ẢNH HƯỞNG CỦA TỶ LỆ PHỐI TRỘN VÀ LOẠI PHÂN Ủ SỬ DỤNG TRONG GIÁ THỂ ĐẾN SINH TRƯỞNG VÀ NĂNG SUẤT MỒNG TƠI (Basella alba L.) TẠI GIA LÂM - HÀ NỘI

The study was conducted to determine the mixing ratio and type of compost used in the growing substrate suitable for the growth and yield of Basella alba L. The factorial experiment was arranged in a randomized complete block design (RCBD) with 3 replications including 6 treatments (P1G1, P1G2, P1G3, P2G1, P2G2, P2G3) of 2 types of compost (P1 and P2) and 3 mixing ratios of compost in growing substrate (G1 (1 soil : 1 burnt rice husk : 1 compost); G2 (1 soil : 1 burnt rice husk : 2 compost); G3 (1 soil : 1 burnt rice husk : 3 compost)). The monitored parameters included plant height, stem diameter, SPAD index, leaf area, dry matter weight, yield and nitrate content in the plant. The results showed that increasing the ratio of compost P1 or P2 mixed in the growing substrate had a positive effect on the growth and physiological parameters, thereby significantly increasing the individual yield of malabar spinach. The nitrate contents in plant fertilized with compost P1 and P2 at different mixing ratios were within the allowable limits of the Ministry of Agriculture and Rural Development. Therefore, compost P1 and P2 should be fertilized with a substrate ratio of 1 soil: 1 burnt rice husk: 3 compost for better growth, high yield and quality of malabar spinach.