中文摘要：

依据29 a的田间施肥小区试验和4 a的养分耗竭盆栽试验,比较分析了不同施肥方式对江南丘陵稻田生产力及抗逆性的综合影响。结果表明,有机无机肥配施（NPK＋OM处理）方式下,双季稻各季和周年生产力最高,其周年平均生物量和籽粒产量比化肥氮磷钾配施（NPK处理）高24.5%和20.2%。与单施氮肥相比,化肥氮磷钾配施显著提高了双季稻的氮素利用效率,而适量增施有机氮能够进一步提高氮素利用效率。化肥单施方式（N和NPK处理）下水稻周年籽粒产量呈递减趋势,下降幅度分别为43.7和1.8 kg.hm-2.a-1,而有机无机肥配施方式下水稻周年籽粒产量呈递增趋势,上升幅度为6.9 kg.hm-2.a-1。平衡施肥方式（NPK和NPK＋OM处理）下,水稻各季及周年籽粒产量的年际变异较小,可持续性产量指数和系统生产力稳定性较高。养分耗竭试验4 a后,各处理水稻各季及周年生物量和籽粒产量高低基本表现为NPK＋OM〉NPK〉N,试验期内周年籽粒平均产量以有机无机肥配施处理最高,说明有机无机肥配施的稻田土壤耐瘠能力高于其他施肥处理。可见,有机无机肥配施不仅能使稻田系统持续保持较高的生产力,而且能够提升系统的抗逆性,有利于江南丘陵稻田系统持续高产稳产。

英文摘要：

Based on a 29-year（1981-2009） field fertilization experiment and a 4-year（2006-2009） nutrient depletion pot experiment,effects of long-term fertilization regimes on crop productivity and stress resistance of the double rice cropping system in the hilly area south to the Yangtze River were analyzed.Results show that Treatment NPK＋OM（application of inorganic NPK plus organic manure） was the highest in productivity of both rice crops and annual field productivity and its annual mean aboveground biomass and mean grain yield was 24.5% and 20.2% higher than Treatment NPK,respectively.Treatment NPK significantly increased N use efficiency,where as Treatment NPK＋OM did even more.Treatment N and Treatment NPK displayed a declining trend in annual grain yield with a magnitude being 43.7 and 1.8 kg·hm-2·a-1,respectively,while Treatment NPK＋OM showed an increasing trend with a range of 6.9 kg·hm-2·a-1.Balanced fertilization（Treatment NPK and Treatment NPK＋OM） significantly decreased the coefficient of variations of crop biomass and grain yields and increased the sustainable yield index（SYI）,resulting in the high stability of crop productivity of the double rice cropping system.After the 4-year nutrient depletion experiment,the treatments basically followed the order of NPK＋OM NPK N in aboveground biomass and grain yield of each rice growing season and the whole year.During the experiment,Treatment NPK＋OM remained at the top in mean aboveground biomass and mean grain yields,indicating that long-term application of NPK plus organic manure may improve tolerance of the paddy soil to nutrient depletion.In conclusion,such a fertilization pattern can not only sustain high productivity of the double rice cropping system,but also enhance the system′s resistance to environmental stresses,which contributes to sustainable high and stable production of the double rice cropping system in the hilly area south to the Yangtze River.