시설재배 잎들깨의 생육시기에 따른 엽 중 무기성분 함량

This experiment was conducted to clear up the cause of nutrient physiological disorder and to manage of optimum fertilization for leaf perilla crop under plastic film house condition in Geum-san area in 2009. A nutrient contents of leaf perilla were analyzed during the growing stages of crop from the first harvest to the last harvest stages, and the data were going to use as the nutritional factors for farms' activity in the fields. In survey of leaf perilla growing status at five farmers' fields, it was needed 30 days for growing of 5~10 stems, 60 days for 10~15 stems and 45 days for 15~20 stems of leaf perilla. Contents of nitrogen, phosphorus and potassium in leaf and stem had been kept on some high values in early stages, but it had been decreased in gradually in late stages of growing. Nitrogen and potassium contents were more changeable in leaf than stem, and phosphorus content was kept in more both of leaf and stem than those of nitrogen and potassium. The major macro-nutrient contents of perilla leaf on first of July were 6.34 in N, 0.54 in P, 2.48 in K, 1.98 in Ca and 0.62% in Mg, total uptake amounts of major three elements were $400kg\;ha^{-1}$ in N, $30kg\;ha^{-1}$ in P and $250kg\;ha^{-1}$ in K. Total yield of perilla leaf was $52,000kg\;ha^{-1}$, and total dry matter was $10,510kg\;ha^{-1}$ with $8,680kg\;ha^{-1}$ in leaf dry matter and $1,830kg\;ha^{-1}$ in stem dry matter. 금산 지역에서 잎들깨가 성장하는데 5~10마디까지는 30일 정도, 11~15마디까지는 60일 정도, 16~20마디까지는 45일 정도씩 소요되는 것으로 조사되었다. 생육시기별 잎들깨 잎과 줄기의 질소, 인산 및 칼리함량은 생육초기에는 비교적 높은 함량을 보이다가 생육후기로 가면서 점점 낮아지는 경향을 보였다. 질소와 칼륨 함량은 줄기보다 잎에서 그 함량정도의 변화가 큰 것으로 조사되었으며, 인산은 잎과 줄기 모두에서 함량 변화가 적었다. 잎들깨의 생육경과 일수에 따른 엽중 주요 다량원소의 평균함량을 연속적으로 조사한 결과 생육초기에는 높은 함량을 유지하다 후기에 낮아지는 경향을 보였다. 7월 1일에 조사된 성적을 보면 질소는 6.34 (5.73~6.95), 인 0.54 (0.43~0.65), 칼륨 2.48 (2.14~2.28), 칼슘 1.98 (1.81~2.12) 및 마그네슘 0.62 (0.43~0.81)%를 나타내었다. 최종 수확기 잎들깨의 양분흡수량은 질소 $382{\pm}66kg\;ha^{-1}$, 인 $22{\pm}2kg\;ha^{-1}$, 칼륨 $262{\pm}43kg\;ha^{-1}$로 질소의 흡수량이 많았다. 잎들깨의 최종 수확기 잎 수량은 $52,000kg\;ha^{-1}$ 이었고, 건물중은 잎 8,680, 줄기 1,830 합계 $10,510kg\;ha^{-1}$이었다.