中国农业科学 ›› 2025, Vol. 58 ›› Issue (19): 3872-3889.doi: 10.3864/j.issn.0578-1752.2025.19.006

• 耕作栽培·生理生化·农业信息技术 • 上一篇    下一篇

不同耕作方式下盐碱地玉米光合物质生产能力对有机肥用量的响应

李月琪1(), 麻仲花1, 苏明1, 刘昊1, 马风兰1, 马小英1, 李涛1, 李清云1, 张丹1, 刘吉利2, 吴娜1()   

  1. 1 宁夏大学农学院,银川 750021
    2 宁夏大学生态环境学院,银川 750021
  • 收稿日期:2025-03-21 接受日期:2025-08-01 出版日期:2025-10-01 发布日期:2025-10-10
  • 通信作者:
    吴娜,E-mail:
  • 联系方式: 李月琪,E-mail:lyqzakwx0101@163.com。
  • 基金资助:
    国家重点研发计划(2021YFD1900603); 宁夏重点研发计划(2019BFG02015)

Response of Maize Photosynthetic Production Capacity in Saline- Alkaline Soil to Organic Fertilizer Application Rates Under Differential Tillage Practices

LI YueQi1(), MA ZhongHua1, SU Ming1, LIU Hao1, MA FengLan1, MA XiaoYing1, LI Tao1, LI QingYun1, ZHANG Dan1, LIU JiLi2, WU Na1()   

  1. 1 College of Agriculture, Ningxia University, Yinchuan 750021
    2 College of Ecology and Environment, Ningxia University, Yinchuan 750021
  • Received:2025-03-21 Accepted:2025-08-01 Published:2025-10-01 Online:2025-10-10

摘要:

【目的】针对宁夏引黄灌区盐碱地土壤退化与作物生产力限制等问题,探讨垂直深旋耕配施有机肥对玉米(Zea mays L.)光合物质生产能力的影响,为该地区盐碱地玉米生产提供理论依据。【方法】于2021—2022年在宁夏平罗开展试验,以玉米品种先玉1225为试验材料,采用裂区试验设计,主区为耕作方式(DT,垂直深旋耕;TF,传统耕作),副区为有机肥用量(M0,不施肥;M1,0.75×104 kg·hm-2;M2,1.50×104 kg·hm-2;M3,2.25×104 kg·hm-2),于出苗后10、25、60、75、95、120 d测定各处理下玉米叶片光合参数、荧光参数、干物质积累、转运量以及成熟期玉米产量构成,分析不同耕作方式与有机肥用量互作下玉米光合物质生产相关指标的变化,探究耕作-施肥措施对盐碱地玉米干物质积累、转运特性的影响。【结果】(1)与传统耕作方式配施有机肥1.50×104 kg·hm-2相比,垂直深旋耕配施有机肥1.50×104 kg·hm-2能显著提高玉米的叶面积指数(LAI)和光合势(LAD)以及光合、荧光参数,叶片净光合速率(Pn)提高8.4%—35.0%,气孔导度(Gs)提高7.7%—19.8%,PS Ⅱ最大光化学效率(Fv/Fm)提高7.7%—17.1%,PS潜在最大光合能力(Fv/Fo)提高10.0%—30.3%。(2)垂直深旋耕配施有机肥1.50×104 kg·hm-2能显著提高干物质最大积累速率(Gmax)和平均积累速率(Gmean),并将达到最大干物质积累速率的时间(Tmax)和积累活跃期(D)控制在合理范围,同时提高花后干物质积累对籽粒的贡献率,对高产形成有利。(3)相关性分析和主成分分析表明,玉米产量和Gmean与LAD、PnGsFv/FmABS/RC呈显著或极显著正相关关系;同时,2种耕作方式下不同有机肥用量综合得分均呈现M2>M3>M1>M0。【结论】垂直深旋耕配施有机肥1.50×104 kg·hm-2能有效提高盐碱地玉米叶片的LAI和LAD,优化其光合、荧光特性,并有效改善干物质积累与转运特性,进而促进作物产量提升,该处理可作为宁夏引黄灌区盐碱地改良的推荐措施。

关键词: 玉米, 耕作方式, 有机肥用量, 光合荧光特性, 干物质积累转运特性, 产量

Abstract:

【Objective】Aiming at the problems of soil degradation and crop productivity limitation in saline-alkaline land in the Yinhuang Irrigation Area of Ningxia, this study aimed to investigate the effects of vertical deep rotary tillage with organic fertilizer on the production capacity of maize (Zea mays L.) in terms of photosynthesis material, so as to provide the theoretical basis for maize production in saline-alkaline land in the area.【Method】This study was conducted in Pingluo, Ningxia, China, in 2021-2022. The maize cultivar Xianyu 1225 was used as the test material, and a split-zone experimental design was adopted, with the main zone being the tillage method (DT, vertical deep rotary tillage; TF, conventional tillage), and the subzones being the organic fertilizer dosage (M0, no fertilization; M1, 0.75×104 kg·hm-2; M2, 1.50×104 kg·hm-2; M3, 2.25×104 kg·hm-2). The photosynthesis and fluorescence parameters of maize leaves, dry matter accumulation and transport as well as the composition of maize yields at the maturity stage were measured at 10, 25, 60, 75, 95, and 120 d after seedling emergence, and the changes in the indexes of maize photosynthetic material production in the presence of the interactions between different tillage and organic fertilizer were analyzed, and then the effects of the tillage-fertilizer measures on the dry matter production of maize in saline and alkaline land were investigated.【Result】(1) Compared with TF combined with M2, DT combined with M2 significantly increased the leaf area index (LAI) and photosynthetic potential (LAD), as well as photosynthetic and fluorescence parameters. Specifically, it enhanced: net photosynthetic rate (Pn) by 8.4%-35.0%, stomatal conductance (Gs) by 7.7%-19.8%, maximum photochemical efficiency of PSII (Fv/Fm) by 7.7%-17.1%, and potential maximum photosynthetic capacity of PSII (Fv/Fo) by 10.0%-30.3%. (2) DT combined with M2 significantly increased the maximum DMA rate (Gmax) and mean DMA rate (Gmean), while optimally controlling the time to reach Gmax (Tmax) and active duration of DMA (D). It also enhanced the contribution rate of post-anthesis DMA to grain yield, which was conducive to high yield formation. (3) Correlation and principal component analysis (PCA) revealed that maize yield and Gmean showed significant or highly significant positive correlations with LAD, Pn, Gs, Fv/Fm and ABS/RC. Furthermore, the comprehensive PCA scores for organic fertilizer rates under both tillage practices consistently ranked as M2>M3>M1>M0.【Conclusion】Vertical deep rotary tillage combined with organic fertilizer at 1.50×104 kg·hm-2 (DT+M2) effectively enhanced LAI and LAD in maize grown on saline-alkali soil, optimized its photosynthetic and fluorescence characteristics, and significantly improved dry matter accumulation and translocation traits, thereby promoting crop yield. This treatment was recommended as a saline-alkali soil improvement measure for the Ningxia Yellow River Irrigation District.

Key words: maize, tillage practices, organic fertilizer application rates, photosynthetic and fluorescence characteristics, dry matter accumulation and translocation characteristics, yield