Effects of Fertilization Level on the Agronomic Traits and Quality of Plateau Open-field Vegetable Soybeans
The aim of this study is to explore the effects of nitrogen,phosphorus,and potassium fertilizers on the chlorophyll and nitrogen content,agronomic traits,quality,and mineral content of vegetable soybean leaves grown in open fields on the plateau.We selected Kaikeyuan 5 as the experimental material and used a three factor three-level orthogonal experimental design.The research results showed that the application rates of nitrogen,phosphorus,and potassium fertilizers had a certain impact on the SPAD,N content,agronomic traits,yield,quality,and mineral content of vegetable soybeans.TREATMENT 5 and 6 performed better in terms of SPAD,N content,plant height,plant diameter,number of branches,number of pods per plant,number of two seed pods,number of three seed pods,100 seed fresh weight,and yield,while the control group(CK)had the lowest performance in all indicators;The dry matter,protein,and starch content of treatment 5 and 6 were relatively high;In terms of K,Mg,and Zn content,treatment 5 had the highest con-tent,followed by treatment 6.However,treatment 6 had the highest iron content,reaching 4.93 mg/100g.