NHÂN GIỐNG CÂY BINA CHAYA (Cnidoscolus aconitifolius) BẰNG PHƯƠNG PHÁP GIÂM HOM

Cnidoscolus aconitifolius is a high nutritional crop and newly introduced to Vietnam. However, the crop is difficult to propagate by true seeds. The present study was conducted to investigate asexual propagation of Cnidoscolus aconitifolius through cuttings using different concentrations of α-NAA, cutting position and growing medium. Three experiments were arranged in a randomized complete block design (RCBD) with three replications. The results showed that the tip or base cuttings of C. aconitifolius treated with α-NAA at concentration of 1,000ppm for 30 seconds and then plantedon growing medium conaining smoked rice husk : coconut fiber : sand with a ratio of 2:1:1 were optimal. The C. aconitifolius cuttings grew well, had a high rooting rate of 95 to 97%, large number of adventitious roots (15.17 roots/cutting), longest root length (6.62cm), largest shoot length (8.6 shoots/cutting) and an average leaf number of 9.76 leaves/cutting; green shoot leaves and SPAD, Fv/Fm index of leaves reached the highest values ​​of 40.21 and 0.87, respectively.