ISHS Acta Horticulturae 627: XXVI International Horticultural Congress: Toward Ecologically Sound Fertilization Strategies for Field Vegetable Production
EFFECTS OF ORGANIC NUTRIENT SOLUTION ON GROWTH AND QUALITY OF PAK-CHOI UNDER SOILLESS CULTURE |
| Authors: | W. Liu, S. Li, D. Chen |
| Keywords: | Soybean residue, fermentation, yield, soluble protein, nitrate |
| Abstract:
Pak-choi (Brassica campestris ssp. chinensis (L.) Makino) is the most popular leafy vegetable in south China. Studying new technique to improve the growth and quality of pak-choi was the aim of the paper. Soybean residue was chosen as the source of organic nutrient solution for its high nitrogen content (24.19%) and proper ratio between nitrogen, phosphorus and potassium for vegetable growth. Effects of organic nutrient solution on pak-choi growth and quality were studied by supplying pak-choi with organic and inorganic nutrient solution respectively under substrate culture. The concentration of each element in inorganic nutrient solution was kept at the same level as those in organic nutrient solution. The results showed that the yield of pak-choi supplied with organic nutrient solution was 25.52% higher than the yield of pak-choi supplied with inorganic nutrient solution in winter experiment. In the experiment of spring the yield was the same. The soluble protein and β-carotene contents of pak-choi fed organic nutrient solution were higher than that fed inorganic nutrient solution in both two seasons experiments. The differences of chlorophyll, vitamin C, nitrite, water and mineral element contents between the treatments were not significant. The dynamic curve of nitrate content of organic treatment was below the curve of inorganic treatment. Organic nutrient solution made from soybean residue improved pak-choi quality to a certain extent. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
