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首页> 外文期刊>Journal of Turfgrass Management >Seed priming advances the germination of Kentucky bluegrass (Poa pratensis L.).
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Seed priming advances the germination of Kentucky bluegrass (Poa pratensis L.).

机译：种子引发可以促进肯塔基州早熟禾（Poa pratensis L.）的发芽。

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摘要

Seeds of common Kentucky bluegrass (Poa pratensis) soaked for 4 days at 20鳦 in water had faster germination than untreated seeds provided the hydrated seeds were not dried before sowing. Drying these hydrated seeds greatly decreased percentage germination. Seeds primed (-1.5 MPa, 4 days, 20鳦) matrically in fine vermiculite or osmotically in KNO3 or polyethylene glycol (PEG) 8000 had faster germination than untreated seeds at 15? but synchrony and percentage of germination was not increased. Drying of the primed seeds delayed germination slightly but had no effect on percentage emergence. For seeds primed then dried before sowing, matric priming led to faster germination than osmotic priming. Soaking or matric priming seeds for 8 days at 5?resulted in similar germination advancement at 10 or 30? but the advancement was not as great as that achieved with 4 days of matric priming at 20? The most beneficial presowing treatment was matric priming for 4 days at 20?for it resulted in faster germination than osmotic priming or seed soaking treatments; a response that was more pronounced at 10?than at 30? In a greenhouse experiment (17/13? dayight, sufficient seedbed moisture), matric priming (-1.5 MPa, 4 days, 20? advanced seedling emergence, increased percentage emergence and increased seedling shoot dry weights compared with untreated seeds. This increased seedling growth was associated with earlier germination and not with increased growth rate.
机译：在播种前未水合种子干燥的情况下，普通肯塔基草（Poa pratensis）在20°C的水中浸泡4天的种子发芽的速度比未处理种子快。干燥这些水合种子会大大降低发芽率。在15？3的温度下，在细ver石中底涂（-1.5 MPa，4天，20鳦）或在KNO3或聚乙二醇（PEG）8000中渗透处理的种子发芽快于未处理的种子。但是同步性和发芽率没有增加。引发的种子干燥略微延迟了发芽，但对出苗率没有影响。对于播种后播种并在播种前干燥的种子，基质浸种引发的发芽速度要快于渗透浸种。在5？浸泡8 d或基质激发的种子会在10或30？发生类似的发芽进程。但进步并不如20天时进行4天的基质灌注所取得的进步？最有利的播种前处理是在20？的条件下进行基质引发4天，因为它比渗透引发或种子浸泡处理能更快地发芽。 10点比30点更明显在温室试验中（17/13？日/夜，足够的苗床水分），与未处理的种子相比，基质引发（-1.5 MPa，4天，20？）提前出苗，出苗百分率增加，苗芽干重增加。幼苗的生长与较早的发芽有关，而不与生长速率的增加有关。

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