漂浮育苗不同基质配比对除虫菊苗素质的影响

利用烤烟小拱棚进行除虫菊漂浮育苗试验，以草炭、腐殖土、膨化珍诛岩和蛭石等为原料，采用不同配比的除虫菊漂浮育苗基质为试验因子，从出苗率、成活率、分蘖率和除虫菊的主要农艺性状、干物质积累量、黄叶数等方面进行探讨研究。结果表明，基质配方D（40％草炭＋50％腐殖土＋20％膨化珍珠岩＋10％蛭石）培育出来的除虫菊苗，出苗率、成活率和分蘖率高，干物质积累量多，根系发达，叶片和株高适中，因此除虫菊苗的综合素质最好。

Effect of Different Substrate Compositions of Floating-Seedbed on Quality of Pyrethrum Cineraefolium Seedling

Using the peat, humus soil, fine perlite and vermiculite as substrate materials, this floating seedling experiment of Pyrethrum cineraefolium was carried out in a small arch shed of tobacco. We studied the effects of different proportions substrate formulas on the sprouting rate, survival rate, tillering rate, main agronomic traits, dry mass accumulation as well as numbers of yellow leaf of Pyrethrum cineraefolium. The results showed that the best plantlet diathesis produced among five tested mixing proportions was occurred in such substrate formula as 40% peat＋30% humus soi1＋20% fine perlite＋10% vermiculite. The seeding of Pyrethrum cineraefolium presented such characteristics as relatively high rates of sprouting, survival and tillering, high dry mass accumulation, welldeveloped root system.as well as the medium plant height and numbers of leaf.