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[Objective] The aim was to find an efficient method to measure available nitrogen,phosphorus and potassium content in vegetable seedling substrate.[Method] The suitable dosage of leaching agent,ratio of the substrate to water and leaching time for the detection of nutrient contents in the substrate by a soil nutrient measuring instrument were discussed firstly,and then the results of nutrient contents measured by the soil nutrient measuring instrument were compared with that by conventional approaches.[Result]In comparison with the conventional methods,the average content of available nitrogen measured by the soil nutrient measuring instrument was slightly higher,while the average content of available phosphorus measured by the instrument was lower; the average content of available potassium measured by the instrument was close to that by the conventional method.[Conclusion] This study could provide us a new method to detect available nitrogen,phosphorus and potassium content in seedling substrate efficiently.
[Objective] The aim was to find an efficient method to measure available nitrogen, phosphorus and potassium content in vegetable seedling substrate. [Method] The suitable dosage of leaching agent, ratio of the substrate to water and leaching time for the detection of nutrient contents in the substrate by a soil nutrient measuring instrument were discussed first, and then the results of nutrient contents measured by the soil nutrient measuring instrument were compared with that by conventional approaches. [Result] In contrast with the conventional methods, the average content of available nitrogen measured by the soil nutrient measuring instrument was slightly higher, while the average content of available phosphorus measured by the instrument was lower; the average content of available potassium measured by the instrument was close to that by the conventional method. could provide us a new method to detect available nitrogen, phosphorus and potassium content in seedli ng substrate efficiently.