The effects of combining application of organic and inorganic fertilizers on the quality and yield of greenhouse cucumber and the activity of nitrate reductase were assessed by use of greenhouse culture.The results indicated that,the best ratio of organic and inorganic fertilizers was 1∶4 under the same nitrate application condition,cucumber crude protein content increased 4.0%,7.4% and 3.1% with non-fertilization,organic fertilizer and inorganic fertilizer treatment,while vitamin C content increased 13.1%,...