scholarly journals Production of Pearl Millet Irrigated with Different Levels of Brackish Water and Organic Matter

2020 ◽  
Vol 51 (5) ◽  
pp. 701-709 ◽  
Author(s):  
Jaciele Beserra de Lira ◽  
Alberício Pereira de Andrade ◽  
André Luiz Rodrigues Magalhães ◽  
Fleming Sena Campos ◽  
Gherman Garcia Leal de Araújo ◽  
...  
Keyword(s):  
Organic Matter ◽  
Pearl Millet ◽  
Brackish Water ◽  
Different Levels

Influence of salinity and organic matter on the toxicity of Cu to a brackish water and marine clone of the red macroalga Ceramium tenuicorne

2011 ◽  
Vol 74 (4) ◽  
pp. 636-642 ◽  
Author(s):  
Erik Ytreberg ◽  
Jenny Karlsson ◽  
Kuria Ndungu ◽  
Martin Hassellöv ◽  
Eike Breitbarth ◽  
...  
Keyword(s):  
Organic Matter ◽  
Brackish Water ◽  
Red Macroalga

Evaluating membrane fouling potentials of dissolved organic matter in brackish water

2019 ◽  
Vol 149 ◽  
pp. 65-73 ◽  
Author(s):  
Sanghun Park ◽  
Taewoo Nam ◽  
Jeongyeop You ◽  
Eun-Sik Kim ◽  
Ilhwan Choi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Brackish Water ◽  
Membrane Fouling

scholarly journals Priming and substrate quality interactions in soil organic matter models

2013 ◽  
Vol 10 (3) ◽  
pp. 2089-2103 ◽  
Author(s):  
T. Wutzler ◽  
M. Reichstein
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Balance Model ◽  
Levels Of Abstraction ◽  
Substrate Quality ◽  
Substrate Limitation ◽  
Energy Limitation ◽  
Bare Fallow ◽  
Different Levels

Abstract. Interactions between different qualities of soil organic matter (SOM) affecting their turnover are rarely represented in models. In this study, we propose three mathematical strategies at different levels of abstraction to represent those interactions. By implementing these strategies into the Introductory Carbon Balance Model (ICBM) and applying them to several scenarios of litter input, we show that the different levels of abstraction are applicable at different timescales. We present a simple one-parameter equation of substrate limitation that can straightforwardly be implemented into other models of SOM dynamics at decadal timescale. The study demonstrates how substrate quality interactions can explain patterns of priming effects, accelerate turnover in FACE experiments, and the slowdown of decomposition in long-term bare fallow experiments as an effect of energy limitation of microbial biomass. The mechanisms of those interactions need to be further scrutinized empirically for a more complete understanding. Overall, substrate quality interactions contribute to both understanding and quantitatively modelling SOM dynamics.

scholarly journals Nutrient and inorganic solute (Na+ and Cl-) content in green onion plants under hydroponic cultivation using brackish water

2020 ◽  
Vol 44 ◽  
Author(s):  
Carlos Donato da Silva Souza ◽  
Geronimo Ferreira da Silva ◽  
Sirleide Maria de Menezes ◽  
José Edson Florentino de Morais ◽  
José Amilton Santos Júnior ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Brackish Water ◽  
Hydroponic System ◽  
Brackish Waters ◽  
Randomized Design ◽  
Hydroponic Cultivation ◽  
Salinity Levels ◽  
Completely Randomized Design ◽  
Harmful Effects ◽  
Different Levels

ABSTRACT Cultivation using brackish waters can result in nutritional and metabolic imbalances in several plant species, consequently reducing the production of dry matter (DM) and accumulation of toxic ions (Na+ and/or Cl-) in plants. We evaluated the DM production, and nutrient and inorganic solute (Na+ and Cl-) content in green onion plants (cv. Todo Ano Evergreen - Nebuka) under different levels of nutrient solution salinity in combination with circulation frequencies of this solution. Two experiments were conducted in a hydroponic system, using a completely randomized design, in a 6 × 2 factorial scheme, with five replicates: six levels of nutrient solution salinity (1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 dS m-1) and two solution circulation frequencies (twice and thrice a day). In Experiment I, the evapotranspired depth was replaced using brackish water that was used to prepare each of the salinity levels (used exclusively), whereas in Experiment II, brackish water was used only to prepare each of the salinity levels and public water was used (electrical conductivity [ECw] = 0.12 dS m-1) for replacement in all treatments. The increase in the nutrient solution salinity reduced the production of DM and accumulation of nutrients; the reductions were more pronounced when brackish waters were used exclusively (Experiment I). However, the circulation of solutions thrice a day resulted in the harmful effects of the salinity effect. Replacing the evapotranspirated blade with water supply (Experiment II) mitigated the deleterious effects of salinity. Moreover, three circulations of the nutrient solution daily resulted in lower accumulation of inorganic Na+ and Cl- solutes and increased accumulation of nutrients N, P, K+, Ca2+, Mg2+, and S in the culture.

