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Daylily intercropping: Effects on soil nutrients, enzyme activities, and microbial community structure
1Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia, China.
Frontiers in Plant Science
|March 9, 2023
Summary
Intercropping daylily with other crops enhances soil nutrients and microbial diversity. This sustainable agriculture practice boosts soil health and optimizes the root-soil microbial community composition and diversity.
Area of Science:
- Agricultural Science
- Soil Microbiology
- Horticulture
Background:
- Intercropping systems offer a pathway to optimize land use and promote sustainable agriculture.
- Daylily (Hemerocallis citrina Baroni) intercropping systems have potential in horticultural fields.
- Understanding the impact of intercropping on soil physicochemical properties and microbial communities is crucial for efficient agricultural practices.
Purpose of the Study:
- To explore the root-soil microbial community diversity in various daylily intercropping systems.
- To determine the effects of intercropping on soil physicochemical traits and enzymatic activities.
- To analyze the alterations in soil microbial community structure and composition under different intercropping patterns.
Main Methods:
- Employed high-throughput sequencing to analyze root-soil microbial community diversity.
- Investigated four daylily intercropping systems: watermelon/daylily (WD), cabbage/daylily (CD), kale/daylily (KD), and mixed intercropping (MI).
- Assessed soil physicochemical traits, enzymatic activities (urease, sucrase), and daylily yield compared to monocropping (CK).
Main Results:
- Intercropping significantly increased soil available potassium, phosphorus, nitrogen, and organic matter compared to monocropping.
- Urease and sucrase activities, along with daylily yield, were significantly higher in intercropping systems.
- Bacterial Shannon index increased in CD and KD systems; fungal Shannon index increased in MI. Microbial community composition varied significantly, with notable shifts in phyla like Bacteroidetes, Acidobacteria, and Chloroflexi.
Conclusions:
- Daylily intercropping with other crops substantially improves soil nutrient levels.
- Intercropping optimizes soil bacterial microflora composition and diversity, indicating enhanced soil health.
- The association between soil bacteria and soil parameters was stronger than that observed for fungi.

