中国农业科学 ›› 2023, Vol. 56 ›› Issue (11): 2141-2157.doi: 10.3864/j.issn.0578-1752.2023.11.009

• 园艺 • 上一篇    下一篇

行距和灌水量对番茄冠层光截获和光合能力、物质积累及果实品质的影响

常佳悦1(), 马小龙1, 吴艳莉2, 李建明1()   

  1. 1 西北农林科技大学园艺学院,陕西杨凌 712100
    2 陕西省延安市黄陵县农业技术推广中心,陕西杨凌 712100
  • 收稿日期:2022-07-18 接受日期:2022-09-29 出版日期:2023-06-01 发布日期:2023-06-19
  • 通信作者: 李建明,E-mail:lijianming66@163.com
  • 联系方式: 常佳悦,E-mail:jiayue@nwafu.edu.cn。
  • 基金资助:
    陕西省技术创新引导专项(基金)(2021QFY08-04); 青海高原有机瓜菜生产关键技术研究与示范(2022ZY017)

Effects of Row Spacing and Irrigation Amount on Canopy Light Interception and Photosynthetic Capacity, Matter Accumulation and Fruit Quality of Tomato

CHANG JiaYue1(), MA XiaoLong1, WU YanLi2, LI JianMing1()   

  1. 1 School of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi
    2 Agricultural Technology Promotion Center, Huangling County, Yan’an City, Shaanxi Province, Yangling 712100, Shaanxi
  • Received:2022-07-18 Accepted:2022-09-29 Published:2023-06-01 Online:2023-06-19

摘要:

【目的】冠层内光合有效辐射和叶片光合生理特性存在较大异质性。探究番茄冠层不同部位叶片光截获和光合能力对行距和灌水量的响应,研究行距和灌水量对番茄冠层光合生产力的影响,并对果实综合品质进行分析,为机械化栽培番茄行距和灌水量的设置提供理论依据。【方法】以番茄为试材,宽窄行栽培,株距35 cm,小行距40 cm,设置3个大行距水平(70 cm(P1)、120 cm(P2)和170 cm(P3))和两个灌溉水平(常规灌溉(W1)和轻度亏缺灌溉(W2)),全因子试验,共6个处理,测定各叶位叶面积和光截获量,冠层均分为6个部位,测定叶片净光合速率(photosynthetic rate,Pn)、比叶质量(leaf mass per area,LMA)、叶绿素(Chlorophyll,Chl)及N、P、K含量,并分别以各部位叶面积占全株叶面积的比例或各部位叶片干重占全株叶片干重的比例为权重综合分析各处理冠层光合能力,通过Pearson相关系数分析各指标相关性,测定地上部干鲜重、单株产量及第二穗果品质,采用PCA法和基于博弈论的组合赋权-TOPSIS法对番茄综合品质进行评价并排序。【结果】行距增大对冠层叶面积、光截获和光合能力的影响主要体现在冠层中部和下部。冠层中部叶面积随行距增大表现为先增加后减少,冠层下部叶面积及冠层中部和下部光截获均表现为P1到P2显著增加,P2到P3小幅增加;冠层中部和下部Pn表现为P2较P1提高8.06%—11.32%,P3较P2提高14.25%—24.40%;LMA表现为P2较P1提高1.31%—33.24%,P3较P2提高6.09%—17.86%;Chl含量表现为P2较P1提高3.42%—6.81%,P3较P2提高3.19%—4.96%;N含量表现为P2较P1提高13.89%—34.73%,P3较P2提高2.21%—19.74%;P和K含量无明显规律。整体来看,Pn、Chl和N含量均随行距增大而增加,LMA轻度亏缺灌溉下随行距增大而增加,常规灌溉下表现为P3>P1>P2;3种行距水平下,LMA和N含量均表现为常规灌溉高于轻度亏缺灌溉,Pn表现为P1和P3下常规灌溉高于轻度亏缺灌溉,而P2下轻度亏缺灌溉更高,Chl含量表现为P1常规灌溉更高,而P2和P3轻度亏缺灌溉更高。地上部干鲜重,常规灌溉下随行距增大而增加,轻度亏缺灌溉下随行距增大而先增加后减少;常规灌溉的地上部干鲜重高于轻度亏缺灌溉。两种灌溉水平下单株产量均随行距增大而增加,P1到P2增加幅度较大(常规灌溉和轻度亏缺灌溉下,P2较P1分别增加33.75%和24.32%),P2到P3单株产量仅小幅增加(常规灌溉和轻度亏缺灌溉下,P3较P2分别增加2.87%和4.30%);常规灌溉单株产量高于轻度亏缺灌溉。增加行距、减少灌水量可以优化果实综合品质,综合品质得分前3位为P3W2、P2W2和P3W1。【结论】叶片Pn、LMA、N含量、地上部干鲜重和单株产量为P3W1最大;冠层光截获量、Chl含量及番茄综合品质评分为P3W2最高。

