苏铁播种育苗技术研究

Research on technology of sowing and cultivating seedling of cycad (Cycas revoluta)

通过研究不同浓度ABT3号生根粉、不同浸种时间、不同播种时间和地膜覆盖对苏铁种子发芽、成苗及幼苗生长的影响,不同透光度和叶面肥对出苗速度、发芽率、叶绿素含量的影响结果表明,0.02μg/kg浓度生根粉处理最为有效,使发芽率和成苗率达60％以上,与其他处理相比差异明显;而浸种时间效应较弱,播种时间效应明显,4月13日播种最佳,出土所需时间最短,与其他处理相比差异显著。覆盖地膜能显著提高苏铁种子的发芽率和成苗率,并使出土时间明显缩短;透光度对叶片的生长和叶绿素含量影响明显,60％的透光度最佳,喷施叶面肥能显著促进苏铁叶片生长,提高叶绿素含量。

Effects of ABT powder for rooting (No. 3) and times of seed soaked, sowing period and field-membrane cover on the germination percentage (GP), formation percentage of seedling (FPS) and growth of seedling are studied in order to increase the efficiency of sowing and cultivating seedling of cycad. Effects of photic percentage and leaf-fertilizer on sprouting velocity, GP and chlorophyll contents are also included in this paper. Results showed that concentration of 0. 02/ug/kg for rooting powder was most useful, making GP and FPS amount to above 60 percentage and being significantly different from the other concentration. Effect of soaking seed time on tested indicators was not obvious. Effect of sowing period on them was distinct and best result was got by means of sowing in April 13. The time needed for sprouting was shorter than that by any other treatment. GP and FPS was increased significantly and sprouting time was shortened by means of field-membrane cover. Effects of photic percentage on leaf growth and chlorophyll content were obvious. Sixty photic percentage was most profitable. Leaf growth and chlorophyll content of cycad were enhanced distinctly by use of leaf-fertilizer.