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草业学报 ›› 2025, Vol. 34 ›› Issue (8): 88-98.DOI: 10.11686/cyxb2024355

• 研究论文 • 上一篇    下一篇

“凹凸棒-有机基质”菌肥载体最佳配比的筛选及对紫花苜蓿的促生效果研究

李文秀1(), 姚拓1(), 李昌宁1, 贾倩民2, 何傲蕾1, 周杨3   

  1. 1.甘肃农业大学草业学院,甘肃 兰州 730070
    2.兰州大学草地农业科技学院,甘肃 兰州 730020
    3.甘肃杨柳青牧草饲料开发有限公司,甘肃 金昌 737205
  • 收稿日期:2024-09-23 修回日期:2024-10-28 出版日期:2025-08-20 发布日期:2025-06-16
  • 通讯作者: 姚拓
  • 作者简介:E-mail: yaotuo@gsau.edu.cn
    李文秀(1999-),女,甘肃天水人,在读硕士。E-mail: 2905666796@qq.com
  • 基金资助:
    甘肃农业大学科研启动经费(GAU-KYQD-2022-01);“有机肥-土壤-牧草”中的传播机制研究(GAU-KYQD-2022-01);基于科技小院的农业人才培养及草畜肥循环技术集成与示范资助

Screening of the best ratio of ‘attapulgite-organic matrix’ bacterial fertilizer carrier and its growth-promotion effect on alfalfa

Wen-xiu LI1(), Tuo YAO1(), Chang-ning LI1, Qian-min JIA2, Ao-lei HE1, Yang ZHOU3   

  1. 1.College of Pratacultural Science,Gansu Agricultural University,Lanzhou 730070,China
    2.College of Grassland Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
    3.Gansu Yangliuqing Forage Feed Development Co. ,LTD. ,Jinchang 737205,China
  • Received:2024-09-23 Revised:2024-10-28 Online:2025-08-20 Published:2025-06-16
  • Contact: Tuo YAO

摘要:

为了探究凹凸棒加有机基质作为菌肥载体的可行性以及制作菌肥时菌液的最佳添加量。本试验通过向有机基质中添加不同梯度凹凸棒(分别为5%、7.5%、10%)作为菌肥载体,然后向其中添加不同梯度菌液(分别为25%、27.5%、30%)制作成固体菌肥;通过测定菌肥货架期及紫花苜蓿盆栽试验验证菌肥促生效果,确定凹凸棒添加量以及菌液添加量。结果显示:菌肥保存180 d后,不同载体菌肥有效活菌数均大于2×108 cfu·g-1,杂菌数均小于3×106 cfu·g-1,其中5%凹凸棒加25%的菌液(F2+25%菌液)处理效果最好;7.5%凹凸棒加30%菌液(F3+30%菌液)处理下,紫花苜蓿结瘤数最多,为62.7个·盆-1,较对照提高了317.8%。5%凹凸棒加25%的菌液(F2+25%菌液)处理下,紫花苜蓿地上、地下生物量、叶绿素含量较对照分别提高了46.5%、86.2%和54.9%;总根长、总根表面积、根尖数和根分叉数较对照提高了87.7%、108.4%、96.2%和252.0%;通过隶属函数分析得出,5%凹凸棒加25%的菌液(F2+25%菌液)处理对紫花苜蓿促生效果最好。

关键词: 凹凸棒, 菌肥载体, 紫花苜蓿, 促生特性

Abstract:

This experiment explored the feasibility of attapulgite plus an organic matrix as a carrier of bacterial fertilizer and the optimal amount of bacterial liquid to be added when making bacterial fertilizer. Different amounts of attapulgite (5%, 7.5%, 10%; F1, F2 and F3, respectively) were added to an organic matrix as the carrier for bacterial fertilizer, and then different quantities of bacterial liquid (25%, 27.5%, 30%) were added to make solid bacterial fertilizer. The shelf life of bacterial fertilizer was evaluated and the growth-promotion effect of the bacterial fertilizer was verified by measuring plant traits of alfalfaMedicago sativa) in a pot experiment, for the various attapulgite and bacterial liquid addition treatments. It was found that 180 days after preparation, the effective viable count of all the different bacterial fertilizer carrier formulations was more than 2×108 cfu·g-1, and the number of miscellaneous bacteria was less than 3×106 cfu·g-1. The number of alfalfa nodules was the highest (62.7 per pot; 317.8% higher than control plants with no bacterial fertilizer added) under the treatment combination F3+30% bacterial liquid. The above-ground and below-ground biomass and chlorophyll content of alfalfa under the treatment comprising F2+25% bacterial liquid were increased by 46.5%, 86.2% and 54.9%, respectively, while the total root length, total root surface area, root tip number and root bifurcation number were increased by 87.7%, 108.4%, 96.2% and 252.0%, respectively, compared with the control plants. However, when data were analyzed by multivariate membership function, the treatment comprising F2+25% bacterial liquid was found to have the best effect on the growth of alfalfa.

Key words: attapulgite, bacterial fertilizer carrier, alfalfa, plant growth-promoting characteristics