The effects of combined application different ratio of A stragalus sinicus and chemical fertilizer on early-rice yield, nutrient absorption, economic benefit and soil properties. The results showed that comparing with no fertilizer treatment(NF), all fertilization treatments including A. sinicus (GM) or chemical fertilizer application alone (CF) and combined application could significantly improve grain yield. Comparing with chemical fertilizer application alone, A. sinicus application alone under same nutrient level of N,P and K (N 117.0 kg/hm2,P2O525.2 kg/hm2,K2O 71.1 kg/hm2) could decrease the grain number per panicle, the grain weight per panicle, 1000-grain weight, seed setting percentage and reduce the grain yield. But combined application of A. sinicus and chemical fertilizer could increase the effective panicle number, the grain number per panicle, the grain weight per panicle, 1000-grain weight, seed setting percentage and improve the grain yield. Furthermore, this combined appliction could promoted nutrients absorption amount and apparent utilizing rate. Under the same nutrient input, the treatment of 1/3CF+2/3GM produced the highest input-output ratio and the highest profit, which compared with CF treat-ment increased by 0.46 and 293 yuan/hm2,respectively. The application of A. sinicus could significantly increase available potassium content.%研究了等氮磷钾养分下紫云英(A stragalus sinicus)与化肥不同配比施用对早稻产量、养分吸收、经济效益及土壤性质的影响.结果表明,与完全不施肥相比,施化肥、紫云英、化肥与紫云英配合施用均可显著增加稻谷产量.与施全量化肥相比,等量养分投入条件下(N 117.0 kg/hm2,P2O525.2 kg/hm2,K2O 71.1 kg/hm2),完全施用紫云英而不施化肥会降低水稻的穗实粒数、穗粒重、千粒重和结实率,导致稻谷减产;而紫云英与化肥配施可增加水稻有效穗数、穗实粒数、穗粒重、千粒重和结实率,从而提高产量.紫云英与化肥配施较施全量化肥或施全量紫云英可增加稻谷及稻草中的养分积累量,可提高氮磷钾养分表观利用率.从经济效益上看,在相同养分供给条件下,以1/3化肥+2/3紫云英的配比产投比和收益最高,与施全量化肥相比,产投比增加0.46,收益增加293元/hm2.紫云英施用可明显提高土壤速效钾含量,提高幅度随着紫云英施用比例的增加而增加.
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