Bradyrhizobium japonicum Mutants Allowing Improved Soybean Yield in Short Season Areas with Cool Spring Soil Temperatures

Crop Science ◽  
2002 ◽  
Vol 42 (4) ◽  
pp. 1186-1190 ◽  
Author(s):  
Hao Zhang ◽  
Fredric D'Aoust ◽  
Trevor C. Charles ◽  
Brian T. Driscoll ◽  
B. Prithiviraj ◽  
...  
Keyword(s):  
Bradyrhizobium Japonicum ◽  
Soybean Yield ◽  
Soil Temperatures ◽  
Short Season

Low Temperature–Tolerant Bradyrhizobium japonicum Strains Allowing Improved Soybean Yield in Short‐Season Areas

2002 ◽  
Vol 94 (4) ◽  
pp. 870-875 ◽  
Author(s):  
Hao Zhang ◽  
Trevor C. Charles ◽  
Brian T. Driscoll ◽  
Balakrishnan Prithiviraj ◽  
Donald L. Smith
Keyword(s):  
Low Temperature ◽  
Bradyrhizobium Japonicum ◽  
Soybean Yield ◽  
Short Season

Productivity enhancement of soybean as influenced by integerated nutrient and other agronomic interventions in sub - humid Punjab, India

2016 ◽  
Author(s):  
R. Sikka ◽  
D. Singh ◽  
J. S. Deol ◽  
J. Kaur
Keyword(s):  
Bradyrhizobium Japonicum ◽  
Maximum Yield ◽  
K Uptake ◽  
Maximum Enhancement ◽  
Available N ◽  
Soybean Yield ◽  
Hand Weeding ◽  
Control Application ◽  
Wheat Straw Mulch ◽  
Productivity Enhancement

A field experiment was conducted for three years under irrigated conditions for productivity enhancement of soybean through integrated nutrient and other agronomic interventions. Application of N, P, K and FYM significantly enhanced the yield of soybean over control. Maximum yield was observed in the treatment where FYM was applied with NPK and resulted in an increase of 15.1 per cent over NPK alone. Application of additional 30 kg N ha-1 at pre-flowering or at pod initiation did not significantly enhance the yield over the basal dose of NP applied at sowing. Application of 4 tonnes wheat straw mulch + 30 kg N +60 kg P2O5 and 30 kg N + 60 kg P2O5 ha-1 showed similar effect on seed yield of soybean. No statistical difference in soybean yield was obtained in the conventional flat and bed sowing treatments. Pre-emergence application of pendimethaline @ 1.5 l ha -1 along with one hand weeding at 40 days after sowing (DAS) and two hand weeding at 20 and 40 DAS were equally effective for weed control and in influencing the soybean yield. The application of N, P, K, FYM, in different treatments, treatment with Bradyrhizobium japonicum and sowing on beds all significantly improved the N, P and K uptake by soybean over control. Application of FYM to soybean resulted in maximum enhancement of nutrient uptake by soybean. After three years a significant improvement in soil OC, available N, P and K was observed in all treatments over control.

Path Analyses of Population Density Effects on Short-Season Soybean Yield

2001 ◽  
Vol 93 (1) ◽  
pp. 187-195 ◽  
Author(s):  
Rosalind A. Ball ◽  
Ronald W. McNew ◽  
Earl D. Vories ◽  
Terry C. Keisling ◽  
Larry C. Purcell
Keyword(s):  
Population Density ◽  
Soybean Yield ◽  
Density Effects ◽  
Path Analyses ◽  
Short Season

scholarly journals INFLUENCE OF MICROSYMBIONTS ON SOYBEAN YIELD

2012 ◽  
Vol 15 ◽  
pp. 29-39
Author(s):  
S.F. Abdurashytov
Keyword(s):  
Bradyrhizobium Japonicum ◽  
Soybean Yield ◽  
New Associations ◽  
Triple Symbiosis ◽  
Enhanced Yield

Seeds inoculation with preparations created on the basis of new associations of Glomus P3 and S7 and Rhizobofit has positively influenced formation of triple symbiosis and enhanced yield of soybean of «Annushka» variety in comparison with seeds inoculation with Bradyrhizobium japonicum only.

scholarly journals Common Ragweed (Ambrosia artemisiifolia L.) Causes Severe Yield Losses in Soybean and Impairs Bradyrhizobium japonicum Infection

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1616
Author(s):  
Rea Maria Hall ◽  
Bernhard Urban ◽  
Helmut Wagentristl ◽  
Gerhard Karrer ◽  
Anna Winter ◽  
...  
Keyword(s):  
Bradyrhizobium Japonicum ◽  
Yield Loss ◽  
Chemical Compounds ◽  
Ambrosia Artemisiifolia ◽  
Yield Losses ◽  
Management Options ◽  
Soybean Yield ◽  
Common Ragweed ◽  
Arable Fields ◽  
The Mean

