Perennial Ryegrass 품종의 계절적 생육특성 III. 가을철 생육의 품종간 차이

Seasonal Growth Chrateristics of Perennial ryegrass varieties III. Varietal differences in autumn growth

본 시험은 가을철 생육기에 perennial ryegrass 5개 품종을 공시하여 생육시기별 품종에 대한 생물학적 수량(지상부중+지하부중), 지상부중(엽중+경중), 근중, 엽면종, 지상부/지하부 비솔, 경수, 근장,근장/근중 및 1 경중을 조사하였으며 시험 결과는 다음과 같다. 1. 수량구성요소는 생육이 진행됨에 따라 악화되었다. 2. 가을철 수량구성요소의 비솔은 지상부 73%, 지하부 27%였다. 3. 생물학적 수량이 많았던 품종은 Tempo, Maprima 였으며 P-2, Caliente등이 적었다. 4. 수량구성요소는 Tempr 품종에서 경중, 근중, 근장/근중, 1 경중이 많았고 Caliente 품종은 엽중, 경중,엽면종, 지상부/지하부/ 비솔, 1 경중이 적었다. 5. 조사시기별 생물학적 수량은 4~5차(10월 4일 ~10월 8일 )에 가장 높았으며, 3~4차(9월 30일~10월 4일)에 가장 낮았다. 6. 품종별 생물학적수량은 Tempo는 5~6차(10월 8일 ~10월 12일), Marprima는 1~2차(9월 22일 ~9월 26일), Manhattan, P-2, Caliente는 4~5차(10월 4일 ~10월 8일)에서 많았다.

This experiment was conducted to study the factors related with yield components in 5 varieties of perennial ryegrass and was surveyed for the biological yields(BY). shoot weight(SHW). root weight (RW), leaf weight(LW), stem weight(SW), plant length(PL), leaf area(LA), number of tillcr per plant (NT), root lcngth(RL), shoot and root ratio(S/R), ratio of root length and weight(RL/RW) and weight of a tiller(WT) in autumn growth stage. These results are summarized as follows;1. The yield components were varied during the stage of growth and in relation to the varieties in autumn. 2. The yield is consisted of 73 % by shoot and 27% by root in autumn.3. The varieties of the highest biological yields were Tempo, Maprima and the lowest biological yields were P-2, Caliente in autumn. 4. The variety of Tempo was largely affected by the factors of shoot weight, root weight, ratio of root length and weight, and weight of a tiller. but the variety of Caliente was influenced by the factors of leaf weight. stem weight, leaf area, SIR ratio and weight of a tiller on the yield. 5. The highest biological yields was obtained at the time of 4~5th(10/4~1018) and the lowest yield was showed at the time of 3~4th(9/30~1014) in autumn. 6. The time of the highest biological yields were resulted that the variety of Tempo was obtained between the time of 5~6th. Maprima was obtained between the time of 1~2nd and the varieties of Manhattan, P-2, Caliente were obtained between the time of 4~5th on the stages of growth in autumn.