稻鸭共作对稻田营养生态及稻米品质的影响

Effect of rice-duck mutualism on nutrition ecology of paddy field and rice quality.

通过稻、鸭之间的共生互作 ,共生期不施用任何农药和化肥 ,进行优质无公害水稻生产 .结果表明 ,稻鸭共作的除草效果达到 99 4 %以上 ,病虫害基数明显降低 ;水体营养物质和溶解氧增大 ;土壤速效养分有一定提高 ,但成熟后土壤速效P、速效K较基础肥力有一定降低 ;植株N、P、K吸收量增加 ;产量明显提高 ,构成因素中成穗率、实粒数和结实率增加 ;稻米的加工品质、外观品质、营养品质及蒸煮品质得到改善 ,尤以降低垩白率效果最为明显 ;

The production of nuisanceless rice was conducted by the technique of rice-duck mutualism without applying any pesticide and chemical fertilizer.The results showed that compared to the control,the effect of eliminating weeds was over 99.4%,and the cardinal numbers of plant diseases and insect pests reduced obviously.Nutrients and dissolved oxygen in paddy water and rapidly available nutrients in soil increased,but after maturing stage,compared to basal fertility,rapidly available P and K decreased.The N,P,and K absorption amounts of rice plant,rice yield,setting panicles rate,filled grains and ripened rate increased.The milling,appearance,nutritional,cooking and eating quality of rice improved,especially in reducing chalkiness.The comprehensive benefits of paddy field enhanced obviously.