通过对我省黑土肥力、肥料施用及作物产量情况的监测 ,得出结论 :(1 )有机肥实物施入量基本上大于化肥施入量 ,折纯施入量比例相反 ;(2 )作物养分的吸收大于养分的供给 ;(3)施肥量在一定限度内 ,作物产量随肥料施入量的增加而增加 ,继续增加施肥量 ,增产潜力较小 Through the monitoring of black soil fertility, fertilizer application and crop yield in our province, the conclusion is drawn as follows: (1) The application amount of organic fertilizer is basically greater than that of chemical fertilizer, and the proportion of pure fertilizer is opposite; (2) Of the absorption is greater than the supply of nutrients; (3) the amount of fertilizer within a certain limit, the crop yield increased with the amount of manure applied to increase and continue to increase the amount of fertilizer, yield potential is small