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    李妹娟, 张汇成, 唐颖, 等. 氮肥后移对稻鱼共生模式下水稻和禾花鲤鱼生长及田间水质环境的影响[J]. 华南农业大学学报, 2024, 45(0): 1-11. DOI: 10.7671/j.issn.1001-411X.2024060355
    引用本文: 李妹娟, 张汇成, 唐颖, 等. 氮肥后移对稻鱼共生模式下水稻和禾花鲤鱼生长及田间水质环境的影响[J]. 华南农业大学学报, 2024, 45(0): 1-11. DOI: 10.7671/j.issn.1001-411X.2024060355
    shu
    LI Meijuan, ZHANG Huicheng, TANG Ying, et al. Effects of postponingnitrogen application on rice and carp growth and paddy field water quality in rice-fish co-culture system[J]. Journal of South China Agricultural University, 2024, 45(0): 1-11. DOI: 10.7671/j.issn.1001-411X.2024060355
    Citation: LI Meijuan, ZHANG Huicheng, TANG Ying, et al. Effects of postponingnitrogen application on rice and carp growth and paddy field water quality in rice-fish co-culture system[J]. Journal of South China Agricultural University, 2024, 45(0): 1-11. DOI: 10.7671/j.issn.1001-411X.2024060355
    shu

    氮肥后移对稻鱼共生模式下水稻和禾花鲤鱼生长及田间水质环境的影响

    Effects of postponingnitrogen application on rice and carp growth and paddy field water quality in rice-fish co-culture system

      摘要
    • 摘要:
      目的 本研究旨在探究稻鱼共生模式下氮肥后移对水稻产量、稻米品质、氮肥利用率、田鱼存活率、田鱼产量、鱼肉品质以及稻田水质环境的影响，为该模式下稳定水稻产量和田鱼产量、提高氮肥利用效率提供理论依据。
      方法 以杂交稻‘泰丰优208’和常规稻‘19香’以及田鱼品种‘乳源石鲤1号’为试验材料，设计不施氮肥(M0)、一次性基施氮肥(M1，基肥和追肥质量比为10:0)和氮肥后移(M2，基肥和追肥质量比为7:3)共3个试验处理，施氮处理的总施氮量为早季150 kg·hm−2和晚季180 kg·hm−2。
      结果 与M1处理相比，M2处理的水稻茎蘖数、中后期叶片SPAD值和氮素吸收利用率(REN)提高。早、晚季M2处理的REN分别比M1处理相对提高25.82%~91.11%和62.74%~67.35%，两个施氮处理的稻米碾磨品质与外观品质无显著差异。M2处理显著增加了水稻穗分化始期的水体电导率、总氮、氨氮和硝氮含量(P < 0.05)，提高了早、晚季禾花鲤鱼单重和种植‘19香’稻田的田鱼年总产量，同时显著降低了鲤鱼肉粗脂肪含量(P < 0.05)。
      结论 稻鱼共生系统中氮肥后移可在稳定水稻和禾花鲤鱼产量的同时，提高水稻氮肥利用率，降低禾花鲤鱼粗脂肪含量，对稻米品质和鲤鱼肉蛋白质及总氨基酸含量无显著影响。

       

      Abstract:
      Objective This study aims to explore the effects of postponing nitrogen fertilization in the rice-fish co-culture system on rice yield and grain quality, nitrogen utilization rate, fish survival rate, fish yield, fish meat quality, as well as paddy field water quality. This research would provide a theoretical basis for stabilizing rice and fish yields and improving nitrogen utilization efficiency in rice fields under the rice-fish co-culture system.
      Method The study used ‘Taifengyou 208’, ‘19 Xiang’ and ‘Ruyuanshili 1’ as experimental materials. Based on a total nitrogen application rate of 150 kg·hm−2 for early season and 180 kg·hm−2 for late season, three experimental treatments were designed: No nitrogen fertilizer application (M0), one-time basal nitrogen fertilizer application (M1, the dosage ratio of basal fertilizer and top dressing fertilizer is 10:0), and postponing nitrogen application (M2, the dosage ratio of basal fertilizer and top dressing fertilizer is 7:3).
      Result Compared to the M1 treatment, postponing nitrogen application treatment (M2) was more beneficial for improving the rice tiller numbers, leaf SPAD values and nitrogen absorption and utilization efficiency (REN) at heading stage. The REN of M2 treatment increased 25.82%−91.11% and 62.74%−67.35% in early and late rice growing seasons respectively compared to M1. There was no significant difference in milling quality and appearance quality of rice between two nitrogen application treatments. M2 treatment significantly increased the paddy water conductivity content, total nitrogen, ammonia nitrogen, and nitrate nitrogen contents at rice panicle initial stage (P < 0.05), and increased the individual weight of carp in early and late seasons, as well as the annual fish yield in ‘19 Xiang’ rice fields, while significantly reduced the crude fat content in carp meat (P < 0.05).
      Conclusion In the rice-fish co-culture system, postponing nitrogen application (M2) can stabilize rice and carp yield, improve nitrogen use efficiency, and reduce crude fat content of carp meat, with no significant effect on rice quality or the protein and total amino acid contents of carp meat.

       

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