Abstract:

Abstract: Xianyang vegetables cultivation area is one of representatives of sunlight greenhouse in Shannxi province, where the fertilization and the nutrient, salinity as well as PH of greenhouse soil, is investigated and analyzed in terms of planting years. The results show that most of vegetable greenhouses are insufficient of organic fertilizer, that fertilizer is partially or excessively applied, that application methods is constrained traditionally and application benefit is undesirable, that the organic elements, total nitrogen, available nitrogen in soil is low, while nitrate nitrogen（NO3-）, phosphorus and potassium abounds. All these factors caused the nutrient imbalance, salinity increase and PH decrease of soil. Solutions are suggested according to the study: the expansion of soil test and formula fertilization technique, the increase of application of fine organic fertilizer, the amelioration of fertilizing method, the selection of new-type special fertilizer, and the enhancement of cultivating management, etc.