中国农业科学 ›› 2025, Vol. 58 ›› Issue (10): 1917-1933.doi: 10.3864/j.issn.0578-1752.2025.10.005

• 耕作栽培·生理生化·农业信息技术 • 上一篇    下一篇

不同磷肥施用量对高寒地区覆膜蚕豆光合特性、产量和水分利用效率的影响

徐秋韵1(), 周伟迪1, 韩成龙2, 谷艳杰1()   

  1. 1 青海大学农牧学院,西宁 810016
    2 青海大学省部共建三江源生态与高原农牧业国家重点实验室,西宁 810016
  • 收稿日期:2024-11-01 接受日期:2025-03-31 出版日期:2025-05-16 发布日期:2025-05-21
  • 通信作者:
    谷艳杰,E-mail:
  • 联系方式: 徐秋韵,E-mail:xuqiuyun1996@163.com。
  • 基金资助:
    国家自然科学基金(31960625)

Effects of Different Phosphorus Fertilizer Application Rates on Photosynthetic Characteristics, Yield and Water Use Efficiency of Broad Bean Mulched in Alpine Region

XU QiuYun1(), ZHOU WeiDi1, HAN ChengLong2, GU YanJie1()   

  1. 1 College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016
    2 State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016
  • Received:2024-11-01 Accepted:2025-03-31 Published:2025-05-16 Online:2025-05-21

摘要:

【目的】探讨不同覆膜方式和磷水平对蚕豆光合特性、产量和水分利用效率的影响,为高寒地区蚕豆种植模式的选择和土壤养分管理提供数据支撑。【方法】于2020—2023年,在青海省东部以春蚕豆‘青海13号’为试验材料,采用随机区组试验设计,设置平作不覆膜(NMF)、全膜双垄沟播(DRM)、三垄全覆膜沟播(TRM)3种覆膜方式和3个磷水平(P0,不施肥;P1,9.1 kg P·hm-2;P2,18.2 kg P·hm-2),研究不同覆膜方式和磷水平对土壤水热条件、蚕豆光合特性、产量和水分利用效率的影响。【结果】(1)相较于NMF处理,DRM和TRM处理提高蚕豆生育期10 cm土层土壤平均温度16.1%—20.5%和16.7%—23.0%,同时也提高了0—2 m土层土壤含水量和储水量。(2)相较于NMF处理,DRM和TRM处理降低蚕豆开花结荚期叶片蒸腾速率、气孔导度、胞间CO2浓度、净光合速率和叶面积指数,并降低蚕豆籽粒产量、地上生物量和水分利用效率。NMF处理的年平均籽粒产量最高(2 273 kg·hm-2),其次是TRM处理(1 030 kg·hm-2)和DRM处理(943 kg·hm-2)。(3)施磷提高NMF和DRM处理蚕豆开花结荚期净光合速率、蒸腾速率、胞间CO2浓度、气孔导度和叶面积指数,并提高籽粒产量、地上生物量和水分利用效率,TRM处理的趋势则与之相反。(4)相关性分析表明,籽粒产量、地上生物量和水分利用效率,与净光合速率、蒸腾速率、胞间CO2浓度、气孔导度、叶面积指数呈极显著正相关关系,与生育期土壤平均温度呈极显著负相关关系。【结论】垄沟地膜覆盖(DRM和TRM)抑制蚕豆生长后期的生长,叶面积指数增长速率减慢,光合作用减弱,导致籽粒产量、地上生物量和水分利用效率降低。在本试验条件下,平作不覆膜配施18.2 kg P·hm-2磷肥显著增加光合面积,光合作用增强,从而提高蚕豆籽粒产量和水分利用效率,可作为提高高寒地区蚕豆生产力的有效措施。

关键词: 蚕豆, 覆膜, 磷水平, 光合作用, 产量

Abstract:

【Objective】 To investigate the effects of different mulching methods and phosphorus (P) fertilizer application levels on the photosynthetic characteristics, yield, and water use efficiency of broad bean, so as to provide data support for the selection of broad bean planting modes and soil nutrient management practices in alpine regions. 【Method】 Used spring broad bean 'Qinghai No.13' as experimental material, a field experiment was conducted to investigate the effects of different mulching methods and P fertilizer application levels on soil hydrothermal conditions, the photosynthetic characteristics of broad bean, yield, and water use efficiency in the eastern of Qinghai Province from 2020 to 2023. For plot setup, the random block design was used, and three mulching methods were set up, i.e. double ridges and furrows mulch (DRM), and three ridges and furrows mulch (TRM), and no mulch (NMF), with three P fertilizer application levels (P0, no fertilizer; P1, 9.10 kg P·hm-2; P2, 18.2 kg P·hm-2). 【Result】 (1) Compared with NMF, DRM and TRM treatments increased the daily mean soil temperature within the 10 cm soil layer by 16.1% to 20.5% and 16.7% to 23.0%, respectively, and also increased soil water content and storage in the 0-2 m soil layer of broad bean growing season. (2) Compared with NMF, DRM and TRM treatments decreased the leaf transpiration rate, stomatal conductance, intercellular CO2 concentration, net photosynthesis rate and leaf area index during the flowering and podding periods, and deceased grain yield, aboveground biomass, and water use efficiency of broad bean too. The highest mean annual grain yield was 2 273 kg·hm-2 under NMF treatment, followed by 1 030 kg·hm-2 under TRM and 943 kg·hm-2 under DRM. (3) P fertilizer application enhanced the net photosynthetic rate, transpiration rate, intercellular CO2 concentration, stomatal conductance, and leaf area index in the flowering and podding periods of broad bean under NMF and DRM treatments, but the trends under TRM treatment were reversed. (4) The correlation analysis indicated that the grain yield, aboveground biomass, and water use efficiency were significantly positive correlated with the net photosynthetic rate, transpiration rate, intercellular CO2 concentration, stomatal conductance, and leaf area index, and were significantly negative correlated with the daily mean soil temperature of the growing seasons. 【Conclusion】 Ridge-furrow plastic film mulching treatments (DRM and TRM) inhibited the growth of broad bean in later growth stages, slowed down the growth rate of leaf area index, reduced photosynthesis, which resulted in the decreased grain yield, aboveground biomass, and water use efficiency. Under the conditions of this experiment, no mulch with flat planting combined with 18.2 kg P·hm-2 phosphorus fertilizer significantly enhanced photosynthetic area and photosynthesis, thus increase the grain yield and water use efficiency of broad bean, which could be used as an effective practice to increase broad bean productivity in alpine region.

Key words: broad bean, film mulching, phosphorus levels, photosynthesis, yield