carbohydrate reserved in stubble of sorghum-sudangrass hybrid (Sorghum bicolor (L.) Moench) Pioneer 988. The experiment was undertaken in the Experimental Livestock Farm of Agriculture Coll., Seoul Nat'l Univ. In Suweon, 1981 and 1982. The results obtained are summarized as follows: 1. The dead stubble after cutting was found to be great with high rate of nitrogen fertilizer and low cutting height. It was also learned that the rainfall during forage cutting period made the dead stubble increased. 2. A significant higher (p<0.05) carbohydrate reserves in the stubble was observed in the high stubble height at the first cutting time and 6th through 7th day after the first cutting. The results indicate that the high stubble height reserves more carbohydrate for the early regrwoth stage after the first cutting when comparing with the low stubble. 3. The content of carbohydrate reserves was influenced by climete. Drought is caused to high content of carbohydrate, whereas, rain is caused to low content of that. The critical soluble carbohydrate content causing the death of stubble supposed to be 3 to 6% at least. 4. It is suggest that carbohydrate reserves in plant do not play a distinctive role for the regrowth in a summer annual forage like sorghum-sudangrass hybrid, but it might be rather influenced by the other factors, for example, environmental conditions at harvest and new bud.
본(本) 시험(試驗)은 여름철 청예사초(靑刈飼草)로서 이용(利用)이 급증하고 있는;수단그라스계(系) 잡종(雜種) (수수-수단그라스잡종(雜種);Sorg hum bicolor (L.) Moench)중 우리나라에서 생산성(生産性)과 적응성(適應性)이 가장 우수(優秀)하다고 인정된 Pioneer988을 공시품종(供試品種)으로 하여 질소시비수준(窒素施肥水準)과 예취(刈取)높이가 예취후(刈取后) 그루터기의 고사(枯死)와 저장탄수화물함량(貯藏炭水化物含量)에 미치는 영향을 구명(究明)하기 위하여 1981년(年)과 1982년(年) 2년(年)에 걸쳐 서울대 농대(農大) 부속실험목장내 사초시험포(飼草試驗圃)에서 실시(實施)되었으며 결과(結果)를 요약(要約)하면 다음과 같다. 1. 예취후(刈取后) 그루터기의 고사(枯死)는 질소시비수준(窒素施肥水準)이 높은 구(區)에서, 예취(刈取)높이가 낮은 구(區)에서 증가하였으며, 예취시(刈取時) 비가 올 때도 증가하였다. 2. 그루터기중 저장탄수화물함량(貯藏炭水化物含量)은 1회(回) 예취시(刈取時)와 예취후(刈取后)
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