Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)
- Volume 4 Issue 3
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- Pages.226-234
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- 1984
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- 2287-5824(pISSN)
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- 2287-5832(eISSN)
Seed Production Studies in Italian Ryegrass ( Lolium multiflorum Lam. Itailcum ) I. Effect of seeding time and seed rates of Italian ryegrass, cv. Tetrone on seed production
이탈리안 라이그라스의 종자생산에 관한 연구. 제1보. 파종기와 파종량이 종자에 미치는 영향
Abstract
In order ti find out the optimum seeding time(OST) and optimum seed rate(OSR) of Italian ryegrass on seed production, this studies with tetraploid cv. Tetrone were carried out on the experimental field of Livestock Experiment Station. Treatments included seed rates of 1, 2, 3 and 4 kg per 10a and combined with seeding time on 20, 30 Aug, 9, 19 and 29, September 1983. Seeds were sown in rows 50 cm apart and were spaced in a continuous line with width of 15 cm within the rows. The results are summarized as follows: 1. Autumn tillers could be classified into three groups from winter-killing point of view, namely winter-killing completely, damaged growing point only and living tillers. 2. The young inflorescence-bearing stem in Italian ryegrass which were sown earlier than 9. September were more susceptible to winter killing. Tiller buds in those stems which originated from an axillary buds at the stem base within senescent leaf-sheaths emerged lately in spring, and consequently heading was delayed, culm length shortened and seed yield reduced. 3. Tiller buds which originated from damaged growing point only and living tillers in moderate shoots emerged early in spring and those tillers became mainly spike-bearing culm. 4. The emergence-time of tillers influenced on culm-, spike- length and ripenness more than seeding time and seed rate. 5. Seed yield was mostly affected by the number of spikes per unit area. 6. For the safety of over-wintering and enough spikes on seed production, OST and OSR at Suweon were the last part of September and 2-3 kg per 10a, respectively. Especially OSR was 2 kg per 10a for early and 3 kg per 10a for late OST.
Italian ryegrass의 종자생산(種子生産)을 위한 파종적기(播種適期)와 파종적량(播種適量)을 구명(究明)하기 위하여 4배체품종인 Tetrone을 공시(供試)하여
Keywords