EFFECT OF NUTRIENT SOLUTION FROM SOYBEAN RESIDUE ON THE GROWTH AND YIELD OF MUSTARD GREEN (Brassica juncea L.)

Abstract

The study was conducted from February to August 2024, in Chau Thanh, Kien Giang, including 02 experiments. Experiment 1: The effect of probiotics on the decomposition of soybean residue into an organic nutrient solution. The experiment was arranged in a completely randomized design, with 3 repetitions, with 4 treatments as follows: (1) Clean water (Control); (2) CPVS 1; (3) CPVS 2; (4) CPVS 3. The results showed that soybean meal incubated with microbial product 2 (BDN + CPVS 2) was the most suitable with the highest total nitrogen, total potassium and total phosphorus. Experiment 2: The effect of the concentration of organic nutrient solution from soybean residue on the growth, yield, and quality of mustard greens. The experiment was arranged in a completely randomized design with 3 repetitions, including 07 treatments: (1) Spraying clean water (Control); (2) Ratio of earthworm fluid: water (1:500); (3): Ratio of nutrient solution: water (1:50); (4): Ratio of nutrient solution: water (1:100); (5): Ratio of nutrient solution: water (1:200); (6): Ratio of nutrient solution: water (1:300); (7): Ratio of nutrient solution: water (1:400). As a result, the nutrient solution with the ratio of soybean residue (DBDN) and water (1:50) - DBDN: water (1:50) gives the best yield of mustard greens (1.13 kg/m²) and growth.