关键词: 番茄, 行距, 灌水量, 光截获, 光合能力, 物质积累, 综合品质

Abstract:

【Objective】Photosynthetically active radiation and photosynthetic physiological characteristics of leaves within the canopy were heterogeneous. The response to row spacing and irrigation amount of light interception and photosynthetic capacity of leaves in different parts of tomato canopy were explored in this study. The effects of row spacing and irrigation amount on photosynthetic productivity of tomato canopy were studied in detail, and the comprehensive quality of fruit was analyzed, which provided a theoretical basis for the setting of row spacing and irrigation amount in mechanized cultivation of tomato.【Method】Tomato, the test material, was cultivated in a wide and narrow row, with plant spacing of 35 cm. Small row spacing of 40 cm, and three large row spacing levels were set: 70 cm (P1), 120 cm (P2), and 170 cm (P3). Two irrigation levels were set: conventional irrigation (W1) and light deficit irrigation (W2). The experiment was a full factorial experiment with 6 treatments. The leaf area and light interception amount of each leaf position were measured. The canopy was divided into six parts, and the net photosynthetic rate (Pn), leaf mass per area (LMA), chlorophyll (Chl) and N, P, K content were measured. The canopy photosynthetic capacity under each treatment was comprehensively analyzed by taking the proportion of leaf area of each part to that of the whole plant or the proportion of leaf dry weight of each part to that of the whole plant as weights. The correlation of each index was analyzed by the Pearson correlation coefficient. The dry and fresh weight, yield per plant and fruit quality of the second ear were measured. The comprehensive quality of tomato was evaluated and ranked by PCA method and combined weighting-TOPSIS method based on game theory.【Result】The effects of increasing row spacing on canopy leaf area, light interception and photosynthetic capacity were mainly reflected in the middle and lower parts of the canopy. The leaf area in the mid canopy increased first and then decreased with the increase of the row spacing. The leaf area in the lower canopy and the light interception in the mid and lower canopy increased significantly from P1 to P2, but slightly increased from P2 to P3; the Pn in the mid and lower canopy showed that P2 increased by 8.06%-11.32% compared with P1, and P3 increased by 14.25%-24.40% compared with P2; the LMA showed that P2 increased by 1.31%-33.24% compared with P1, and P3 increased by 6.09%-17.86% compared with P2; the Chl content of P2 was 3.42%-6.81% higher than that of P1, and P3 was 3.19%-4.96% higher than that of P2; the N content of P2 was 13.89%-34.73% higher than that of P1, and P3 was 2.21%-19.74% higher than that of P2; the content of P and K had no obvious regularity. On the whole, the content of Pn, Chl and N increased with the increase of row spacing, and the LMA increased with the increase of row spacing under light deficit irrigation and showed P3>P1>P2 under conventional irrigation; under three row spacing levels, the LMA and N content under conventional irrigation were higher than those under light deficit irrigation, the Pn under conventional irrigation was higher than that under light deficit irrigation under P1 and P3, while the Pn under light deficiency irrigation was higher under P2; the Chl content under conventional irrigation was higher under P1, while the Chl content under light deficiency irrigation was higher under P2 and P3. With the increase of row spacing, the dry and fresh weight of the aboveground parts increased under conventional irrigation, and increased first and then decreased under light deficit irrigation; the aboveground dry and fresh weight of conventional irrigation was higher than that of light deficit irrigation. The yield per plant increased with the increase of row spacing under the two irrigation levels, and the increase from P1 to P2 was larger (compared with P1, P2 under conventional irrigation and light deficit irrigation increased by 33.75% and 24.32%, respectively.), while the yield per plant increased only slightly from P2 to P3 (compared with P2, P3 increased by 2.87% and 4.30% under conventional irrigation and light deficit irrigation, respectively.); the yield per plant under conventional irrigation was higher than that under light deficit irrigation. Increasing row spacing and reducing irrigation amount could optimize the comprehensive quality of fruit, and the top three comprehensive quality scores were P3W2, P2W2 and P3W1.【Conclusion】P3W1 was the highest in leaf Pn, LMA, N content, aboveground dry and fresh weight and yield per plant, and P3W2 was the highest in canopy light interception, Chl content and comprehensive quality score.

Key words: tomato, row spacing, irrigation amount, light interception, photosynthetic capacity, matter accumulation, comprehensive quality