摘要
根据三个地点中长期田间试验联网研究发现 ,施肥在作物产量形成中的贡献受施肥制度和气候的热量因子所影响 ,在最佳施肥条件下 ,施肥在产量中的贡献率分别为海伦 (温带 ) 0 .31,沈阳 (暖温带 )0 .39和桃源 (亚热带 ) 0 .4 2 ,存在明显的地理分异现象 .由此可以得出 ,当其他技术条件不变时 ,施肥在产量中的贡献率最高可达 30 %～ 4 5 % ,随所在地区气候的热量条件而不同 .通过对施肥与气候热量之间的交互影响研究还发现 ,沈阳与桃源间的交互影响远大于海伦与沈阳之间 。
The results of long-term field experiments at three stations in different areas of China indicated that the contribution of fertilization to crop yield was significantly affected by the thermal condition of climate and the fertilization system. In the case of optimum fertilization, the largest contribution rate was 0.31 (average of fourteen years) at Hailun Station (in temperate zone), 0.39 (average of twelve years) at Shenyang Station (in warmer-temperate zone), and 0.42 (average of eleven years) at Taoyuan Station (in subtropical zone), which showed that the existence of geographic differentiation was caused by the thermal condition of local climate. Therefore, keeping the optimum fertilization systems, the largest contribution rate to crop yield could be estimated from 30% to 50%, depending on the local climate condition. The interaction of fertilization and thermal factor between Shenyang and Taoyuan was much bigger than that between Shenyang and Hailun. The interaction between organic manure and thermal condition of local climate was bigger than that between chemical fertilizer and thermal condition of local climate.
出处
《应用生态学报》
CAS
CSCD
2003年第11期1855-1858,共4页
Chinese Journal of Applied Ecology
基金
中国科学院知识创新工程重大项目(KZCX2 4134)
中国科学院"九.五"重点项目(KZ95 2 J1 2 14 )
中国科学院沈阳应用生态研究所创新资助项目(SCXMS0 3 0 1)
关键词
施肥贡献
地理分异
交互作用
Contribution of fertilization, Geographic differentiation, Interaction
