华南农业大学学报2024，Vol.45Issue(6)：846-855,10.DOI:10.7671/j.issn.1001-411X.202409001
稻鱼共作对不同留茬高度再生稻生长及产量的影响
Effects of rice-fish coculture on growth and yield of ratoon rice with different stubble heights
摘要
Abstract
[Objective]To investigate the effects of rice-fish coculture on growth and yield of ratoon rice with different stubble heights in the double rice cropping area of South China,and provide a scientific reference for rice cultivation and stubble management of the ratoon rice-fish coculture system.[Method]Using'YeXiangYouYouSi'as the ratoon rice variety for testing,a two-factor field experiment was conducted by setting rice cropping patterns(rice monoculture and rice-fish coculture)and stubble heights of the main season rice for ratoon rice(10 and 30 cm stubble heights),to explore the effects of rice-fish coculture on the growth characteristics and yield components of ratooning season rice with different stubble heights in the main season.[Result]Under the treatment of high stubble,the rice yield of the ratooning season was significantly higher in the rice-fish coculture than that in the rice monoculture,and the rice yield was significantly affected by the interaction of the rice cropping pattern and stubble height of the main season rice.Compared with those in the rice monoculture,the effective number of spikes and seed setting rate of the ratooning season rice in the rice-fish coculture significantly increased by 18.2%and 53.2%respectively,while the number of grains per spike significantly decreased by 17.9%,which indicated that the rice-fish coculture compensated for the insufficient number of grains per spike by improving the effective number of spikes and seed setting rate of ratooning season rice population,thus enhancing the yields.In addition,stubble height significantly affected the leaf nitrogen content at the heading stage of the ratooning season rice.During the maturity stage of the main season rice,there was a significant positive correlation between the zeatin riboside content of roots and the nitrogen content of leaves,suggesting that increasing the nitrogen content of leaves at maturity might be beneficial to increase the zeatin riboside content of roots and thus indirectly promote axillary bud germination.[Conclusion]Under the conditions of this experiment,the low stubble(10 cm)treatment was more appropriate for the ratoon rice monoculture system,while the high stubble(30 cm)treatment was suitable for the ratoon rice-fish coculture in the double rice cropping area of South China,which might be favorable to the subsequent growth and yield improvement of the ratooning season rice.关键词
稻鱼共作/再生稻/留茬高度/玉米素核苷/产量/生长特性Key words
Rice-fish coculture/Ratoon rice/Stubble height/Zeatin riboside/Yield/Growth characteristic分类
农业科技引用本文复制引用
韦生宝,陈宇婷,刘云,章家恩..稻鱼共作对不同留茬高度再生稻生长及产量的影响[J].华南农业大学学报,2024,45(6):846-855,10.基金项目
广东省重点领域研发计划(2021B0202030002) （2021B0202030002）
广东省现代农业产业技术体系创新团队建设项目(2022KJ105) （2022KJ105）
