Abstract
One hundred and eight isolates of Rhizobium leguminosarum were screened for effectiveness for pea under controlled environments. Eight superior strains plus the commercially available pea inoculants, Nitragin 'C', Grip-Inotec, and Rhizogen were tested at Waldheim and Brooksby for effectiveness with Tipu and Trapper pea as host plants. The experiment was a RCBD, laid out as a split plot with the two pea varieties as main plot treatments and rhizobia! strain as the subplot treatments, replicated four times. At Waldheim total dry matter ranged from 2429 kg/ha for uninoculated Trapper to 4024 kg/ha for Tipu inoculated with strain 128C79. Grain yield ranged from 1046 kg/ha for Trapper inoculated with strain 175G3 to 1665 kg/ha for Tipu inoculated with strain 175G3. Total grain-N ranged from 33.7 kg/ha for uninoculated Tipu to 55.5 kg/ha for. Trapper inoculated with strain 128C56G. At this site, strain 175G3 appears to be a superior strain for Tipu but is the least effective strain tested for Trapper. At Brooks by, no significant differences due to strain or cultivar were observed. Values for total dry matter, grain yield, and total N were around 75 % of those values found at Waldheim. A survey to assess nodulation was carried out and all uninoculated pea were nodulated. This would indicate the presence of indigenous R. leguminosarum nodulating pea or possible cross contamination from adjacent plots. The below average yield and the absence of a yield response due to inoculation can largely be attributed to the extreme dry weather occurring at both sites. Nodulation of the uninoculated control has also reduced the effect of inoculation on yield.
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Claims 13
Claim · model-written summary
At Waldheim, Trapper without inoculation had 2429 kg/ha total dry matter.
Verbatim
e0“At Waldheim total dry matter ranged from 2429 kg/ha for uninoculated Trapper to 4024 kg/ha for Tipu inoculated with strain 128C79.”
Claim · model-written summary
At Waldheim, Tipu inoculated with strain 128C79 had 4024 kg/ha total dry matter.
Verbatim
e0“At Waldheim total dry matter ranged from 2429 kg/ha for uninoculated Trapper to 4024 kg/ha for Tipu inoculated with strain 128C79.”
Claim · model-written summary
At Waldheim, Trapper inoculated with strain 175G3 yielded 1046 kg/ha grain.
Verbatim
e0“Grain yield ranged from 1046 kg/ha for Trapper inoculated with strain 175G3 to 1665 kg/ha for Tipu inoculated with strain 175G3.”
Claim · model-written summary
At Waldheim, Tipu inoculated with strain 175G3 yielded 1665 kg/ha grain.
Verbatim
e0“Grain yield ranged from 1046 kg/ha for Trapper inoculated with strain 175G3 to 1665 kg/ha for Tipu inoculated with strain 175G3.”
Claim · model-written summary
At Waldheim, uninoculated Tipu had 33.7 kg/ha total grain nitrogen.
Verbatim
e0“Total grain-N ranged from 33.7 kg/ha for uninoculated Tipu to 55.5 kg/ha for. Trapper inoculated with strain 128C56G.”
Claim · model-written summary
At Waldheim, Trapper inoculated with strain 128C56G had 55.5 kg/ha total grain nitrogen.
Verbatim
e0“Total grain-N ranged from 33.7 kg/ha for uninoculated Tipu to 55.5 kg/ha for. Trapper inoculated with strain 128C56G.”
Claim · model-written summary
Strain 175G3 appeared superior for Tipu at Waldheim.
Verbatim
e0“At this site, strain 175G3 appears to be a superior strain for Tipu but is the least effective strain tested for Trapper.”
Claim · model-written summary
Strain 175G3 was least effective for Trapper at Waldheim.
Verbatim
e0“At this site, strain 175G3 appears to be a superior strain for Tipu but is the least effective strain tested for Trapper.”
Claim · model-written summary
At Brooksby, strain and cultivar did not produce significant differences.
Not reportedTaxon
Verbatim
e0“At Brooks by, no significant differences due to strain or cultivar were observed.”
Claim · model-written summary
At Brooksby, total dry matter, grain yield, and total nitrogen were about 75% of Waldheim values.
Not reportedTaxon
Verbatim
e0“Values for total dry matter, grain yield, and total N were around 75 % of those values found at Waldheim.”
Claim · model-written summary
All uninoculated pea were nodulated.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- uninoculatede0
- Outcome
- nodulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all uninoculated pea were nodulated.”
Claim · model-written summary
The authors attributed below average yield and absent inoculation yield response largely to extreme dry weather.
- Outcome
- below average yield and the absence of a yield responsee0
- Qualifier
- extreme dry weather occurring at both sitese0
Not reportedTaxon
Verbatim
e0“The below average yield and the absence of a yield response due to inoculation can largely be attributed to the extreme dry weather occurring at both sites.”
Claim · model-written summary
Nodulation of uninoculated controls reduced the inoculation effect on yield.
Not reportedTaxon
Verbatim
e0“Nodulation of the uninoculated control has also reduced the effect of inoculation on yield.”