印楝种子寿命较短，在自然状态下，随着贮存时间的延长，生活力逐渐下降，其发芽能力也迅速降低。贮藏3周时，种子发芽率在80％左右，后迅速下降，尤其在第4周至第7周，每周发芽率降低约10％，至第8周时，其发芽率降到20％以下。在播种前采用1％H2SO4浸种15min或65℃温水浸种30min对印楝种子进行浸泡处理，可有效提高印楝种子发芽率和发芽势，其发芽率可达90％以上。育苗基质以50％大田土（苗圃内本土）＋29％腐质土＋10％河沙＋10％厩肥＋1％的复合肥的育苗效果较好。%Neem seeds have a shorter life expectancy. Under the natural conditions,with the extension of storage time, their living viability will gradually drop, and their germination capability will also fall rapid- ly. After 3-week storage time, their germination rate is about 80%, then drops rapidly. Especially from the fourth to the eighth week, their germination rate drops about 10% per week, and to the eighth week, their germination rate reduces under 20%. Before sowing, by soaking seeds, their germination rate and germinative force can be efficiently increased. The specific method is to soak for 15 minutes with 1% H2SO4 or soak for 30 minutes in 65℃ water,which can efficiently increase the germination rate to above 90%. As for choice of breeding matrixes, experiments have shown that the composition of 50% local land soil (soil in nursery) + 29% humus soil +10% manure + 10%sand + 1% compound fertilizer is better.
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