几种基质和NAA处理对橙红龙船花空中压条繁殖的影响

龙船花属植物花色艳丽株型大方、适应性广，是极具观赏价值的热带植物．为了探寻龙船花属植物压条繁殖，以橙红龙船花（ＩｘｏｒａｃｏｃｃｉｎｅａＬ．）为试验材料，研究了不同基质和不同浓度生长激素（Ｎａｐｈｔｈａｌｅｎｅａｃｅｔｉｃａｃｉｄ，ＮＡＡ）对其压条生根的影响．结果表明：泥炭、珍珠岩、水苔和锯木屑４种基质中，水苔的生根效果最好，其生根率为５３.３３％，平均生根数为３.０３根，平均根长为３.５４ｃｍ．另外，分别用５０、１００、１５０、２００ｍｇ／Ｌ４种不同浓度ＮＡＡ处理压条发现，浓度为１５０ｍｇ／Ｌ处理的压条生根效果最佳，生根率为８６.６７％，平均生根数为４.２根，平均根长为３.１３ｃｍ．

Effects of several matrix and NAA on propagation of Ixora coccinea L. by air layering

Ixora plants are an ornamental tropical plant with bright colour，great plant arohitecture andwide range of environmental adaptability． The effect of different substrates and the different concentrationsof NAA on rooting of Ixora coccinea L． were studied by air layering． The results showed that among thefour substrates of peat，perlite，water moss and sawdust，the best rooting effect was water moss with therooting rate of 53. 33%． The average number of roots and average root length in water moss were 3. 03and 3. 54 cm，respectively． In addition，four different concentrations of NAA (50，100，150，200 mg/L)were used to treat the strips． The results showed that 150 mg/L treatment had the best rooting effect．The rooting rate was 86. 67%，the average number of roots was 4. 2，and the average root length was3. 13 cm．