基于娃娃菜幼苗生长生理特性的微生物菌剂适宜用量筛选

Screening of suitable dosages of microbial agents based on the growth and physiological characteristics of baby Chinese cabbage seedlings

摘要

为了探究新型生物肥料微生物菌剂促进作物生长的效果，为其大面积推广应用提供基础，本研究选取7种不同微生物菌剂，通过比较不同浓度的菌剂对娃娃菜幼苗生长的影响，筛选苗期最适宜的菌剂施用浓度。结果显示，丛枝菌根真菌的高浓度T1C（基质用量10%）和T2C（基质用量10%）处理对促进幼苗生物量积累、光合能力增强和根系生长发育效果最优；中浓度的放线菌T3B（750倍液）和T4B（750倍液）处理显著改善幼苗生物量和根系形态；高浓度的EM菌T5C（50倍液）、哈茨木霉菌T6C（800倍液）和枯草芽孢杆菌T7C（800倍液）处理可促进幼苗生长、光合性能提高及根系发育。综上所述，施用中、高浓度的各微生物菌剂，可显著促进娃娃菜幼苗的生长。研究结果可为明确不同菌剂及其浓度在娃娃菜壮苗培育上的最佳施用方案提供科学依据。

Abstract

To investigate the growth-promoting effects of novel biofertilizer microbial agents on crops and provide a basis for their large-scale application, this study selected seven different microbial agents. By comparing the effects of different concentrations of these agents on the growth of baby Chinese cabbage seedlings, the most suitable application concentration at the seedling stage was determined. The results showed that the high concentration treatments of arbuscular mycorrhizal fungi [T1C and T2C（10% substrate dosage）] yielded the best effects on seedling biomass, photosynthetic capacity, and root development. The medium concentration treatments of actinomycetes [T3B and T4B（750-fold dilution）] significantly improved seedling biomass and root morphology. The high concentration treatments of EM bacteria [T5C（50-fold dilution）],Trichoderma harzianum [T6C（800-fold dilution）], Bacillus subtilis [T7C（800-fold dilution）] promoted seedling growth, photosynthesis, and root development. In summary, the application of medium and high concentrations of the tested microbial agents significantly promoted the growth of baby Chinese cabbage seedlings. These results provide an important references for determining the optimal application strategies of different microbial agents and their appropriate concentrations in the cultivation of baby Chinese cabbage seedlings.

关键词

娃娃菜 / 微生物菌剂 / 幼苗生长 / 壮苗

Key words

Baby Chinese cabbage / Microbial agent / Seedling growth / Strong seedlings

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基金资助

宝鸡市农业科技合作项目(2024BJNY-38)

西北农林科技大学科技推广项目(TGZX2025-18)

国家现代农业产业技术体系(CARS-23-G-22)