Yield Variation in Different Harvest Time of Coix lachryma L. var. Ma-yuen STAPF

율무의 기계수확(機械收穫) 시기(時期)에 따른 수량성(收量性)

In order to study on suitable harvest time of adlay utilizing self-feeding combine harvester with four rows, which is originally designed for rice harvest, harvesting were carried out at four different times (40, 50, 60 and 70 days after anthesis) . For efficient operation, appropriate working rows were 2 rows at 50 days after anthesis and working speed was 0.26m/sec at 60 days after anthesis. Theoretical working capability was 11.23a/hr at 60 days after anthesis. As the harvesting was delayed, water content of adlay decreased. Water content of culm+leaf was $69.7{\sim}55.3%$ and water content of grain was 34.2% at 60 days after anthesis. The later adlay was harvested. the higher the percent of ripened grain was. But the immature grain was decreased. Remnants was less than 1.8% at 60 days after anthesis. The later adlay was harvested, the heavier volume weight was. Yield was the highest at 60 days after anthesis. When utilizing self-feeding combine harvester with four rows, which was originally designed for rice harvest, suitable harvesting time was 60 days after anthesis. Therefore, theoretically suitable harvest time was 68 days after anthesis.

농가(農家)에 보급(普及)된 수도용(水稻用) 콤바인의 이용효율(利用效率)을 높이고 농가소득 증대(農家所得 增大)에 기여(寄與)하기 위해 율무의 콤바인 수확적기(收穫適期)를 구명(究明)하고자 수확시기(收穫時期)를 개화기후(開花期後) 40일, 50일, 00일, 70일에 실시(實施)하시여 얻은 결과(結果)를 요약(要約)하면 다음과 같다. 1. 작업효율(作業效率)은 개화기후(開花期後) 50일 이후(以後)에는 2조 수확(收穫)) 가능(可能)하였고, 작업속도(作業速度)는 개화기후(開花期後) 50일 이후(以後)에는 0.26m/s였고 이론상의 작업능력(作業能力)은 개화기후(開花期後) 60日 이후(以後)는 11.23a/hr였다. 2. 수분함량(水分含量)은 수확시기(收穫時期)가 늦어질수록 낮아져 경엽(莖葉)의 수분함량(水分含量)은 $69.7{\sim}55.3%$ 였고, 종실(種實)의 수분함량은 개화기후(開花期後) 60일 이후(以後)에는 34.2%정도로 안정 되었다. 3. 수확시기(收穫時期)가 늦어질수록 등숙립(登熟粒)은 증가(增加)하였고, 미숙립(未熟粒)과 검불은 감소(減少)하였는데, 개화기후(開花期後) 60일 이후(以後)에는 검불의 혼입율이 1.8%미만이었다. 4. 개화기후 40일부터 70일까지 10일 간격으로 조사한 결과, l 중은 수확시기(收穫時期) 가 늦어질수록 무거워졌으나, 10a당(當) 종실수량(種實收量)은 개화기후(開花期後) 60일에서 가장 무거웠다. 5. 율무의 수도용(水稻用) 콤바인을 이용한 수확적기(收穫適期)는 회귀분석(回歸分析) 결과(結果) 개화기후(開花期後) 68 일경(日頃)이었다.