RESEARCH ON INTENSIVE CULTIVATION TECHNIQUES OF Anoectochilus setaceus Blume UNDER THE CANOPY OF NATURAL FOREST IN LAI CHAU PROVINCE

Abstract

Anoectochilus setaceus Blume, naturally distributed in Lai Chau province, is a rare and precious medicinal plant with high medicinal and economic value. However, currently wild populations of A. setaceus in the nature were seriously declining in quantity, due to overexploitation. Current methods of growing A. setaceus were mainly extensive farming, or growing in greenhouses and mainly using seeds from tissue. Thus, it is necessary to research and identify technical measures for intensive cultivation of A. setaceus under natural forest canopy to improve productivity and contribute to the conservation and sustainable development of this rare genetic resource. Research results show that, after planting 19 months, A. setaceus in the experimental models all grew and developed well, with a survival rate of over 80%. Growth of A. setaceus in intensive planting experiments has shown differences between experimental formulas. Experimental formula for planting density (planting with low density: 13 plants/m² or 25 plants/m² or planting with high density: 50 plants/m²; fertilizer application through leaves with dose of 0.02 ml Atonik 1.8 SL/m²; watering with twice a day (2 minutes each time, 4 liters/m²) and planting in the main Spring season (early February) was most suitable for the ecological and site conditions in Lai Chau province A. setaceus in the experimental formulas had high total flavonoid and polysaccharide content compared to other naturally distributed A. setaceus in Lai Chau province, partly due to the accumulation of nutrients of the cultivated species. The results of this study are the basis for applying and developing this precious and rare tree species under the natural forest canopy in Lai Chau province