棉花学报2023，Vol.35Issue(5)：398-411,14.DOI:10.11963/cs20230029
新型氮肥增效剂N-life对棉花生理特性、氮肥利用率、产量和纤维品质的影响
Effects of N-life on the physiological characteristics,nitrogen use efficiency,lint yield,and fiber quality of cotton
摘要
Abstract
[Objective]The effects of nitrogen fertilizer synergist N-life(main active ingredient:nitrapyrin)on cotton were studied,so as to provide theoretical support for the application of N-life in cotton production.[Method]The field experiment and pot experiment were carried out at Sanya,Hainan province in 2021 and 2022 with Zheda 12 as the experimental material.A field experiment was designed with two factors split-plot.The main plot was N-life application level(1.5 and 0 kg per 667 m2),and the secondary plot was pure nitrogen application level(normal nitrogen rate:19.0 kg per 667 m2,and reduced nitrogen rate:17.1,15.2,and 13.3 kg per 667 m2).The effects of different treatments on physiological and biochemical indexes at the seedling stage,flowering and boll stage,and boll opening stage,agronomic traits,yield and fiber quality of cotton were analyzed.And the effect of N-life on nitrogen use efficiency of cotton was studied by pot experiment.[Result]Compared with the control of no N-life,the application of N-life could significantly improve the activities of superoxide dismutase,peroxidase,catalase,and nitrate reductase of cotton leaves,and reduce the malondialdehyde content significantly at the flowering and boll stages and boll opening stages,and increase the net photosynthetic rate in nitrogen reduction treatments.In the two-year pot experiments,N-life application significantly increased the nitrogen content and nitrogen use efficiency of cotton plants,and significantly reduced the nitrogen loss under the same nitrogen application level,also had an increasing effect on the total boll number of cotton plant,seed cotton yield and lint yield.In 2021 and 2022,the seed cotton yield increased by 12.80％-30.63％and 0.08％-5.96％,respectively,and the lint yield increased by 11.33％-34.25％and 0.31％-6.57％,respectively.In addition,the fiber upper half mean length and breaking strength were increased,and micronaire were improved,but N-life had no significant effect on the breaking elongation.[Conclusion]The application of N-life(1.5 kg per 667 m2)could improve the growth,development,and photosynthesis of cotton,enhance the nitrogen use efficiency of plants,and maintain high yield even at the condition of reducing nitrogen by 20％(pure nitrogen dosage of 15.2 kg per 667 m2).关键词
棉花/氮肥/氯啶/N-life/硝化抑制剂/产量/纤维品质Key words
cotton/nitrogen fertilizer/nitrapyrin/N-life/nitrification inhibitor/yield/fiber quality引用本文复制引用
马心雨,祝越熠,石钇琦,祝水金,赵天伦..新型氮肥增效剂N-life对棉花生理特性、氮肥利用率、产量和纤维品质的影响[J].棉花学报,2023,35(5):398-411,14.基金项目
海南省重点研发计划(SQ2021XDNY0696) （SQ2021XDNY0696）
