Abstract
) production in arid and semiarid areas, and alternate irrigation in root areas has water-saving potential for alfalfa production. To investigate the impact of alternate partial root-zone irrigation (APRI) on the rhizosphere soil microorganisms of alfalfa, this study subjected alfalfa plants to different irrigation methods and irrigation levels. The growth status and rhizosphere soil microbial community diversity of alfalfa plants under alternate root-zone watering treatment were analyzed through laboratory experiments and high-throughput sequencing. The results showed that at soil moisture levels of 80% field moisture capacity (FMC) and 60% FMC, APRI had no significant impact on the biomass or nodule number of alfalfa. However, 40% FMC significantly reduced the individual plant dry weight, chlorophyll content, and nodule number of the alfalfa plants. APRI increased the relative abundance of Actinomycetes in the alfalfa rhizosphere soil. Moreover, at 60% FMC, the MBC and MBN of rhizosphere, relative abundance of Actinobacteria and unclassified K fungi and Chao 1 index of bacteria significantly increased under APRI treatment. While relative abundance of Ascomycetes and Proteobacteria in the alfalfa rhizosphere significantly reduced under 60% FMC + APRI treatment. In summary, under the same irrigation conditions, APRI did not significantly affect the growth of alfalfa in the short term. And 60%FMC + APRI treatment did significantly affect the groups, structure and diversity of the rhizosphere soil microbial communities.
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Claims 9
Claim · model-written summary
At 80% and 60% FMC, APRI did not significantly change alfalfa biomass or nodule number.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- APRIe1
- Outcome
- biomass or nodule numbere1
- Direction
- no_changeinferrede1
- Setting
- 80% field moisture capacity (FMC) and 60% FMCe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“at soil moisture levels of 80% field moisture capacity (FMC) and 60% FMC, APRI had no significant impact on the biomass or nodule number of alfalfa”
t0“alfalfa plants”
Claim · model-written summary
40% FMC significantly reduced individual plant dry weight, chlorophyll content and nodule number of alfalfa.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 40% FMCe2
- Outcome
- individual plant dry weight, chlorophyll content, and nodule numbere2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“40% FMC significantly reduced the individual plant dry weight, chlorophyll content, and nodule number of the alfalfa plants”
t0“alfalfa plants”
Claim · model-written summary
APRI increased the relative abundance of Actinomycetes in alfalfa rhizosphere soil.
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- rhizosphere soile3
- Treatment
- APRIe3
- Interactor
- ActinomycetesActinomycetese3symbiont
- Outcome
- relative abundance of Actinomycetese3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“APRI increased the relative abundance of Actinomycetes in the alfalfa rhizosphere soil”
t0“alfalfa plants”
Claim · model-written summary
At 60% FMC, APRI significantly increased MBC and MBN of the rhizosphere.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- APRI treatmente4
- Outcome
- MBC and MBN of rhizospheree4
- Direction
- increasede4
- Setting
- 60% FMCe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Moreover, at 60% FMC, the MBC and MBN of rhizosphere, relative abundance of Actinobacteria and unclassified K fungi and Chao 1 index of bacteria significantly increased under APRI treatment”
t0“alfalfa plants”
Claim · model-written summary
At 60% FMC, APRI significantly increased relative abundance of Actinobacteria and unclassified K fungi.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- APRI treatmente4
- Interactor
- ActinobacteriaActinomycetotae4symbiont
- Second interactor
- unclassified K fungie4symbiont
- Outcome
- relative abundance of Actinobacteria and unclassified K fungie4
- Direction
- increasede4
- Setting
- 60% FMCe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Moreover, at 60% FMC, the MBC and MBN of rhizosphere, relative abundance of Actinobacteria and unclassified K fungi and Chao 1 index of bacteria significantly increased under APRI treatment”
t0“alfalfa plants”
Claim · model-written summary
At 60% FMC, APRI significantly increased the Chao 1 index of bacteria.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- APRI treatmente4
- Outcome
- Chao 1 index of bacteriae4
- Direction
- increasede4
- Setting
- 60% FMCe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Moreover, at 60% FMC, the MBC and MBN of rhizosphere, relative abundance of Actinobacteria and unclassified K fungi and Chao 1 index of bacteria significantly increased under APRI treatment”
t0“alfalfa plants”
Claim · model-written summary
60% FMC with APRI significantly reduced relative abundance of Ascomycetes and Proteobacteria in alfalfa rhizosphere.
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- alfalfa rhizospheree5
- Treatment
- 60% FMC + APRI treatmente5
- Interactor
- Ascomycetese5symbiont
- Second interactor
- ProteobacteriaPseudomonadotae5symbiont
- Outcome
- relative abundance of Ascomycetes and Proteobacteriae5
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“While relative abundance of Ascomycetes and Proteobacteria in the alfalfa rhizosphere significantly reduced under 60% FMC + APRI treatment”
t0“alfalfa plants”
Claim · model-written summary
APRI did not significantly affect alfalfa growth in the short term.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- APRIe6
- Outcome
- growth of alfalfae6
- Direction
- no_changeinferrede6
- Qualifier
- in the short terme6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“In summary, under the same irrigation conditions, APRI did not significantly affect the growth of alfalfa in the short term”
t0“alfalfa plants”
Claim · model-written summary
60% FMC with APRI significantly affected the groups, structure and diversity of rhizosphere microbial communities.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 60%FMC + APRI treatmente7
- Outcome
- groups, structure and diversity of the rhizosphere soil microbial communitiese7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“60%FMC + APRI treatment did significantly affect the groups, structure and diversity of the rhizosphere soil microbial communities”
t0“alfalfa plants”
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