scholarly journals Growth, assimilate partitioning and grain yield response of soybean (Glycine max L. Merrrill) varieties to carbon dioxide enrichment and arbuscular mycorrhizal fungi in the humid rainforest

Agro-Science ◽  
2017 ◽  
Vol 15 (2) ◽  
pp. 29
Author(s):  
O.S. Sakariyawo ◽  
O.N. Adeyemi ◽  
M.O. Atayese ◽  
S.G. Aderibigbe
Keyword(s):  
Carbon Dioxide ◽  
Glycine Max ◽  
Arbuscular Mycorrhizal Fungi ◽  
Grain Yield ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Yield Response ◽  
Carbon Dioxide Enrichment ◽  
Assimilate Partitioning

scholarly journals Yield and Yield Attributes Responses of Soybean (Glycine max L. Merrill) to Elevated CO2 and Arbuscular Mycorrhizal Fungi Inoculation in the Humid Transitory Rainforest

2017 ◽  
Vol 9 (2) ◽  
pp. 233-241 ◽  
Author(s):  
Nurudeen ADEYEMI ◽  
Olalekan SAKARIYAWO ◽  
Muftau ATAYESE
Keyword(s):  
Glycine Max ◽  
Arbuscular Mycorrhizal Fungi ◽  
Grain Yield ◽  
Elevated Co2 ◽  
Mycorrhizal Fungi ◽  
Co2 Enrichment ◽  
Arbuscular Mycorrhizal ◽  
Yield Attributes ◽  
Glycine Max L ◽  
Amf Inoculation

Variations in yield components and grain yield of arbuscular mycorrhizal fungi (AMF) inoculated soybean varieties (Glycine max L. Merrill) grown in CO2 enriched environment in the humid rainforest were tested.  A screen house trial was established with soybean varieties (‘TGx 1448-2E’, ‘TGx 1440-1E’ and ‘TGx 1740-2F’), AMF inoculation (with and without) and CO2 enrichment (350±50 ppm and 550±50 ppm) in open top chamber, arranged in completely randomised design, replicated three times. A field trial was also conducted; the treatments were arranged in a split-split plot configuration fitted into randomised complete block design. In the main plot the variant was CO2 enrichment, the sub-plot consisted of AMF inoculation (with and without), while the sub-sub plot consisted of soybean varieties, replicated three times. Both trials had significantly higher grain yield at elevated CO2 than ambient. This could be attributed to improved yield attributes, more spore count and root colonisation. In both trials, inoculated soybean had significantly higher dry pod weight than un-inoculated, which could suggest the increased grain yield observed on the field. AMF inoculated soybean varieties outperformed un-inoculated in both CO2 enriched and ambient concentrations. AMF inoculated soybean variety ‘TGx 1740-2F’ is most preferable in CO2 enriched environment, while variety ‘TGx 1448-2E’ had the most stable grain yield in all growth environments. 

Yield response in chickpea cultivars and wheat following crop rotations affecting population densities of Pratylenchus thornei and arbuscular mycorrhizal fungi

2014 ◽  
Vol 65 (5) ◽  
pp. 428 ◽  
Author(s):  
R. A. Reen ◽  
J. P. Thompson ◽  
T. G. Clewett ◽  
J. G. Sheedy ◽  
K. L. Bell
Keyword(s):  
Grain Yield ◽  
Crop Rotation ◽  
Mycorrhizal Fungi ◽  
Soil Depth ◽  
Arbuscular Mycorrhizal ◽  
Yield Response ◽  
First Year ◽  
Pratylenchus Thornei ◽  
Tolerance Indices ◽  
Chickpea Cultivars

In Australia, root-lesion nematode (RLN; Pratylenchus thornei) significantly reduces chickpea and wheat yields. Yield losses from RLN have been determined through use of nematicide; however, nematicide does not control nematodes in Vertosol subsoils in Australia’s northern grains region. The alternative strategy of assessing yield response, by using crop rotation with resistant and susceptible crops to manipulate nematode populations, is poorly documented for chickpea. Our research tested the effectiveness of crop rotation and nematicide against P. thornei populations for assessing yield loss in chickpea. First-year field plots included canola, linseed, canaryseed, wheat and a fallow treatment, all with and without the nematicide aldicarb. The following year, aldicarb was reapplied and plots were re-cropped with four chickpea cultivars and one intolerant wheat cultivar. Highest P. thornei populations were after wheat, at 0.45–0.6 m soil depth. Aldicarb was effective to just 0.3 m for wheat and 0.45 m for other crops, and increased subsequent crop grain yield by only 6%. Canola, linseed and fallow treatments reduced P. thornei populations, but low mycorrhizal spore levels in the soil after canola and fallow treatments were associated with low chickpea yield. Canaryseed kept P. thornei populations low throughout the soil profile and maintained mycorrhizal spore densities, resulting in grain yield increases of up to 25% for chickpea cultivars and 55% for wheat when pre-cropped with canaryseed compared with wheat. Tolerance indices for chickpeas based on yield differences after paired wheat and canaryseed plots ranged from 80% for cv. Tyson to 95% for cv. Lasseter and this strategy is recommended for future use in assessing tolerance.

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