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应用生态学报 ›› 2021, Vol. 32 ›› Issue (4): 1433-1440.doi: 10.13287/j.1001-9332.202104.036

• 研究论文 • 上一篇    下一篇

氮肥减施与配施有机肥对冬小麦土壤线虫群落结构的影响

赵一1, 杨贝贝1, 朱新萍1*, 陈署晃3, 陈小云2, 贾宏涛1   

  1. 1新疆农业大学草业与环境科学学院, 乌鲁木齐 830052;
    2南京农业大学资源与环境科学学院, 南京 210095;
    3新疆农业科学院土壤肥料与农业节水研究所, 乌鲁木齐 830091
  • 收稿日期:2020-07-19 接受日期:2021-01-13 发布日期:2021-10-25
  • 通讯作者: *E-mail: zhuxinping1978@163.com
  • 作者简介:赵 一, 男, 1995年生, 硕士研究生。主要从事干旱区土壤生态过程与调控研究。E-mail: Zhaoyi_xjnd@163.com
  • 基金资助:
    国家重点研发计划项目(2018YFD0200406)和南京农业大学-新疆农业大学联合基金项目(KYYJ201702)资助

Effects of reduction of nitrogen fertilizer application and combined organic fertilizer on soil nematode community in winter wheat field.

ZHAO Yi1, YANG Bei-bei1, ZHU Xin-ping1*, CHEN Shu-huang3, CHEN Xiao-yun2, JIA Hong-tao1   

  1. 1College of Pratacultural and Environmental Sciences, Xinjiang Agricultural University, Urumqi 830052, China;
    2College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;
    3Research Institute of Soil, Fertilizer and Agricultural Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
  • Received:2020-07-19 Accepted:2021-01-13 Published:2021-10-25
  • Contact: *E-mail: zhuxinping1978@163.com
  • Supported by:
    National Key Research and Development Program of China (2018YFD0200406), and the Joint Fund Project of Nanjing Agricultural University and Xinjiang Agricultural University (KYYJ201702).

摘要: 土壤线虫是指示土壤健康的典型生物之一,为了揭示氮肥减施对土壤健康的影响,以冬小麦土壤为对象,研究了氮肥减施和配施有机肥对拔节期冬小麦土壤线虫群落结构的影响。共设置了6个施肥处理:CF(315 kg N·hm-2,常规施肥量)、N240(240 kg N·hm-2)、N210(210 kg N·hm-2)、N180(180 kg N·hm-2)、F150(180 kg N·hm-2+150 kg·hm-2黄腐酸)、F225(180 kg N·hm-2+225 kg·hm-2黄腐酸)。结果表明: 1)氮肥减施会降低土壤线虫数量,降幅为15.3%~68.5%;2)各处理均以原杆属为优势属(19.6%~50.4%)。氮肥减施提高了食真菌类、植食类和捕食/杂食类线虫的丰度,食细菌类线虫的丰度先降低后升高。配施有机肥后,食细菌类和食真菌类线虫的丰度降低,植食类和捕食/杂食类线虫丰度升高;3)N240和F225处理分别使线虫多样性指数H提高了48.1%和58.5%。N240处理线虫成熟度指数MI最高(1.95)。N180处理线虫结构指数SI最低(43.33),配施有机肥的F225线虫结构指数SI达到62.72,但线虫富集指数EI最低(80.82)。说明减施氮肥并配施有机肥可以提高土壤线虫的多样性,使食物网向复杂稳定方向发展,对农田土壤生态系统有积极意义。

关键词: 化肥减施, 土壤健康, 土壤线虫, 灰漠土

Abstract: Soil nematodes are one of the typical indicator organisms for soil health. To reveal the effects of reduction in nitrogen fertilizer application on soil health, we examined community structure of soil nematode under reduced nitrogen fertilizer while combined with organic fertilizer at the jointing stage of winter wheat. There were six fertilization treatments, including CF(315 kg N·hm-2, conventional fertilization), N240 (240 kg N·hm-2), N210 (210 kg N·hm-2)、N180 (180 kg N·hm-2), F150 (180 kg N·hm-2+150 kg·hm-2 fulvic acid), and F225(180 kg N·hm-2+225 kg·hm-2 fulvic acid). The results showed that: 1) The reduction of nitrogen fertilization decreased nematode number by 15.3%-68.5%. 2) Protorhabditis was the dominant genus (19.6%-50.4%) across all treatments. The reduction of nitrogen fertilizer application increased the abundance of fungivores, herbivores, and predators-omnivores, while that of bacterivores decreased first and then increased. Combined application of organic fertilizer decreased the abundance of bacterivores and fungivores, while increased that of herbivores and predators-omnivores. 3) N240 and F225 increased the Shannon diversity (H) of nematode community by 48.1% and 58.5%, respectively. The maturity index (MI) in N240 was the highest (1.95), while the structural index (SI) was the lowest in N180 (43.33). The structural index (SI) of F225 with combined application of organic fertilizer reached 62.72, but its enrichment index (EI) was lowest (80.82). In conclusion, reduced nitrogen fertilizer application and combined with organic fertilizer could improve soil nematode diversity, increase the complexity of soil food web, which would be conducive to the health and stability of agricultural ecosystem.

Key words: fertilizer application reduction, soil health, soil nematode, grey desert soil