Fertilizers

Displaying 1 - 7 of 7

Testing a Bovine Blood-Derived Compound as Iron Supply on Cucumis sativus L.

Submitted by Elsewhere on 2020-Sep-27 Sun 13:21
1564

A new powder formulation obtained from bovine blood (Fe-heme) was tested on cucumber (Cucumis sativus L.) to investigate its effectiveness as iron supply in comparison with two synthetic iron-chelates fertilizers: ethylenediaminetetraacetic acid (EDTA/Fe3+) and ethylenediamine-N’N’-bis(2-hydroxyphenyl acetic acid) (o,oEDDHA/Fe3+). Green stressed cucumber plants were evaluated in their recovery (SPAD index and weight variations) and to test the iron reduction capacity of the roots at pH 7.5 and 6.0 using each iron treatment as iron supply. The blood-derived product showed similar effects on decreasing iron-deficiency symptoms: SPAD increments and the weights of plants were similar. Noteworthy, the average of Fe3+ reduction capacity in roots was higher for EDTA/Fe3+, while it was similar for o,oEDDHA/Fe3+, and Fe-heme at pH 7.5. Fe-heme showed a complex behavior due to aggregation and low solubility at pH 6 and showed an unexpectedly high contribution of root exudates to iron reduction.

Effect of Bacterial Inoculum and Fertigation Management on Nursery and Field Production of Lettuce Plants

Submitted by Elsewhere on 2020-Sep-26 Sat 23:26
1558

Plant growth-promoting rhizobacteria have been applied to different vegetable crops but there is still no information on the effect of bacterial biostimulant application under variable nutritional level on lettuce seedlings and their performance after transplanting in the field. This study aimed to evaluate the efficacy of a bacterial biostimulant to enhance growth and quality of lettuce seedlings fertigated with increasing nutrient rates and to assess the efficacy of these treatments on lettuce head production. Lettuce seedlings were inoculated with 1.5 g L−1 of TNC BactorrS13 (a commercial biostimulant containing 1.3 × 108 CFU g−1 of Bacillus spp.) and fertigated with a nutrient solution containing 0, 1, 2, and 4 g L−1 of NPK fertilizer (20-20-20). At the end of transplant production, the plants were evaluated for greenhouse cultivation. The effect of fertigation rate on seedling height, dry biomass, dry matter percentage, and water use efficiency was evident up to 2 g L−1 of fertilizer in the non-inoculated seedlings, whereas fresh biomass and nitrogen use efficiency changed up to 4 g L−1 of fertilizer. The use of the bacterial biostimulant modified seedling growth and its response to nutrient availability. The inoculation of the substrate with Bacillus spp. promoted plant growth and allowed seedlings to reach the highest height and biomass accumulation.

How much nitrogen does spinach really need?

Submitted by Elsewhere on 2020-Sep-23 Wed 13:15
1505

How much nitrogen fertilizer does winter-grown, high tunnel spinach really need? Cornell vegetable specialists had heard of some producers applying up to 600 pounds per acre. Their research conducted with Northern New York Agricultural Development Program (NNYADP) grant funding suggests that growers in…

A Typological Concept to Predict the Nitrogen Release from Organic Fertilizers in Farming Systems

Submitted by Elsewhere on 2020-Sep-22 Tue 09:44
1453

The prediction of nitrogen (N) mineralization or immobilization in organic fertilizers is an important tool to optimize fertilizer use, especially in intensive agricultural systems. Our aim was to derive a model to predict the N mineralization/immobilization from readily available information on the properties of organic fertilizers in farming practice. On the basis of a literature review, a characterization of organic fertilizers was performed, revealing a large variance in fertilizer properties within the defined categories and subcategories. A partial linear model was derived and used for the prediction of N mineralization/immobilization based on the type of fertilizer and the carbon (C) to organic nitrogen (Norg) ratio. Depending on the previously defined category, a strong mineralization (e.g., plant- and animal-based commercial fertilizers) or a predominant immobilization (e.g., compost and slurries) was detected. For a total of seven main categories and their subcategories, individual models were developed. This work shows that the mineralization properties of organic fertilizers can be sufficiently predicted through a simple classification into a fertilizer category and through the C to Norg ratio.

Medium-Term Influence of Organic Fertilization on the Quality and Yield of a Celery Crop

Submitted by Elsewhere on 2020-Sep-18 Fri 00:35
1393

For some years now, part of society has been demanding the implementation of circular economy models and so the use of organic matter as a source of nutrients is once again taking center stage. In this scenario, the aim of this work was to implement an integrated management model for a farm and to study the influence on a celery crop of organic amendments (animal and vegetable) obtained on the farm, as opposed to inorganic fertilization. This influence was evaluated for the yield and the nutritional, organoleptic, and sanitary quality of the resulting crops. The yield and size of the marketable parts of the celery plants were greater with the inorganic treatment; however, the nutritional and sanitary quality was better in the organic treatments, while the chromatic attributes, as well as the total P and Ca, were not affected by the different fertilization treatments applied. It is therefore concluded that the organic management model is environmentally and economically sustainable.

'Microorganisms can be a great tool to achieve more efficient agriculture'

Submitted by Elsewhere on 2020-Aug-13 Thu 10:08
1030

A research project developed by Ideagro to reduce the application of fertilizers in agriculture through the contribution of microorganisms is obtaining important results in melon, tomato, broccoli, apricot, and citrus crops in an experimental farm located in the Murcian district of Yechar. The Minister…

Plant-based fertilizers on par with conventional fertilizers in lettuce

Submitted by Elsewhere on 2020-Aug-11 Tue 09:38
996

Growing lettuce on water Biota Nutri's 100% plant-based fertilisers gives the same yield and quality as using conventional fertilisers. This was shown by a series of tests conducted at the HAS University of Applied Sciences in 's-Hertogenbosch, the Netherlands. Left: conventional fertilizers; right:…