Abstract
The rhizosphere soil were obtained by five point sampling method from Italian ryegrass soil with different fertilities in Rongchang county of Chongqing city.Rhizosphere bacteria,fungi and actinomyces in samples from fertile and infertile soil were isolated and cultivated by the plate cultivation method with selective media.The results showed that the quantities of bacteria,fungi,actinomycetes and azotobacter,phosphobacteria,potassium-bacteria in fertile soil were more than in infertile soil.In soil of the same fertility,the quantity of bacteria was the largest,that of actinomyces the second,and that of fungi the least.In fertility soil,the quantity difference of bacteria and actinomycetes of different varieties of Italian ryegrass were larger than infertile soil,but the quantity of fungi was not.Among three PGPR bacteria,the quantity of phosphobacteria was the largest,that of azotobacter the second,and that of potassium-bacteria the least.To phosphobacteria,the quantity of organic phosphate bacteria was larger than inorganic phosphate bacteria.The Italian ryegrass varieties also influenced rhizosphere microbes'quantity.Bcteria and actinomyces'quantity of different Italian ryegrass had bigger difference,but the quantity of fungi had not significant difference.Fungi isolated from all Itanlian ryegrass rhizosphere soil belonged to eleven genera: Cladosporium,Penicillium,Fusarium,Rhizopus,Gliocladium,Sclerotium,Pythium,Pullularia,Periconia,Aspergillus,Alternaria.As the soil fertilities and varieties of Italian ryegrass were different,the population spatial and temporal distribution were different and their diversity index,richness index,evenness index and domination index were also different.
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Claims 9
Claim · model-written summary
Fertile ryegrass soil had more bacteria, fungi, actinomycetes and three nutrient-associated bacterial groups than infertile soil.
- Taxon
- Italian ryegrass
Lolium multiflorumt0 - Outcome
- quantities of bacteria,fungi,actinomycetes and azotobacter,phosphobacteria,potassium-bacteriae0
- Direction
- more thane0
- Comparator
- infertile soile0
- Setting
- fertile soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the quantities of bacteria,fungi,actinomycetes and azotobacter,phosphobacteria,potassium-bacteria in fertile soil were more than in infertile soil”
t0“Italian Ryegrass”
Claim · model-written summary
At a given fertility, bacteria were most abundant, actinomyces intermediate and fungi least abundant.
- Taxon
- Italian ryegrassLolium multiflorumt0
- Outcome
- quantity of bacteriae0
- Qualifier
- actinomyces the second,and that of fungi the leaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In soil of the same fertility,the quantity of bacteria was the largest,that of actinomyces the second,and that of fungi the least.”
t0“Italian Ryegrass”
Claim · model-written summary
Differences in bacterial and actinomycete quantities among ryegrass varieties were larger in fertile than infertile soil.
- Taxon
- Italian ryegrassLolium multiflorume0
- Outcome
- quantity difference of bacteria and actinomycetese0
- Direction
- larger thane0
- Comparator
- infertile soile0
- Setting
- fertility soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In fertility soil,the quantity difference of bacteria and actinomycetes of different varieties of Italian ryegrass were larger than infertile soil”
Claim · model-written summary
The variety-associated difference in fungal quantity was not larger in fertile soil.
- Taxon
- Italian ryegrassLolium multiflorume0
- Outcome
- quantity of fungie0
- Direction
- was note0
- Comparator
- infertile soile0
- Setting
- fertility soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In fertility soil,the quantity difference of bacteria and actinomycetes of different varieties of Italian ryegrass were larger than infertile soil,but the quantity of fungi was not.”
Claim · model-written summary
Among three PGPR groups, phosphobacteria were most abundant, azotobacter second and potassium bacteria least.
- Taxon
- Italian ryegrassLolium multiflorumt0
- Outcome
- quantity of phosphobacteriae0
- Qualifier
- azotobacter the second,and that of potassium-bacteria the leaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among three PGPR bacteria,the quantity of phosphobacteria was the largest,that of azotobacter the second,and that of potassium-bacteria the least.”
t0“Italian Ryegrass”
Claim · model-written summary
Organic phosphate bacteria outnumbered inorganic phosphate bacteria.
- Taxon
- Italian ryegrassLolium multiflorumt0
- Outcome
- quantity of organic phosphate bacteriae0
- Direction
- larger thane0
- Comparator
- inorganic phosphate bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To phosphobacteria,the quantity of organic phosphate bacteria was larger than inorganic phosphate bacteria.”
t0“Italian Ryegrass”
Claim · model-written summary
Ryegrass varieties differed in bacterial and actinomycete quantities, while fungal quantity did not differ significantly.
- Taxon
- Italian ryegrassLolium multiflorume0
- Material
- varietiese0
- Outcome
- Bcteria and actinomyces'quantitye0
- Direction
- bigger differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Italian ryegrass varieties also influenced rhizosphere microbes'quantity.Bcteria and actinomyces'quantity of different Italian ryegrass had bigger difference,but the quantity of fungi had not significant difference.”
Claim · model-written summary
Fungi from ryegrass rhizosphere soil belonged to eleven named genera.
Verbatim
e0“Fungi isolated from all Itanlian ryegrass rhizosphere soil belonged to eleven genera: Cladosporium,Penicillium,Fusarium,Rhizopus,Gliocladium,Sclerotium,Pythium,Pullularia,Periconia,Aspergillus,Alternaria.”
Claim · model-written summary
Microbial spatial and temporal distributions and four diversity indices varied with soil fertility and ryegrass variety.
- Taxon
- Italian ryegrassLolium multiflorume0
- Outcome
- population spatial and temporal distributione0
- Direction
- differente0
- Setting
- soil fertilitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the soil fertilities and varieties of Italian ryegrass were different,the population spatial and temporal distribution were different and their diversity index,richness index,evenness index and domination index were also different.”