采用中长期田间试验对 9种模拟施肥模型在温带的中国科学院黑龙江农业现代化研究所海伦实验站进行 15年试验 ,以比较、评价施肥在粮食生产中的贡献 ,结果发现 ,当其它技术条件不变时 ,施肥在作物产量形成中的贡献随施肥制度所影响 ,在最佳施肥条件下 ,施肥在产量中的贡献率为 34 %左右。图 1,表 2 ,参 4。 Nine kinds of simulated fertilization models were used in the mid-long term field experiment for 15 years in Heilongjiang Experimental Station of Heilongjiang Institute of Agricultural Modernization, Chinese Academy of Sciences to compare and evaluate the contribution of fertilization in grain production. The results showed that when other technical conditions were not changed , The contribution of fertilization in the crop yield formation was affected by the fertilization system. Under the optimal fertilization conditions, the contribution of fertilization in the yield was about 34%. Figure 1, Table 2, Senate 4.