scholarly journals Assessing the Effects of Digestates and Combinations of Digestates and Fertilizer on Yield and Nutrient Use of Brassica juncea (Kai Choy)

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 509
Author(s):  
Jacqueline Jamison ◽  
Samir Kumar Khanal ◽  
Nhu H. Nguyen ◽  
Jonathan L. Deenik
Keyword(s):  
Anaerobic Digestion ◽  
Plant Growth ◽  
Brassica Juncea ◽  
Nutrient Use Efficiency ◽  
Mineral Fertilizers ◽  
Negative Effects ◽  
Fertilizer Value ◽  
Greenhouse Study ◽  
Nutrient Use ◽  
Use Efficiency

Anaerobic digestion of organic wastes produces solid residues known as digestates, which have potential as a fertilizer and soil amendment. The majority of research on digestate focuses on their fertilizer value. However, there is a lack of information about additional effects they may have on plant growth, both positive and negative. Understanding the effects of digestate on plant growth is essential to optimizing their use in agriculture and helping close the loop of material and energy balances. This greenhouse study evaluated the effects of two different digestates, a food waste digestate (FWD) and a lignocellulosic biomass digestate (LBD); a liquid fertilizer; and various combinations of fertilizer and digestates on plant growth, nutrient uptake and nutrient use efficiency (NUE) of Brassica juncea (kai choy) plants. It also evaluated potential negative attributes of the digestates, including salinity and possible biohazards. Combinations of LBD and fertilizer performed as well or slightly better than the fertilizer control for most parameters, including aboveground biomass and root length. These same combinations had significantly higher nitrogen use efficiency than the fertilizer control. Inhibitory effects were observed in 100% LBD treatments, likely due to the high electrical conductivity of the media from digestate application. Based on this research, LBD could partially replace mineral fertilizers for kai choy at up to 50% of the target nitrogen rate and may lead to increased plant growth beyond mineral fertilizers. FWD could replace up to 100% of the target nitrogen application, without causing significant negative effects on plant growth. Increasing the use of digestates in agriculture will provide additional incentives for the anaerobic digestion process, as it produces two valuable products: biogas for energy and digestate for fertilizer.

Smart Fertilizer Strategy for Better Crop Production

2020 ◽  
Author(s):  
A. Karthik ◽  
M. Uma Maheswari
Keyword(s):  
Controlled Release ◽  
Plant Growth ◽  
Crop Yield ◽  
New Technologies ◽  
Nutrient Use Efficiency ◽  
Crop Productivity ◽  
Nano Particles ◽  
Nutrient Use ◽  
Use Efficiency ◽  
Controlled Release Fertilizers

Food security is one of the major concerns for all developing countries of the world. Even though we had attained the highest food production with the use of new technologies, we may not able to feed the burgeoning population adequately in coming years due to stagnant crop productivity. Natural source of nutrients like organic manures and external source of nutrients, viz. fertilizers, are considered as the two eyes in plant nutrient management. Nutrient use efficiency of fertilizer is very low due to numerous pathways of losses such as leaching, denitrification, microbial immobilization, fixation and runoff. It has been estimated that around 40-70% of nitrogen, 80-90% of phosphorus, 50-70% of potassium and more than 95% of micronutrient content of applied fertilizers are lost in to the environment and results in pollution (Kanjana, 2017). Smart fertilizers like slow and controlled release fertilizers, nanofertilizers and bioformulation fertilizers are the new technologies to enhance the nutrient use efficiency their by improving crop yield in sustainable manner. The use of slow and controlled release fertilizers increase nutrient use efficiency, minimize the risks like leaf burning, water contamination and eutrophication. Nano-fertilizers are the nano-particles-based fertilizers, where supply of the nutrients is made precisely for maximum plant growth, have higher use efficiency, exploiting plant unavailable nutrients in the rhizosphere and can be delivered on real time basis into the rhizosphere or by foliar spray (Priyanka Solangi et al., 2015). The small size, high specific surface area and reactivity of nano fertilizers increase the solubility, diffusion and availability of nutrients to plants and enhance crop productivity. Bioformulation is microbial preparations containing specific beneficial microorganisms which are capable of fixing or solubilizing or mobilizing plant nutrients for promoting plant growth and crop yield. Smart fertilizers are the better option for the farmers to increase their crop yield with low input cost in sustainable way without degrading natural environment.

scholarly journals Assessing Nutrient Use Efficiency and Environmental Pressure of Macronutrients in Biobased Mineral Fertilizers

2014 ◽  
pp. 137-180 ◽  
Author(s):  
Céline Vaneeckhaute ◽  
Greet Ghekiere ◽  
Evi Michels ◽  
Peter A. Vanrolleghem ◽  
Filip M.G. Tack ◽  
...  
Keyword(s):  
Nutrient Use Efficiency ◽  
Mineral Fertilizers ◽  
Environmental Pressure ◽  
Nutrient Use ◽  
Use Efficiency

scholarly journals Effect of Substrate Flow Rate on Nutrient Uptake and Use Efficiency in Hydroponically Grown Swiss Chard (Beta vulgaris L. ssp. cicla ‘Seiyou Shirokuki’)

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2050
Author(s):  
Bateer Baiyin ◽  
Kotaro Tagawa ◽  
Mina Yamada ◽  
Xinyan Wang ◽  
Satoshi Yamada ◽  
...  
Keyword(s):  
Plant Growth ◽  
Nutrient Uptake ◽  
Beta Vulgaris ◽  
Flow Rate ◽  
Growth Parameters ◽  
Nutrient Use Efficiency ◽  
Soil Culture ◽  
Nutrient Use ◽  
Swiss Chard ◽  
Use Efficiency

Unlike in soil culture, a substrate (nutrient solution) in a hydroponics system can flow, and this can affect both nutrient uptake and plant growth. In this study, we hydroponically cultivated Swiss chard (Beta vulgaris L. ssp. cicla) under different flow rates to analyze changes in the growth, nutrient uptake, and nutrient use efficiency. When the flow rate was intensified from 2 to 4 L/min, leaf area, the fresh weight, dry weight, and root length increased. However, when the flow rate was increased from 4 to 8 L/min, values of these growth parameters decreased. The nutrient uptake had a similar trend relative to the growth parameters and nutrient use efficiency of macronutrient elements, increased as the flow rate increased. This indicates that the flow rate affects plant growth by influencing the nutrient uptake, and an increase in the flow rate can aid in improving nutrient use efficiency. In hydroponics, regulating the flow rate at a reasonable volume is recommended to increase yield by enhancing nutrient use efficiency, but too intensive a flow rate may cause excessive physical stimulation to plants and inhibit their growth. Therefore, it is important to choose an appropriate substrate flow rate for optimal hydroponics production.

Bacterial impregnation of mineral fertilizers improves yield and nutrient use efficiency of wheat

2017 ◽  
Vol 97 (11) ◽  
pp. 3685-3690 ◽  
Author(s):  
Shakeel Ahmad ◽  
Muhammad Imran ◽  
Sabir Hussain ◽  
Sajid Mahmood ◽  
Azhar Hussain ◽  
...  
Keyword(s):  
Nutrient Use Efficiency ◽  
Mineral Fertilizers ◽  
Nutrient Use ◽  
Use Efficiency
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