Ambrosia artemisiifolia L. (Asteraceae), known as common ragweed, is an annual herbaceous species native to North America that has become one of the most economically important weeds in arable fields throughout Central Europe. Its large ecological amplitude enables the species to become established in several types of environments, and management options to effectively contain its spread are limited due to a lack of efficacy, high cost, or lack of awareness. In the last decade, in particular, soybean fields have been severely affected by common ragweed invasion. However, until now, information on the yield-decreasing effects of the plant has been scarce. Therefore, the aim of this study was to evaluate the competition effects of common ragweed on (1) soybean growth (aboveground/belowground), (2) the yield of two different soybean cultivars, and (3) the nodulation potential. Based on a greenhouse and biennial field trial, we found that in plots with the highest common ragweed biomass, the soybean yield loss accounted for 84% compared to the weed-free control, on average. The number of nodules, in addition to the mean nodule weight, which are tightly correlated with soybean yield, were significantly reduced by the presence of common ragweed. Just one common ragweed plant per square meter reduced the number of nodules by 56%, and consequently led to a decrease in yield of 18%. Although it has been reported that the genus Ambrosia produces and releases several types of secondary metabolites, little is known about the influence of these chemical compounds on soybean growth and nodulation. Thus, there is substantial need for research to understand the mechanisms behind the interaction between common ragweed and soybean, with a view to finding new approaches for improved common ragweed control, thereby protecting soybean and other crops against substantial yield losses.

scholarly journals Short‐season soybean yield and protein unresponsive to starter nitrogen fertilizer

2020 ◽  
Vol 112 (6) ◽  
pp. 5012-5023
Author(s):  
Navneet Brar ◽  
Yvonne Lawley
Keyword(s):  
Nitrogen Fertilizer ◽  
Soybean Yield ◽  
Short Season

Bradyrhizobium japonicum mutants allowing improved nodulation and nitrogen fixation of field-grown soybean in a short season area

2002 ◽  
Vol 138 (3) ◽  
pp. 293-300 ◽  
Author(s):  
H. ZHANG ◽  
F. DAOUST ◽  
T. C. CHARLES ◽  
B. T. DRISCOLL ◽  
B. PRITHIVIRAJ ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Total Nitrogen ◽  
Bradyrhizobium Japonicum ◽  
Dry Weight ◽  
Growth And Yield ◽  
Research Centre ◽  
Soybean Production ◽  
Nodule Number ◽  
Nitrogen Yield ◽  
Short Season

In short-season soybean production areas, low soil temperature is potentially a major factor limiting plant growth and yield. Although Bradyrhizobium japonicum strain 532 C is widely used in inoculants in Canadian soybean production, and USDA 110 is widely used in American soybean production, they are both inhibited by low temperatures. Genistein is an important plant-to-bacteria signal compound secreted by soybean roots. The addition of genistein has proven to be an effective means of generating increases in nitrogen fixation and yield but genistein is expensive. We used UV mutagenesis to make 10 mutants from USDA 110 that express nod genes without the addition of plant-to-bacteria signal compounds such as genistein. A field experiment was conducted at the Lods Agronomy Research Centre in southwestern Quebec in 1998 and 1999. The treatments consisted of factorial combinations of inoculant type (no inoculant (control) and inoculants containing the mutants Bj 30050, Bj 30051, Bj 30052, Bj 30053, Bj 30054, Bj 30055, Bj 30056, Bj 30057, Bj 30058, Bj 30059 and the wild type USDA110 or 532 C) and soybean cultivar (Bayfield and Maple Glen). The experiment was structured following a randomized complete block design with four blocks. Data were collected on nodule number, nodule dry weight, shoot nitrogen yield and total nitrogen fixation at five development stages. Averaged over the 2 years of the study, when pods were 2 cm long at one of the four uppermost nodes on the main stem (R4), inoculation with Bj 30055 and Bj 30058 resulted in greater nodule number (23 and 14%, respectively), nodule dry weight (16 and 13%, respectively), shoot nitrogen yield (19 and 21%, respectively) and total nitrogen fixation (10·9 and 12·7%, respectively) than 532 C, which is currently used in Canadian inoculants. The cultivar Bayfield produced more nodules, and higher nodule weight than Maple Glen, but there were no differences between the cultivars for shoot nitrogen yield and total nitrogen fixation.

scholarly journals Solarization for Weed Control in a Short-season Climate

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 429A-429
Author(s):  
Jo Ann Robbins ◽  
Carol Blackburn
Keyword(s):  
Weed Control ◽  
Control Method ◽  
Control Treatment ◽  
Community Garden ◽  
Green Beans ◽  
Weed Growth ◽  
Soil Temperatures ◽  
Clear Plastic ◽  
Short Season ◽  
Better Than

A solarization site was established on the grounds of the Sawtooth Community Garden south of Ketchum, Idaho, in 1995. Feasibility of solarization for weed control was determined in a region of sunny, warm days and cool nights. Elevation of the site was 1829 m, with a growing season of 90 days. Treatments of double and single layers of clear and IRT plastic were applied 23 May 1995. These solarization treatments were compared to hand-hoeing, glyphosate sprays, and no control. Highest soil temperatures were reached under the double clear plastic, where daily peak temperatures ranged from 19 to 46C. Plastic treatments were removed on 30 Aug. 1995. Weed growth and growth of peas, green beans, carrots, and beets were recorded during the summer of 1996. Weed growth on 14 June 1996 ranged from 0.3 to 0.8 weeds/m2 in the solarization, hand-hoe, and glyphosate treatments and was 22.4 weeds/m2 in the no control treatment. On 20 Aug., weeds/m2 ranged from 1.4 to 2.0 in the solarization, hand-hoe, and glyphosate treatments and was 20.4 weeds/m2 in the no control treatment. At both dates there was no significant differences between weed control treatments, and any weed control method was significantly better than no control. Weight per plant of beets and beans was no different across all treatments. Carrot and pea plants were smaller in the no control treatments, and some variable differences were noted between weed control treatments. Results indicate that solarization in short-season, cool climates will result in little to no advantage over hand-hoeing or herbicide control of weeds, and no subsequent differences in crop growth can be expected.

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