scholarly journals Influence of biochar, mycorrhizal inoculation, and fertilizer rate on growth and flowering of Pelargonium (Pelargonium zonale L.) plants

2015 ◽  
Vol 6 ◽  
Author(s):  
Giulia Conversa ◽  
Anna Bonasia ◽  
Corrado Lazzizera ◽  
Antonio Elia
Keyword(s):  
Fertilizer Rate ◽  
Pelargonium Zonale ◽  
Mycorrhizal Inoculation

Evaluation of Zeolite-based Soilless Root Media for Potted Chrysanthemum Production

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 465e-465
Author(s):  
Janet L. Carlino ◽  
Kimberly A. Williams ◽  
Earl R. Allen
Keyword(s):  
Crop Production ◽  
Dry Mass ◽  
Nutrient Leaching ◽  
Fresh Mass ◽  
Production Cycle ◽  
Control Medium ◽  
Fertilizer Rate ◽  
Innovative Technologies ◽  
Root Media ◽  
Soluble Fertilizer

Chrysanthemum growth and nutrient leaching of three clinoptilolite-based root media, which were formulated and provided by Boulder Innovative Technologies, Inc. and ZeoponiX, Inc., were compared to the performance of control plants grown in Sunshine Mix #2 (3 peat: 1 perlite, v/v). The control received 210 mg·L–1 N from an 18N–4P–15K soluble fertilizer at each irrigation. The experimental zeolite-based medium NZ, which contained untreated zeolite and received the same soluble fertilizer as the control, leached lower concentrations of NH4-N, K, and PO4-P for most of the production cycle compared to the control. Medium EZ1 was formulated to provide N, P, and K as fertilizer nutrients and produced plants similar to the control based on ratings, height, width, and dry mass, but not fresh mass, at harvest when the fertilizer rate was half of that applied to the control, 105 mg·L–1 N. Medium EZ2, which did not receive P or K from soluble fertilizer, produced plants similar to the control based on rating, height, and dry mass, but not width or fresh mass, with soluble fertilizer input reduced to only N. Tissue N, P, and K concentrations of plants grown in media EZ1 and EZ2 were lower than those of control plants. With further refinements, these zeolite-based products show promise for decreasing nutrient leaching during crop production and allowing for application of lower rates of soluble fertilizers.

scholarly journals First Insights into the Effect of Mycorrhizae on the Expression of Pathogen Effectors during the Infection of Grapevine with Plasmopara viticola

2021 ◽  
Vol 13 (3) ◽  
pp. 1226
Author(s):  
Ana Cruz-Silva ◽  
Andreia Figueiredo ◽  
Mónica Sebastiana
Keyword(s):  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Plasmopara Viticola ◽  
Vitis Vinifera L ◽  
Wine Production ◽  
Grapevine Downy Mildew ◽  
Pathogen Effectors ◽  
Rxlr Effectors ◽  
Mycorrhizal Inoculation ◽  
And Control

Grapevine (Vitis vinifera L.), widely used for berry and wine production, is highly susceptible to the pathogenic oomycete Plasmopara viticola, the etiological agent of grapevine downy mildew disease. The method commonly used to prevent and control P. viticola infection relies on multiple applications of chemical fungicides. However, with European Union goals to lower the usage of such chemicals in viticulture there is a need to develop new and more sustainable strategies. The use of beneficial microorganisms with biocontrol capabilities, such as the arbuscular mycorrhizal fungi (AMF), has been pointed out as a viable alternative. With this study, we intended to investigate the effect of AMF colonization on the expression of P. viticola effectors during infection of grapevine. Grapevine plants were inoculated with the AMF Rhizophagus irregularis and, after mycorrhizae development, plants were infected with P. viticola. The expression of P. viticola RxLR effectors was analyzed by real-time PCR (qPCR) during the first hours of interaction. Results show that pre-mycorrhizal inoculation of grapevine alters the expression of several P. viticola effectors; namely, PvRxLR28, which presented decreased expression in mycorrhizal plants at the two time points post-infection tested. These results suggest that the pre-inoculation of grapevine with AMF could interfere with the pathogen’s ability to infect grapevine by modulation of pathogenicity effectors expression, supporting the hypothesis that AMF can be used to increase plant resistance to pathogens and promote more sustainable agriculture practices, particularly in viticulture.

Growth and metabolism of onion seedlings as affected by the application of humic substances, mycorrhizal inoculation and elevated CO2

2014 ◽  
Vol 180 ◽  
pp. 227-235 ◽  
Author(s):  
Marcelle M. Bettoni ◽  
Átila F. Mogor ◽  
Volnei Pauletti ◽  
Nieves Goicoechea
Keyword(s):  
Humic Substances ◽  
Elevated Co2 ◽  
Mycorrhizal Inoculation

Assessment of the Effects of Environmental Factors on the Response of Wheat to Fertilizer in On-farm Trials in a Mediterranean Type Environment

1996 ◽  
Vol 32 (3) ◽  
pp. 339-349 ◽  
Author(s):  
M. Pala ◽  
A. Matar ◽  
A. Mazid
Keyword(s):  
Seasonal Rainfall ◽  
Fertilizer Treatment ◽  
Regression Equations ◽  
Strongly Correlated ◽  
Soil Mineral ◽  
Wheat Grain ◽  
Soil Mineral Nitrogen ◽  
Fertilizer Rate ◽  
On Farm ◽  
Fertilizer Rates

SUMMARYA series of researcher-managed wheat fertilizer trials was conducted on representative farmers' fields across northwest Syria between 1986 and 1990. Wheat grain and straw yields were strongly correlated with seasonal (October-May) rainfall, almost irrespective of soil fertility, crop sequence or fertilizer rate, with a highly significant response to nitrogen fertilizer which increased with increasing rainfall and decreasing initial soil mineral-nitrogen values. These results were summarized in regression equations which express yield in terms of fertilizer rates, seasonal rainfall and their interactions. The equations with applied nitrogen and seasonal rainfall were the most appropriate for determining fertilizer needs. Economic analysis indicated that all fertilizer treatment rates were profitable under existing price conditions and that fertilizer use would still be beneficial for a nitrogen price up to three times higher than that of the price of grain (weight for weight) with a seasonal rainfall of 250 mm, and up to six times higher with a seasonal rainfall of 450 mm.

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