Influences of Planting Density on Growth and Yield of Perilla frutescens BRITTON var. acuta KUDO

자소(紫蘇)의 재식밀도(栽植密度)가 생육(生育) 및 수량(收量)에 미치는 영향(影響)

In order to determine the optimum planting density of Perilla frutescens which is suitable for the southern part of Korea, agronomic characters, yield of fresh stem, leaf and seed, and yield components were investigated grown in 1985 and 1986 at Mokpo Branch Station of Crop Experiment Station. The heading date was Aug. $14{\sim}15$ and the blooming period was Aug. $19{\sim}21$ regardless of the difference of plant density, but the longest stem length was 135cm in the plant density of $70{\time}40cm$ and the stem length in the plant density of $80{\time}40cm$ was 134cm. The quantity of fresh weight of stem and leaf and fresh weight of seed was high as 531kg/l0a in the plant density of $80{\time}40cm$. The positive correlation such as $0.7315^*,\;0.9024^{**}\;and\;0.7425^*$ were found between stem length and fresh weight of stem and leaf, stem length and fresh weight of seed, fresh weight of stem and leaf and fresh weight of seed and so high significance was recongnized. In the verification of significance of row spacing, the disperse of the stem length was $55.67^{**}$, that of fresh weight of stem and leaf is $268.50^*$, theat of fresh weight of seed was $16.00^{**}$ and high significance was recognized. In the verification of significance of intrarow spacing, the diperse of stem length was $54.21^{**}$, that of fresh weight of stem and leaf was $2,582.00^{**}$, that of fresh weight of seed was $48.00^{**}$ and then high significance was recognized. Accordingly, the proper plant density of perilla frutescens was 80cm of row $spacing{\time}40cm$ of intrarow spacing.

전남(全南) 무안에서 1985년 4월부터 1986년 10월까지 2년간 4월 20일에 파종(播種), 5월 30일에 재식밀도(栽植密度)를 달리하여 이식(移植)하였을때 생육(生育)과 수양(收量)에 미치는 영향(影響)을 구명(究明)하였던바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 출수기(穗期)와 개화기(開花期)는 재식밀도(栽植密度)는 차(差)에 관계없이 8월 $14{\sim}15$일에 출수(出穗)하여 8월 19일${\sim}21$일에 개화(開花)하였으나 경장(莖長)은 $70{\time}40cm$의 재식밀도(栽植密度)에서 135cm로 가장 길었고 $80{\time}40cm$의 재식밀도(栽植密度)에서는 134cm로 1cm 정도 짧았다. 2. 생경엽중(生莖葉重)과 생자실중(生子實重)은 $80{\time}40m$의 재식밀도(栽植密度)에서 531kg/10a로 수량(收量)이 가장 높았다. 3. 경장(莖長)과 생엽경중(生葉莖重), 경장(莖長)과 생자실중(生子實重), 생엽경중(生葉莖重)과 생자실중(生子實重) 간(間)에는 $0.731^*,\;0.9024^{**},\;0.7425^*$로 정(正)의 상관(相關)으로 고도(高度)의 유의성(有意性)이 인정(認定)되었다. 4. 휴폭(畦幅)의 유의성(有意性) 검정(檢定)에서 경장(莖長)의 분산(分散)은 $55.67^{**}$, 생엽경중(生葉莖重)의 분산(分散)은 $268.50^*$, 생자실중(生子實重)의 분산(分散)은 $16.00^*$으로 고도(高度)의 유의성(有意性)이 인정(認定)되었고 주간(株間)의 유의성(有意性) 검정(檢定)에서 경장(莖長)의 분산(分散)은 $54.21^*$, 생경엽중(生莖葉重)의 분산(分散)은 $2,582.00^{**}$, 생자실중(生子實重)의 분산(分散)은 $48.00^{**}$으로 고도(高度)의 유의성(有意性)이 인정(認定)되었다. 따라서 자소재배(紫蘇栽培)의 적정 재식밀도(栽植密度)는 휴폭(畦幅) $80cm{\time}$매간(妹間) 40cm이었다.