scholarly journals 818 PB 237 USE OF BIOSOLIDS FOR SOD PRODUCTION

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 550e-550
Author(s):  
Mouna Benmbarek ◽  
Y. Desiardins ◽  
R.R. Simard
Keyword(s):  
Water Retention ◽  
Sandy Loam ◽  
Seedling Emergence ◽  
Kentucky Bluegrass ◽  
Application Rate ◽  
Water Retention Capacity ◽  
Municipal Solid Wastes ◽  
Retention Capacity ◽  
The Subject ◽  
Sod Production

Landfiling and incineration constitute the most commonly used methods of biosolid disposal. To minimize the environmental risk, their chemical and biological characteristics have been the subject of several investigations. The present research was undertaken to evaluate the agronomic value of municipal solid wastes (MSW) and composted de-inked sludge (CDS) in a field experiment for sod production. Four variables in a split factorial design, were investigated at two sod farms: compost (MSW and CDS), soil (sandy loam and clay loam), application method (surface applied 6cm and incorporated 20cm), and the application rate (50-100 and 150t/ha). Controls consisted of unfertilized and unamended but fertilized plots. Both experimental sites were seeded with kentucky bluegrass. Preliminary data indicate that the two biosolids promoted the sod growth at the rates applied. However, a better plot cover was observed if composts were rototilled at a depth of 6cm as compared to the conventional treated plots. Measurements of root and foliar weights revealed that the turf growth was enhanced with increasing rates, which is probably caused by additional soil macronutrients showed by the analysis. Seed germination and seedling emergence were not delayed as indicated by the observed increase in the water retention capacity of the soil especially at higher compost rates.

scholarly journals Tropical forest refuge in peripheral soils of slags in Caatinga

2018 ◽  
Author(s):  
José João Lelis Leal de Souza ◽  
Bartolomeu Israel de Souza ◽  
Rubens Teixeira de Queiroz ◽  
Rony Lopes Lunguinho ◽  
Joseilson Ramos de Medeiros ◽  
...  
Keyword(s):  
Water Retention ◽  
Sandy Loam ◽  
Floristic Composition ◽  
Climatic Conditions ◽  
Water Retention Capacity ◽  
Organic Carbon Content ◽  
Retention Capacity ◽  
Composition And Structure ◽  
Forest Refuge ◽  
Peripheral Areas

AbstractThe influence of environmental factors on the structure and composition of plant communities in the Caatinga is complex and poorly explored. Spatial variation of biodiversity in Caatinga is poorly know and strictly attributed to climatic conditions. We investigated the influence of slags on floristic composition and structure of a shrubby-arboreal community in one of the driest region in Brazil. Chemical and physical analyses of soils were performed in samples of seven plots from savannic formations and from forest formations. Vegetation was characterized floristically and structurally in all plots. Habitats were structurally distinct, and diversity differed between peripheral and non-peripheral areas of slags. Nine of the ninety-seven species identified are reported to (sub)humid biomes. Soils are dominantly shallow, eutrophic and sandy loam. However, soils in the periphery of slags are more developed once paludization, melanization and bioturbation were verified. Our results suggest that soil fertility did not influence vegetable cover in Caatinga. The cover of plant species considered exclusive of (sub)humid biomes in Brazil extends beyond highlands in the semiarid, associated with high soil organic carbon content and water retention capacity of more developed soils than the typical of the Caatinga.

scholarly journals Synthesis of Biodegradable Aloevera-acrylic Acid Based Hydrogel With Enhanced Water Retention Capacity and Its Impact on Agriculture 

2021 ◽  
Author(s):  
suruchi sharma ◽  
Vaneet Kumar
Keyword(s):  
Acrylic Acid ◽  
Water Retention ◽  
Sandy Loam ◽  
Vinyl Monomer ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Soil Burial ◽  
Natural Polysaccharide ◽  
Biodegradable Hydrogel ◽  
Loam Soil

Abstract The present work deals with the synthesis of biodegradable hydrogel using a natural polysaccharide Aloevera and vinyl monomer acrylic acid. In this synthesis, ammonium per sulphate was used as an initiator and glutaraldehyde as cross-linker, acrylic acid was used as monomers and Aloevera as backbone. Grafting was confirmed by different techniques like SEM, FT-IR, XRD and EDS. Maximum percentage swelling of synthesized hydrogel was found to be 796 %. Biodegradation behavior of Av-cl-poly(AA) was studied by soil burial, compositing and vermicompositing method. Maximum biodegradation was found to be 90%, 94% and 93% in case of soil burial, composting and vermicomposting methods, respectively. Biodegradation of Av-cl-poly(AA) was confirmed by FTIR and SEM techniques. Water retention capacity was prolonged from 11days to 20 days using synthesized Av-cl-poly(AA). Water content of clay soil and sandy loam soil was increased to an extent of 6.1% and 5.79%, respectively.

