By taking Cixi City as the research area and making location fixed sampling and typical area sampling

the six soil physicochemical properties of organic matter

total nitrogen

available phosphorus

availab1e potassium

conductivity and pH value were selected to analyze characteristics of the temporal and spatial variability of soil quality and discuss the main influence factors on the abundant materials.Results show that soil quality in Cixi City was declining over the past three decades.The single indictors of total nitrogen

available potassium

pH value and organic matter decreased by 1.03

0.46

0.33 and 0.18 and the single indictors of available phosphorus and conductivity increased by 0.5 and 0.42

respectively.The comprehensive indicator of soil quality was reduced by 0.28.The loss of total nitrogen was severe.Spatially

soil quality decreased gradually from north to south and the comprehensive indicator of soil quality was 1.36

1.35

1.43 and 1.18

respectively.The cropping patterns

time length of land reclamation and soil management were the three main factors that influence soil quality.