Studies on the Seed Production of Festuca arundinacea Schreb I. Effect of nitrogen Fertilization level and method of its application on the seed production of level and method of its application on the seed production of Festuca arundinacea

톨 페스큐의 종자생산에 관한 연구. I. 질소비료의 시비수준 및 분시방법이 톨 페스큐 ( Festuca arundinacea S. ) 의 종자생산에 미치는 영향

To find out the optimum level of nitrogen fertilization and better distribution of application time for seed production of Festuca arundianacea S. (var. Alta), this filed experiment was performed at Livestock Experiment Station in Suweon, during 1979 to 1981. The treatments used in this study were three nitrogen fertilizing levels (120, 180 and 240kg/ha) and four different methods of nitrogen distribution (i. single application of whole amount in early Spring, ii. 50 percent each in Autumn and early Spring, iii. 50 percent each in early Spring and at begin of heading stage and iv. 50 percent in Autumn and 25 percent in early Spring and at begin of heading stage respectively). The experiment was arranged as a split-plot design with 4 replications and performed at the experimental field of the Livestock Experiment Station in Suweon, during 1979 to 1981. The results obtained are summarized as follows: 1. Date of heading stage of Festuca arundinacea was about May 21 and that of flowering stage was June 1 to 3. The optimum stage for the seed harvesting of Festuca arundinacea (var. Alta) was June 25 about 22 to 23 days after full flowering stage. Average plant height was about 127cm and the panicle length, 24cm. 2. 1000 grain weight was 2.72g and the number of panicles were 85 to 107 per square meter. 3. The mean seed wield for two years was 678.8kg/ha with the average of whole treatments and 781.9kg/ha with the best treatment (50 percent in Autumn and 25 percent in early Spring and at begin of heading stage with 240kg/ha respectively). 4. The average germination rate of harvesting seeds was 87.0 percent and it was increasing trend according to frequent application of fertilizer. 5. The average DM yield of aftermath seed harvesting was 6155kg/ha with two cut, and it was the largest DM yield from the higher nitrogen level and also from the single application in early Spring.

본(本) 시험(試驗)은 Tall fescue(Festuca arundinarea s. 의 Alta품종(品種)에 있어서 채종재배(採種栽培)를 위(爲)한 질소비료(窒素肥料)의 시비수준(施肥水準) 및 분시방법(分施方法)을 구명(究明)코자 3 시비수준(施肥水準)(120, 180, 240kg/ha)과 4 분시방법(分施方法)((1)봄 : 100%%, (2) 가을, 봄 : 각각 50%, (3)봄, 출수전 : 각각 50%, (4) 가을 : 50%, 봄, 출수전 : 각각 25%)으로 분할구(分割區) 4 반복(反覆)으로 포장(圃場) 배치(配置)하여 1979년(年) 9월(月)부터 1981년(年) 10월(月까)지 축산시험장(畜産試驗場)에서 실시(實施)되었다. 1. 톨 페스큐의 출수기(出穗期)는 5월(月) 21일(日), 개화기(開花期)는 이보다 10여일 늦은 6월(月) 1-3 일경(日頃)이었으며 종자(種子) 수확기(收穫期)는 개화성기(開花盛期) 22-23일(日) 후(後)인 6월(月) 25일경(日頃)이었다. 채종시(採種時)의 평균(平均) 초장(草長)은 127cm, 수장(穗長)은 2.72g였으며 $1m^2$당(當) 수수(穗數)는 85-107개(個)였다. 3. 누년(累年) 평균(平均) 종자수량(種子收量) 678.8kg/ha였으며 N-240kg/ha를 가을에 50%, 봄과 출수전(出穗前)에 각각(各各) 25% 시용(施用)한 것이 채종량(採種量) 781.9kg/ha로서 가장 많았다. 4. 채종(採種)된 종자(種子)의 평균(平均) 발아율(發芽率)은 87.0%였으며 분시방법(分施方法)이 다양(多樣)할수록 발아율(發芽率)이 높은 경향(傾向)이었다. 5. 채종후(採種後) 2회(回) 예취(刈取)한 재생목초(再生牧草)의 전체(全體) 평균(平均) 건물수량(乾物收量)은 6155kg/ha였고 질소시비량(窒素施肥量)이 많을수록 생산량(生産量)은 증가(增加)하였으며, 분시방법(分施方法)에 있어서는 봄에 전량시용(全量施用)한 것이 우수(優秀)하였다.