施肥制度改革对粮食生产发展贡献

The contribution to grain-production development caused by the fertilizer-regulation reform

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。

Middle and Long period experiment with 9 kinds of fertilizer models have been done in Hailun Experimental Station suited in temperate zone for 15 years in order that the fertilizer contribution to grain production could be compared and cvaluated. The results showed that fertlizer contribution would be affected by the fertilizer regulation when other technical conditions were maintained. The contribution ratio was about 34% on the best basis of fertilizer condition.