不同品种多年生黑麦草种子适时收获期以及生产性能的研究

供试 13个多年生黑麦草 (Loliumperenne)品种Napoleon、Thetramax、Mikado、Juventus、Pimpernel、Simberia、Burton、Tonga、Taya、Figaro、Sakini、Tivolia、Pick wick均适宜在宁夏引黄灌区种植。各品种分别于花后 2 1.2— 2 8.6d小穗干物质重达最大 ,小穗含水量为 38.3— 44.8%。此时收获的种子发芽率已基本稳定 ,种子落粒少产量高。供试品种第一年种子产量Taya最高 12 6 1.8kg/hm2 。Figaro、Sakini次之。Juventus产量最低为 5 2 4.1kg/hm2 。

结缕草种子的采集

结缕草为禾本科结缕草属植物,是固土护坡、城市绿化以及铺设运动场地的主要草种之一,为世界广泛应用。我国其种子出口量逐年增大,已销往南朝鲜和日本。该草在我国自辽东半岛至海南岛,均有分布,辽宁东部山区和辽东半岛有丰富的资源。结缕草抗性强、耐寒,对土壤条件要求不太严格,而且具匍匐茎和根茎。

高羊茅矮生新品系J168种子生产性能评价

为满足市场对粗放型草坪草品种的需求,我所育成高羊茅矮生新品系"J168",并开展"J168"种子生产性能评价试验,旨在新品系更好的推广服务于生产。试验结果表明,高羊茅矮生新品系"J168"生育天数达242天,与参试对照间差异不显著。种子生产产量可达856.2 kg/hm2,低于对照自育品种"黔草1号"873.7 kg/hm2,高于对照引进品种"凌志"712.3 kg/hm2,表观出较好的种子生产潜力。种子发芽率中等,低于"凌志",高于"黔草1号"。结合高羊茅种子产量构成因子分析结果,生殖枝数是种子增产的关键,J168生殖枝数表现优良,但同时需在种子生产阶段,辅助施肥措施,同时提高其千粒重,保证其种子活力。

Comparison on Seed Production of Various Orchardgrass

[ Objective] To find orchardgrass cultivars which have high seed production and can be planted in western Chongqing region. [ Method] Seed production and phenophase were compared between several common orehardgrass cultivam （domestic or foreign） in western Chongqing region. A high-yield high-quality orchardgrass line suitable for seed production in western Chongqing region was found, [ Result] The orohardgra^s in western Chongqing region had excellent seed production performance. Among these cultivars, orGhardgrass 01076 had the highest seed produc. tion, up to 512 kg/hm^2. Its germinability, germination rate and germination index were also highest, 49%, 84% and 11, respectively. [Condusion] The orchardgrass 01076 is worth planting in large scale in westem Chongqing region for seed production.