Taking 1 184 research reports and 161 soil samples from 1996 to 2014 of open vegetable fields
in Beijing as basis， this paper analyzed the interannual changes in fertilizer type， application quantity， nutrient
balance， and soil available nutrients. The results showed that compared with the 1990s，the main application of
organic fertilizer including manure，duck manure，cow dug turned to chicken manure at the present stage in open
vegetable fields. While chemical fertilizer tended to be a single type. Farmers preferred to apply macronutrient
fertilizers， lacking secondary，micro-elements addition. Compared with the 1990s， although the annual
fertilization application and annual nutrient surplus were obviously went down and alleviated at present stage， the
N， P nutrients input were still exceeded crop absorbing capacity， and not in conformity with crop absorption law.
The unreasonable N，P，K input ratio， N，P surplus and K deficit still existed. Evaluation on soil of present
open vegetable fields indicated that these fields lacked alkali-hydrolyzable nitrogen， and the content of available
phosphorus was excessive， only the available potassium level was appropriate.