中文摘要：

依据江南丘陵地区双季稻田28年（1981—2008年）长期绿肥还田的田间定位试验和4年的养分牦竭盆栽试验，分析比较了长期不同量绿肥还田对稻田系统生产力和抗逆性的综合影响。结果表明，常量绿肥还田和高量绿肥还田处理下，早稻、晚稻和历年的全年平均籽粒产精和生物学产鲢及其变异系数与长期单施化肥处理差异不显著，但由于绿肥还田处理施用绿肥替代部分化肥，平均每年的化肥N、P和K投入量比单施化肥处理分别减少90．0、9．9和72．0kg／hm^2。绿肥处理的双季稻全年产量呈上升趋势，而长期化肥处理则呈下降趋势。且前者的全年产量可持续性产量指数均略高于后者，常量绿肥还幽下稻田系统的耐瘠能力也显著高于长期单施化肥处理。不同量绿肥还田下稻田系统生产力差异不显著,但耐瘠能力常量还田处理较高.

英文摘要：

The effects of long-term green manure application on the productivity and stress resistance of a double rice cropping system were investigated in a 28-year field experiment with different fertilizing regimes and in a 4-year pot experiment of nutrient depletion. The results showed that no significant differences were observed in the mean biomass and grain yield of early rice, late rice and the whole-year between the green manure application and the chemical fertilization treatments over the 28-ycar period, whereas green manure application decreased the rates of chemical N, P and K fertilizer application by 90.0 kg/hm^2 , 9.9 kg/hm^2 and 72.0 kg/bm^2 , respectively. The whole-year grain yield followed an increasing trend under the two green manure application treatments, while a declining trend were found under the chemical fertilization treatment. The 4-year pot experiment indicated that green manure application could enhance the resistance of the double rice cropping system to nutrient depletion, especially in the plots with moderate green manure amendment. Although there was no significant difference in the productivity of double rice cropping system between the green manure application treatments, the resistance to nutrient depletion was greater at the moderate application level than the high application level.