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- Title
一次性减量施用控释肥对棉花群体冠层结构及产量构成的影响.
- Authors
郑曙峰; 徐道青; 陈敏; 刘小玲; 王维; 阚画春; 李淑英
- Abstract
The study aims to analyze the effects of one-off decreasing controlled-releasefertilizer and conventional fertilizer application on cotton canopy structure and yield components and study the effect of one-off decreasing controlled-release fertilizer applicationon fertilization reduction and efficiency improvement in the hope of providing a theoretical basis for the fertilization reduction and efficiency improvementtechnologies.【Method】 Multiple field trial was conducted, CI-110 and other instruments were used to study the parameters of cotton canopy structure, photosynthetic, yield and yield components under one-off decreasing controlled-release fertilizer and conventional fertilizer application with different amounts.【Result】 one-off decreasing controlled-release fertilizer application could keep the higher leaf area index in the primary and late stage of cotton, improve the light transmittance of the middle and lower layers, enhance the PAR interception ability, and reduce the penetration loss of PAR in communities, delay leaf senescence and the photosynthetic function decline in leaves. LAR of different treatments in full-bloom stage and early boll opening stage was very significantly correlated with bolls number, boll weight and the cotton yield, and very significantly correlated with boll rot in multi-boll stage. In this study, the treatment of one-off decreasing 25% N of controlled-release fertilizer application increased yield by 2.89% compared with one-off total controlled-release fertilizer application, increased yield by 5.53% than conventional fertilizer application, increased yield by 14.89% than decreasing conventional fertilizer application, and increased yield by 50.96% than no N fertilizer application.【Conclusion】 One-off decreasing controlled-release fertilizer application can build a reasonable cotton canopy structure, increase boll number per plant and yield, decrease nitrogen fertilizer consumption, and improve the nitrogen use efficiency. The test results suggest that one-off decreasing 25% N of controlled-release fertilizer application (225 kg/hm²) is most suitable for hybrid cotton in cotton area along Changjiang River in Anhui Province.
- Publication
Xinjiang Agricultural Sciences, 2020, Vol 57, Issue 11, p2012
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2020.11.007