Changes of soil physical and chemical properties in greenhouse of different grapevine planting years

【Objective】To provide basic knowledge for soil improvement,rational fertilization and the sus-tainable production in grape orchard.【Methods】The effects of soil physical and chemical properties withthe extension of planting years in plastic house were investigated. The soil at same site from 2-,7- and12-year plastic houses were collected to analyze the changes in soil physical and chemical properties inJue'yu Town,Tai'an City. The soil outside plastic houses was as control.【Results】Soil bulk density inall plastic houses were significantly higher than control,and the peak value showed in 7-year plastichouse,followed by 12-year greenhouse. With the extension of planting years,soil total porosity and aera-tion porosity in plastic houses decreased. p H value in plastic houses declined in comparison to controland the soil in the 7-year greenhouse showed the lowest p H of 5.0. While conductivity and total salt con-tent were higher than control,and surface soil had a higher content than subsoil layer. The total nitrogencontent in greenhouses was lower than control,while total P and N content were higher than control,andthe peak value showed in 7-year plastic house. Ca2 +,Mg2 +and Cl- were the main ions in soils outsideplastic houses,while Ca2 +,K+,SO42-and NO3-were the main ions in soils of 7- and 12-year plastichouse. In addition,K+,Ca2+,Mg2+,SO42-and NO3-contents were significantly negatively correlated withsoil p H value.【Conclusion】The results suggested that excessive fertilizer may cause soil acidification,soil salinization,surface soil eutrophication and Cu,Zn accumulation in the greenhouse.