벼짚의 사료가치(飼料價値) 향상(向上)을 위(爲)한 질소추비(窒素追肥)

Nitrogen Top Dressing for Improving Feed Value of Rice Straw

  • 김영섭 (농촌진흥청 농업기술연구소) ;
  • 박훈 (농촌진흥청 농업기술연구소) ;
  • 박영선 (농촌진흥청 농업기술연구소)
  • Kim, Yung Sup (Institute of Agricultural Sciences, Office of Rural Development) ;
  • Park, Hoon (Institute of Agricultural Sciences, Office of Rural Development) ;
  • Park, Young Sun (Institute of Agricultural Sciences, Office of Rural Development)
  • 심사 : 1973.05.30
  • 발행 : 1973.09.20

초록

수량저하(收量低下)를 가져오지 않고 벼짚의 단백질함량(蛋白質含量)을 증가(增加)시키는 질소추비(窒素追肥) 시험(試驗)을 IR667(수원(水原) 214)과 진흥(振興)을 사용(使用), 포장(圃場)에서 행(行)하고 벼짚의 사료가치(飼料價値)를 일반분석(一般分析)에 의(依)하여 비교검토(比較檢討)하였다. 1. 진흥(振興)보다 IR667은 조단백(粗蛋白), 조(粗)섬유 회분함량(灰分含量)이 높고 전탄수화물(全炭水化物)은 낮았으며 조지방(粗脂肪)은 큰 차이(差異)가 없었다. 2. 후기추비(後期追肥)로 질소시비량(窒素施肥量)이 증가(增加)할수록 조단백질(粗蛋白質)과 전탄수화물(全炭水化物)이 증가(增加)하나 조(粗)섬유 조지방(粗脂肪) 및 회분(灰分)은 감소(減少)하며 이러한 현상(現狀)은 IR667에서 뚜렷하였다. 3. 벼짚중 인산(燐酸) 함량(含量)은 질소시비량(窒素施肥量)의 증가(增加)에 따라 감소(減少)하는데 진흥(振興)에서 뚜렷하였다. 4. 질소시비량(窒素施肥量) 증가(增加)에 따라 현미중(玄米中) 단백질함량(蛋白質含量)이 크게 증가(增加)하며 Ca는 감소(減少)하는 경향(傾向)이었다. 5. 벼짚중 조단백질함량(粗蛋白質含量)의 전국평균치(全國平均値)는 4.06%로 혼합산야초(混合山野草)의 그것 (6.71%)보다 훨씬 낮으나 질소시비법(窒素施肥法) 개선(改善)으로 수량(收量)을 증가(增加)시키는 동시(同時) 산야초(山野草)를 증가(增加)시킬 수 있을 것으로 보였다.

For the increase of protein content in the straw without detrimental effect on grain yield by top dressing with various nitrogen amount IR667 (Suwon 214) and Jinheung were grown under field condition and the value as feed was investigated by chemical analysis on the harvested straw. 1. In straw IR667 was higher in crude protein, crude fiber and ash, and lower in total carbohydrate than Jinheung, and crude fat content was not much different. 2. The contents of crude protein and total carbohydrate increased with nitrogen level but crude fiber, crude fat and ash decreased, and those phenomena were clear in IR667. 3. The content of phosphorus in straw decreased with increasing nitrogen level more clearly in Jinheung. 4. Protein content was greatly increased in brown rice and calcium content tended to decrease with the increase of nitrogen application amount. 5. Country mean of crude protein in straw was 4.06% much lower than that of mixed wild grasses and forages (6.71) but crude protein could be increased above that of wild sources, moreover with grain yield increase by the improvement of nitrogen fertilizer application.

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