scholarly journals Intake, digestibility, and ruminal parameters of Nellore bulls supplemented with increasing levels of crude glycerin in Brachiaria Brizantha pastures

2017 ◽  
Vol 18 (4) ◽  
pp. 518-529 ◽  
Author(s):  
Adriano Jorge Possamai ◽  
Joanis Tilemahos Zervoudakis ◽  
Luciana Keiko Hatamoto-Zervoudakis ◽  
Lucien Bissi da Freiria ◽  
Pedro Ivo José Lopes da Rosa Silva ◽  
...  
Keyword(s):  
Organic Matter ◽  
Latin Square ◽  
Serum Glucose ◽  
Nutrient Digestibility ◽  
Crude Glycerin ◽  
Brachiaria Brizantha ◽  
Mineral Mixture ◽  
Organic Matter Digestibility ◽  
Four Levels ◽  
Different Levels

SUMMARY We evaluated the effects of increasing levels of crude glycerin in multiple supplements for grazing beef cattle on intake, nutrient digestibility, pH, ruminal ammoniacal nitrogen, and serum glucose. Five Nellore steers (initial BW of 480 kg [SD 15]), grazing a tropical pasture, were used in a 5 × 5 Latin square design. The treatments used were control (no supplementation; only a mineral mixture ad libitum) and four levels of crude glycerin (0, 80, 160, 240 g/kg of supplements). Supplementation type had no impact (P > 0.05) on pH at 0 and 4 h after supplementation. Animals supplemented with different levels of crude glycerin showed higher N-NH3 values (P < 0.05) at 4 h after supplementation. Crude glycerin supplementation did not reduce pasture intake (P > 0.05), increasing dry matter intake (P > 0.05) due to increased organic matter digestibility (P > 0.05). Supplementation of 4 kg/animal with crude glycerin (240 g/kg supplement) did not reduce pasture intake and organic matter digestibility.

scholarly journals Pearl millet grain for beef cattle in crop-livestock integration system: intake and digestibility

2017 ◽  
Vol 38 (3) ◽  
pp. 1471 ◽  
Author(s):  
Marcell Patachi Alonso ◽  
Eduardo Henrique Bevitori Kling de Moraes ◽  
Dalton Henrique Pereira ◽  
Douglas Dos Santos Pina ◽  
Mircéia Angele Mombach ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Pearl Millet ◽  
Brachiaria Brizantha ◽  
Integration System ◽  
Genetic Groups ◽  
Protein Energy ◽  
Dietary Concentration ◽  
Maize Grain ◽  
Energy Supplements ◽  
Different Levels

The present study aimed to evaluate the nutritional parameters (intake and digestibility) of beef cattle in two genetic groups fed protein-energy supplements formulated by different levels of replacement of maize with pearl millet grain during the dry season. Sixty-four uncastrated young bulls, with an average age of 20 months and an initial body weight of 388 ± 26 kg, were included in the study. The experimental area consisted of four paddocks approximately 4.7 ha in size, composed of Brachiaria brizantha ‘Marandu’ within a crop-livestock integration system. The study was based on a completely randomized factorial design (2×4). Two genetic groups (Crossbred and Nellore) and the effects of replacement of maize with pearl millet grain at 0%, 33%, 66%, and 100% in the supplement formulations were assessed. No significant effects were observed in the genetic groups and with the replacement of maize with pearl millet grain, as well as in the pasture total dry matter (DM) and nutrients intake, or the coefficients of total digestibility of nutrients. The dietary concentration of digested organic matter was not influenced by the replacement levels of pearl millet grain, with values of 514.88, 515.76, 516.01, and 515.98 g kg-1 of DM recorded for the 0%, 33%, 66%, and 100% replacement levels, respectively. Therefore, pearl millet grain can be utilized as a partial or total substitute for maize grain as the energetic ingredient in concentrated supplements for Nellore and crossbred beef cattle in pastures managed in crop-livestock integration systems.

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