scholarly journals INFLUENCE OF BAUSTAB STABILIZING ADDITIVE ON CHANGES IN SOIL WATER RETENTION CAPACITY

2020 ◽  
pp. 8-17
Author(s):  
A. Trautvain ◽  
A. Manokhin
Keyword(s):  
Water Retention ◽  
Sandy Loam ◽  
Road Construction ◽  
Water Retention Capacity ◽  
Soil Water Retention ◽  
Retention Capacity ◽  
Water Separation ◽  
Low Humidity ◽  
Water Saturated ◽  
Modified Soil

Clay soils are the most common in the Russian Federation; they have high connectivity and strength in the dry state and low strength in the water-saturated condition. To successfully use such soils in road construction, it is necessary to change their natural properties. For these purposes, a fairly large group of additives is used – organic and inorganic-based soil stabilizers, as well as various polymer modifiers. The paper investigates the influence of the Baustab stabilizing additive ((manufactured by NPP ZIPo LLC) on the change in humidity, water-holding capacity of waterlogged soil, as well as the change in the maximum density and optimal humidity of modified soil on the example of light sandy loam. It has been found that the use of additive has little effect on changes in soil moisture over time. Despite this, the soil with Baustab additive acquires a dense texture, becomes more viscous, partially aggregates and water separation is not observed. A study of the water retention capacity from the percentage of stabilizing additives Baustab shows an increase in this indicator compared to the soil without additives in the range from 3 to 7%. In addition, the use of additives in the composition of the soil contributed to the production of a system with high compaction and mobility even at low humidity of the modified soil. The influence of the water component on the compaction of the modified soil is also insignificant. Such soil is likely to be subject to minimal subsidence and loss of strength characteristics in the autumn-spring period.

scholarly journals Chemical Composition and Functional Properties of Dietary Fibre Concentrates from Winemaking By-Products: Skins, Stems and Lees

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1510
Author(s):  
María Ángeles Rivas ◽  
Rocío Casquete ◽  
María de Guía Córdoba ◽  
Santiago Ruíz-Moyano ◽  
María José Benito ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Functional Properties ◽  
Dietary Fibre ◽  
Water Retention ◽  
Point Of View ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Oil Retention ◽  
High Antioxidant Activity ◽  
By Products

The objective of this study was to evaluate, from a technological and nutritional point of view, the chemical composition and functional properties of the industrial winemaking by-products, namely skins, stems and lees. The chemical and physical characteristics, as well as the functional properties (fat and water retention and swelling capacity, antioxidant capacity, and their prebiotic effect), of the dietary fibre of these by-products were studied. The results showed that the skins, stems, and lees are rich in fibre, with the stem fibre containing the highest amounts of non-extractable polyphenols attached to polysaccharides with high antioxidant activity and prebiotic effect. Lee fibre had the highest water retention capacity and oil retention capacity. The results reveal that winemaking by-products could be used as a source of dietary fibre with functional characteristics for food applications.

Host preferences of low-trunk vascular epiphytes in a cloud forest of Veracruz, Mexico

2005 ◽  
Vol 21 (6) ◽  
pp. 651-660 ◽  
Author(s):  
Klaus Mehltreter ◽  
Alejandro Flores-Palacios ◽  
José G. García-Franco
Keyword(s):  
Water Retention ◽  
Cloud Forest ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Host Preferences ◽  
Host Group ◽  
Vascular Epiphytes ◽  
Lower Trunk ◽  
Tree Ferns ◽  
Epiphyte Species

The diversity, abundance and frequency of vascular epiphytes on the lower trunk were compared between two host groups of a Mexican cloud forest: angiosperm trees (n = 72) and tree ferns (n = 28). The bark of the five most frequent host trees and the root mantle of the two tree ferns were analysed for their thickness, water content, water retention capacity and pH. A total of 55 epiphyte species and 910 individuals were found on the 27 host species. On hosts with a dbh range of 5–10 cm, epiphytes were significantly more diverse (4.3±0.9 species per host) and more abundant (12.5±2.2 individuals per host) on tree ferns than on angiosperm trees (1.9±0.2 species per host and 3.9±0.6 individuals per host). However, these differences were not significant for the dbh class of 10–20 cm, because epiphyte numbers increased on angiosperm trees with larger host size, but not in tree ferns. Most epiphyte species had no preference for any host group, but four species were significantly more frequent on tree ferns and two species on angiosperm trees. The higher epiphyte diversity and abundance on tree fern trunks of the smallest dbh class is attributed to their presumably greater age and to two stem characteristics, which differed significantly between host groups, the thicker root mantle and higher water retention capacity of tree ferns. These bark characteristics may favour germination and establishment of epiphytes.

