Ảnh hưởng của giá thể đến sinh trưởng và năng suất cây rau quế vị (Limnophila rugosa (Roth) Merr.) canh tác theo hướng hữu cơ

Abstract

Using agricultural wastes to produce organic substrates for organic vegetable cultivation is one of the most eco-friendly practices to reduce environmental pollution caused by these wastes. The objective of this study was to determine the best substrate formulation for growth and yield of Limnophila rugosa under organic-oriented farming. A single factor experiment was laid out in a completely randomized design with seven substrate formulations and three replications. Seven types of substrates were designated based on the composed materials of coconut coir dust, vermicompost, rice husk ash, rice husk, peanut shells. The results showed that the mixed substrates of 10% vermicompost + 60% coconut coir dust + 30% peanut shells led to optimum crop performance and highest yield. Particularly at the third harvesting time, Limnophila rugosa performed the highest number of branches (24.3 branches/plant), branch length (14.9 cm/branch), number of pairs of leaves (5.7 pairs of leaves/branch), leaf chlorophyll content (40.3 SPAD value), plant fresh weight (70.6 g/plant), total theoretical yield (7,133.6 kg/1,000 m²), total absolute yield (5,487.3 kg/1,000 m²) and total commercial yield (4,891.8 kg/1,000 m²).