国外种源薄壳山核桃种子催芽试验研究

Experimental research on pecan seed rapid germination of a foreign provenance

以国外种源的薄壳山核桃(Carya illinoensis Koch)种子为试验材料,采用L9(34)正交试验设计,研究了不同激素、激素质量浓度、浸泡时间和基质对种子发芽率、发芽势和幼苗质量的影响,结果表明:以绿色植物生长调节剂(双吉尔)GGR处理的种子平均发芽率比以GA3处理、NAA处理和对照的发芽率分别提高7.9%,14.7%和23.2%,平均发芽势比以GA3处理、NAA处理和对照分别提高7.6%,11.5%和23.9%。用100 mg/L GGR溶液浸泡种子2d,播种在草炭土、蛭石、珍珠岩体积混合比为5∶3∶2的基质中是最佳的催芽方法。

After a foreign provenance of pecan （Carya illinoensis Koch） seed was used as test material, we utilized the L9 （34） orthogonal design to study the effects of different experimental treatments on seed germination rate, emergency and seedling quality. Experimental treatments included diffent phytohormone, phytohormone mass concentration, soaking time and substrate. The results showed that the average germination rate under GGR treatment was increased by 7.9%, 14.7% and 23.2% than GA3 , NAA treatments and CK, and the emergency under GGR treatment was increased by 7.6% , 11.5% and 23.9% than GA3, NAA treatments and CK. Seed soaked in GGR solution with 100 mg/L for 2 days, imbed- ded in mixed substrate of soil ＋vermiculite ＋ perlite （volume ratio 5： 3： 2） could get best germination.