萘乙酸浓度对水土保持植物蟛蜞菊扦插育苗的影响

为了提高蟛蜞菊扦插苗的成活率,采用3种不同浓度萘乙酸(NAA)浸渍蟛蜞菊插条基部1h进行对比实验。结果表明:浓度为200mg/L的萘乙酸下的蟛蜞菊的插穗生根率达到100%,根粗、根数、最长根长、根系总体积均显著增大,同时地上部分的生长得到了促进。浓度为100mg/L的萘乙酸对扦插苗地上及地下部均具有促进作用。浓度为300mg/L的萘乙酸对扦插苗地上部具有促进作用,但对插穗的生根率及根数有抑制作用。试验表明,200mg/L的萘乙酸对蟛蜞菊扦插苗的生长促进效果最明显。

The Influence of Concentrations of Naphthylacetic Acid(NAA) on Cutting Propagation of Water and Soil Conservation Plant-Wedelia Trilobata Hitchc

In order to improve the survival rate,the effect of naphthylacetic acid(NAA) on cuttage propagation of Wedelia Trilobata Hitchc was studied based on the basal part of cutting Wedelia Trilobata Hitchc soaked for 1 h with different concentrations of NAA(100 mg/L,200 mg/L and 300 mg/L).The results showed that the rooting rate treated with 200 mg/L NAA was 100%.At the same time,root diameter,root number,length of the longest root and total volume of root system increased significantly,the aboveground part of Wedelia Trilobata Hitchc showed increasing trend.100 mg/L NAA improved the aboveground part and underground part of the cuttage.300 mg/L NAA improved the aboveground part of the cuttage,however,it inhibited the rooting rate and root number of the cuttage.In brief,the facilitation for growth of cuttage seedling treated with 200 mg/L NAA was the best.