Effect of boiling on nutritional, antioxidant and physicochemical properties of edible plants (Malva parviflora and Myrtillocactus geometrizans)

2021 ◽  
pp. 510
Author(s):  
Sandoval-Gallegos Eli Mireya ◽  
Arias-Rico José ◽  
Cruz-Cansino Nelly del Socorro ◽  
Ramírez-Ojeda Deyanira ◽  
Zafra-Rojas Quinatzin Yadira ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Physicochemical Properties ◽  
Antioxidant Capacity ◽  
Water Retention ◽  
Nutritional Composition ◽  
Total Phenolic ◽  
Water Retention Capacity ◽  
Total Phenolic Compounds ◽  
Retention Capacity ◽  
Malva Parviflora

The aim of the present research was to determine the effect of boiling on nutritional composition, total phenolic compounds, antioxidant capacity, physicochemical and morphological characteristics of two edible plants Malva parviflora (mallow leaf) and Myrtillocactus geometrizans (garambullo flower). The plants had an important nutritional composition as carbohydrates (48-70 %), dietary fiber (36-42 %) and protein (13 %), as well as total phenolic compounds (468-750 mg GAE/100 g db) with a high antioxidant capacity. However, boiling originated the decrease of soluble compounds, carbohydrates, total phenolic compounds, antioxidant capacity and physicochemical properties. Plants changed to dark colors and physicochemical properties were affected, except to water retention capacity, oil retention capacity and viscosity, which had the same values in mallow leaves (raw and boiled), but increased water retention capacity in garambullo flowers, it may be by changes in the morphology observed. Therefore, is to suggest the raw consumption or with minimal cooking of these plants to avoid changes caused by thermal treatment.

Effect of Storage Time on the Physicochemical and Sensory Properties of Man-tou (Chinese Steamed Bread)

2007 ◽  
Vol 3 (3) ◽  
Author(s):  
Kun Sha ◽  
Ping Qian ◽  
Li-Jun Wang ◽  
Zhan-hui Lu ◽  
Li-Te Li
Keyword(s):  
Water Retention ◽  
Storage Time ◽  
Soluble Starch ◽  
Prolonged Storage ◽  
Water Retention Capacity ◽  
Study Quality ◽  
Total Water ◽  
Retention Capacity ◽  
Steamed Bread

In this study, quality of Man-tou, the Chinese traditional steamed bread during storage was studied. Values for water retention capacity, total water solubles, soluble starch, and soluble amylose and amylopectin of Man-tou decreased with storage time. Results showed that hardness, chewiness and gumminess of Man-tou increased, while, springiness cohesiveness and resilience decreased along with prolonged storage time (p<0.05). Sensory evaluation results showed that all sensory rating of Man-tou, including softness, stickiness, cohesiveness, elasticity, taste and total score, dropped drastically within 24 h of storage time (p<0.05). Differential Scanning Calorimeter (DSC) was used to determine crystalline structure of amylopectin in Man-tou, and the value for enthalpy of crystallization was found increased with storage time. Amylopectin crystallization was significantly associated to Man-tou firming (p<0.01).

scholarly journals Cowpea bean production under water stress using hydrogels

2017 ◽  
Vol 47 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Marília Barcelos Souza Lopes ◽  
Taynar Coelho de Oliveira Tavares ◽  
Danilo Alves Veloso ◽  
Niléia Cristina da Silva ◽  
Rodrigo Ribeiro Fidelis
Keyword(s):  
Water Stress ◽  
Water Use ◽  
Food Production ◽  
Water Retention ◽  
Block Design ◽  
Population Increase ◽  
Water Retention Capacity ◽  
Yield Losses ◽  
Retention Capacity ◽  
Randomized Block Design

ABSTRACT The population increase and the need of intensifying food production, coupled with the scarcity of water resources, have led to the search of alternatives that reduce consumption and optimize the water use during cultivation. In this context, hydrogels become a strategy in agricultural management, due to their water retention capacity in the soil and availability to plants. This study aimed at evaluating the efficiency of hydrogels on the development and production of cowpea bean ('Sempre-verde' cultivar) under water stress, in a greenhouse. The experiment was performed in a randomized block design, with five replications, in a 4 x 5 factorial scheme, consisting of four types of hydrogel (Hydroplan-EB HyA, with granulometry of 1-3 mm; Hydroplan-EB HyB, with granulometry of 0.5-1 mm; Hydroplan-EB HyC, with granulometry < 0.5 mm; Polim-Agri, with granulometry of 1-0.5 mm) and five concentrations (0 g pot-1; 1.5 g pot-1; 3 g pot-1; 4.5 g pot-1; 6 g pot-1). The following traits were evaluated: number of pods per plant, number of grains per pod and grain yield. The highest concentration (6 g pot-1) resulted in a higher number of pods and yield for all the hydrogels, especially for HyC and Polim-Agro, which presented 7.4 pods plant-1 and 7.0 pods plant-1, with yield of 15.43 g plant-1 and 16.68 g plant-1, respectively. The use of hydrogel shows to be efficient for reducing yield losses under water stress.

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