Abstract
Exopolysaccharide (EPS) produced by nitrogen-fixing bacteria Azotobacter protect nitrogenase from oxygen. In legume,EPS plays a role in the immobilization of rhizobia to the roots. The objective of this experiment was to study the effect of EPSAzotobacter and organic matter on increasing number of nodules and biomass of soybeans grown in Inceptisols and Ultisols;as well as nitrogen-fixing bacteria population in soybean rhizosphere. The experiment was set up in a completely randomizedblock design with five replications to test combined treatments of two doses of crude EPS and organic matter. Nodule number,shoot dry weight and nitrogen uptake, as well as Azotobacter and Rhizobium population in soybean grown in Inceptisolsfollowing crude EPS and compost application, were higher than those grown in Ultisols. The application of EPS and compostIn Ultisols did not affect the number of nodule and other traits, but in Inceptisols, adding 6.25 g of compost and 20 mL of EPSto each plant increased the number of nodules and shoot weight at 42 days after planting. However, the highest N uptake wasdemonstrated by soybean received 10 mL and 20 mL EPS along with 12.5 g compost.
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Claims 5
Claim · model-written summary
Nodule number, shoot dry weight and nitrogen uptake of soybean were higher in Inceptisols with EPS and compost than in Ultisols.
- Taxon
- soybean
Glycine maxe1 - Treatment
- crude EPS and compost applicatione1
- Outcome
- Nodule number,shoot dry weight and nitrogen uptakee1
- Direction
- highere1
- Comparator
- Ultisolse1
- Setting
- Inceptisolse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nodule number,shoot dry weight and nitrogen uptake, as well as Azotobacter and Rhizobium population in soybean grown in Inceptisolsfollowing crude EPS and compost application, were higher than those grown in Ultisols”
Claim · model-written summary
Azotobacter and Rhizobium populations in the soybean rhizosphere were higher in Inceptisols with EPS and compost than in Ultisols.
- Taxon
- soybeanGlycine maxe1
- Treatment
- crude EPS and compost applicatione1
- Outcome
- Azotobacter and Rhizobium populatione1
- Direction
- highere1
- Comparator
- Ultisolse1
- Setting
- Inceptisolse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nodule number,shoot dry weight and nitrogen uptake, as well as Azotobacter and Rhizobium population in soybean grown in Inceptisolsfollowing crude EPS and compost application, were higher than those grown in Ultisols”
Claim · model-written summary
EPS and compost application did not affect nodule number and other traits in Ultisols.
- Taxon
- soybeanGlycine maxe1
- Treatment
- application of EPS and composte2
- Outcome
- number of nodule and other traitse2
- Direction
- did not affecte2
- Setting
- Ultisolse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nodule number,shoot dry weight and nitrogen uptake, as well as Azotobacter and Rhizobium population in soybean grown in Inceptisolsfollowing crude EPS and compost application, were higher than those grown in Ultisols”
e2“The application of EPS and compostIn Ultisols did not affect the number of nodule and other traits”
Claim · model-written summary
In Inceptisols, 6.25 g of compost and 20 mL of EPS per plant increased nodule number and shoot weight at 42 days after planting.
- Taxon
- soybeanGlycine maxe1
- Treatment
- adding 6.25 g of compost and 20 mL of EPSe3
- Outcome
- number of nodules and shoot weighte3
- Direction
- increasede3
- Setting
- Inceptisolse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nodule number,shoot dry weight and nitrogen uptake, as well as Azotobacter and Rhizobium population in soybean grown in Inceptisolsfollowing crude EPS and compost application, were higher than those grown in Ultisols”
e3“in Inceptisols, adding 6.25 g of compost and 20 mL of EPSto each plant increased the number of nodules and shoot weight at 42 days after planting”
Claim · model-written summary
The highest N uptake of soybean was obtained with 10 mL and 20 mL EPS along with 12.5 g compost.
- Taxon
- soybeanGlycine maxe4
- Treatment
- 10 mL and 20 mL EPS along with 12.5 g composte4
- Outcome
- N uptakee4
- Direction
- higheste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nodule number,shoot dry weight and nitrogen uptake, as well as Azotobacter and Rhizobium population in soybean grown in Inceptisolsfollowing crude EPS and compost application, were higher than those grown in Ultisols”
e4“the highest N uptake wasdemonstrated by soybean received 10 mL and 20 mL EPS along with 12.5 g compost”
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