烟田杂交晚稻肥料的合理施用研究

A Study on Fertilizer Application for Hybrid Late Rice in Tobacco Field

以新香优80为材料,研究了烟田杂交晚稻的肥料施用。结果表明:合理施肥(施N60kg、K2O 30kg/hm2加烟秆还田)的晚稻产量为7068 kg/hm2,比两种烟农习惯施肥分别高产1831kg/hm2和2021kg/hm2,分别增产35.0%和40.0%。合理施肥节省化肥N50%,N肥产投比为1.37,比两种烟农施肥分别高101%和108%;N肥偏生产力为70.7kg籽粒/kgN,比两种烟农施肥分别高116%和124%。晚稻合理施肥的稻蓟马、纵卷叶螟、纹枯病、稻飞虱等主要病虫害明显比两种烟农施肥轻。

A study on fertilizer application for hybrid late rice in tobacco field has been carried out taking Xinxiangyou 80 as material and the results show that the late rice yield for the Rational Fertilization Treatment （applying 60 kg of N and 30 kg of K20 per hectare plus returning tobacco straw into the fields）is 7068 kg per hectare, 1831 kg and 2021 kg higher than the two Tobacco Peasant Fertilization Treatments respectively and increased by 35.0% and 40.0%. The Rational Fertilization Treatment saves 50% of chemical fertilizer N. The output/input ratio of nitrogen fertilizer is 1.37,101% and 108% higher than the two Tobacco Peasant Fertilization Treatments respectively.The bias productive forces of nitrogen fertilizer is 70.7 kg grain/kg N,116 % and 124% higher than the two Tobacco Peasant Fertilization Treatments respectively. The main diseases and insect pests of late rice for the Rational Fertilization Treatment,such as rice thrips,rice leaf rollers,sheath and culm blight of rice,rice plant hoppers and so on are much less than the two Tobacco Peasant Fertilization Treatments, and the exterior qualities of rice have been improved greatly as well.