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草业学报 ›› 2025, Vol. 34 ›› Issue (12): 195-205.DOI: 10.11686/cyxb2025094

• 研究论文 • 上一篇    

春季黑茎病和蚜虫复合发生对紫花苜蓿产量和饲用价值的影响

白美婷1(), 李应德2, 陈倩华3, 冯艳丽1, 冯海明4, 段廷玉2   

  1. 1.甘肃开放大学,甘肃 兰州 730030
    2.草种创新与草地农业生态系统全国重点实验室,农业农村部草牧业创新重点实验室,兰州大学草地农业教育部工程研究中心,兰州大学草地农业科技学院,甘肃 兰州 730020
    3.陕西建设技师学院,陕西 西安 710119
    4.酒泉开放大学,甘肃 酒泉 735000
  • 收稿日期:2025-03-21 修回日期:2025-04-21 出版日期:2025-12-20 发布日期:2025-10-20
  • 通讯作者: 白美婷
  • 作者简介:E-mail: 675132057@qq.com
    白美婷(1980-),女,陕西咸阳人,副教授,硕士。E-mail: 675132057@qq.com
  • 基金资助:
    2024年高校教师创新基金(2024A-223)

Effect of co-attack of spring black stem and leaf spot disease and aphids on the yield and forage value of alfalfa

Mei-ting BAI1(), Ying-de LI2, Qian-hua CHEN3, Yan-li FENG1, Hai-ming FENG4, Ting-yu DUAN2   

  1. 1.Gansu Open University,Lanzhou 730030,China
    2.State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems,Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture and Rural Affair,Engineering Research Center of Grassland Industry,Ministry of Education,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
    3.Shaanxi Construction Technology Institute,Xi’an 710119,China
    4.Jiuquan Open University,Jiuquan 735000,China
  • Received:2025-03-21 Revised:2025-04-21 Online:2025-12-20 Published:2025-10-20
  • Contact: Mei-ting BAI

摘要:

病虫害是限制紫花苜蓿生产的重要因素,春季黑茎病和豌豆蚜是我国苜蓿种植区广泛发生的病虫害,二者复合发生对产量和品质的影响如何尚不得知。本试验在兰州大学景泰草地农业观测研究站设置紫花苜蓿春季黑茎病、豌豆蚜、春季黑茎病+豌豆蚜复合发生、喷施高效氯氟氰菊酯溶液等处理,以田间自然生长为对照。研究发现病原菌处理和病虫复合发生处理的春季黑茎病发病率和病情指数分别为54.67%~82.67%和20.93%~40.93%,显著高于对照和药剂处理;相较于对照和药剂处理,病原菌和病虫复合发生下,紫花苜蓿产量降低20.87%和22.17%(P<0.05)。病虫害对苜蓿叶片营养元素、饲喂价值的影响大于其对茎秆、地上部全株相应指标的影响,尤其以病虫复合发生情况下影响更为显著。与对照相比,病原菌处理显著降低了苜蓿叶片钙和硫含量,显著增加了叶片钾含量(P<0.05);与药剂处理相比,病原菌、蚜虫及病虫复合发生苜蓿叶片蛋白含量均显著降低;病虫复合发生较对照具有更高的单糖含量,较病原菌处理,苜蓿叶片乙酸和乳酸的含量降低(P<0.05)。本研究为紫花苜蓿春季黑茎病和豌豆蚜损失评定提供了理论依据,为后续病虫害防治提供了理论指导。

关键词: 损失评价, 病虫害, 饲喂价值, 病虫害管理

Abstract:

Pests and diseases significantly constrain Medicago sativa (alfalfa) production. Spring black stem disease, caused by the fungal pathogen Phoma medicagonis and pea aphid (Acyrthosiphon pisum), is widespread in alfalfa-growing regions of China. However, the impact of the combined occurrence of this pathogen and the aphid on alfalfa yield and quality remains unclear. To address this knowledge gap, we conducted a field experiment at the Jingtai Field Scientific Observation and Research Station of Grassland Agro-Ecosystems, Lanzhou University. The treatments included spring black stem inoculation, pea aphid disease infestation, combined spring black stem disease inoculation and pea aphid infestation, and spraying with β-cyfluthrin solution. Naturally grown alfalfa served as the control. The results show that the incidence and disease index of spring black stem disease in the pathogen treatment and pathogen+aphid treatment groups reached 54.67%-82.67% and 20.93%-40.93%, respectively, significantly higher than those in the control and insecticide-protected groups. Compared with the control and insecticide groups, the pathogen treatment group and pathogen+aphid treatment group showed decreases in alfalfa yield (decreases of 20.87%-22.17%). Pests and diseases had a greater impact on the nutrient contents and feeding value of alfalfa leaves than on stems or the entire aboveground part, especially in the pathogen+aphid treatment group. Compared with the control, the pathogen treatment group showed significantly reduced calcium and sulfur contents in the leaves and significantly increased potassium content (P<0.05). The protein content in alfalfa leaves was significantly lower in the pathogen treatment group, aphid treatment group, and pathogen+aphid treatment group than in the insecticide group. The monosaccaride content in leaves was higher in the pathogen+aphid treatment group than in the control (P<0.05), and the acetic acid and lactic acid contents in alfalfa leaves were lower in the pathogen+aphid treatment group than in the pathogen-only treatment group (P<0.05). The results of this study provide a theoretical basis for assessing alfalfa crop losses caused by spring black stem disease and pea aphid, and offer theoretical guidance for the development and refinement of pest and disease control strategies.

Key words: loss evaluation, disease and insect pests, feeding value, disease and insect pests management