Factors affecting the nutritional quality of crops

1992 ◽  
Vol 7 (1-2) ◽  
pp. 63-68 ◽  
Author(s):  
Sharon B. Hornick
Keyword(s):  
Best Management Practices ◽  
Nutritional Quality ◽  
Management Practices ◽  
Animal Health ◽  
Organic Matter Content ◽  
Organic Fertilizers ◽  
Chemical Fertilizers ◽  
Postharvest Handling ◽  
And Storage

AbstractSeveral factors can directly or indirectly affect the nutritional quality of crops. Among these are soil factors, such as pH, available nutrients, texture, organic matter content and soil-water relationships; weather and climatic factors, including temperature, rainfall and light intensity; the crop and cultivar; postharvest handling and storage; and fertilizer applications and cultural practices. This paper deals primarily with fertilizer and cultural management practices, and on certain environmental factors that affect the nutritional quality of field crops and of fruits and vegetables. Earlier research that has investigated the nutritional status of crops grown with either chemical fertilizers or organic fertilizers is discussed. These studies often have given contradictory results on crop yields and on crops' mineral and vitamin contents. Other factors, such as maturity at harvest, postharvest handling and storage, anti-nutritive components, and residues of chemical fertilizers and pesticides are reviewed with respect to food safety and quality, and their implications for human and animal health. Future research needs are identified so that comparable results and valid comparisons can be obtained to identify the best management practices to ensure that food is safe and nutritious for the consumer.

scholarly journals Nutritional Losses in Fruits and Vegetables as a Function of Postharvest Handling and Storage

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 693f-693
Author(s):  
Eric A. Curry
Keyword(s):  
Nutritional Quality ◽  
Storage Time ◽  
Fruits And Vegetables ◽  
Dietary Recommendations ◽  
The World ◽  
Storage Atmosphere ◽  
Postharvest Handling ◽  
Time Changes ◽  
And Storage

Present dietary recommendations for fruits and vegetables should be based on the bioavailability of essential nutrients at the time of optimum harvest. Few people, however, are fortunate enough to have available freshly harvested produce all year. With the development of improved postharvest technology, shelf life has increased dramatically in many parts of the world. How does the nutritional quality of fruits and vegetables change with increasing storage time, changes in storage atmosphere, different postharvest processes? Do these changes have an impact on dietary recommendations? Apples are capable of being stored for up to 12 months with properly managed temperature and storage atmosphere. Because information regarding this subject is lacking for apple (and many other fruits and vegetables), perhaps a model can be developed based on work with other commodities to help us understand the nutritional changes associated with different postharvest treatments.

scholarly journals Effects of Organic Fertilizers on the Soil Microorganisms Responsible for N2O Emissions: A Review

2021 ◽  
Vol 9 (5) ◽  
pp. 983
Author(s):  
Cristina Lazcano ◽  
Xia Zhu-Barker ◽  
Charlotte Decock
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Best Management Practices ◽  
Management Practices ◽  
Organic Fertilizers ◽  
N2o Emissions ◽  
Soil C ◽  
Best Management ◽  
C Stocks ◽  
Denitrifying Microorganisms

The use of organic fertilizers constitutes a sustainable strategy to recycle nutrients, increase soil carbon (C) stocks and mitigate climate change. Yet, this depends largely on balance between soil C sequestration and the emissions of the potent greenhouse gas nitrous oxide (N2O). Organic fertilizers strongly influence the microbial processes leading to the release of N2O. The magnitude and pattern of N2O emissions are different from the emissions observed from inorganic fertilizers and difficult to predict, which hinders developing best management practices specific to organic fertilizers. Currently, we lack a comprehensive evaluation of the effects of OFs on the function and structure of the N cycling microbial communities. Focusing on animal manures, here we provide an overview of the effects of these organic fertilizers on the community structure and function of nitrifying and denitrifying microorganisms in upland soils. Unprocessed manure with high moisture, high available nitrogen (N) and C content can shift the structure of the microbial community, increasing the abundance and activity of nitrifying and denitrifying microorganisms. Processed manure, such as digestate, compost, vermicompost and biochar, can also stimulate nitrifying and denitrifying microorganisms, although the effects on the soil microbial community structure are different, and N2O emissions are comparatively lower than raw manure. We propose a framework of best management practices to minimize the negative environmental impacts of organic fertilizers and maximize their benefits in improving soil health and sustaining food production systems. Long-term application of composted manure and the buildup of soil C stocks may contribute to N retention as microbial or stabilized organic N in the soil while increasing the abundance of denitrifying microorganisms and thus reduce the emissions of N2O by favoring the completion of denitrification to produce dinitrogen gas. Future research using multi-omics approaches can be used to establish key biochemical pathways and microbial taxa responsible for N2O production under organic fertilization.

scholarly journals Influence of basin connectivity on sediment source, transport, and storage within the Mkabela Basin, South Africa

2012 ◽  
Vol 9 (9) ◽  
pp. 10151-10204 ◽  
Author(s):  
J. R. Miller ◽  
G. Mackin ◽  
P. Lechler ◽  
M. Lord ◽  
S. Lorentz
Keyword(s):  
South Africa ◽  
Best Management Practices ◽  
Management Practices ◽  
Drainage System ◽  
Sediment Source ◽  
Riparian Wetlands ◽  
Valley Bottom ◽  
Sediment Size ◽  
Catchment Areas ◽  
And Storage

Abstract. The management of sediment and other non-point source (NPS) pollution has proven difficult, and requires a sound understanding of particle movement through the drainage system. The primary objective of this investigation was to obtain an understanding of NPS sediment source(s), transport, and storage within the Mkabela basin, a representative agricultural catchment within the KwaZulu-Natal Midlands of southeastern South Africa, by combining geomorphic, hydrologic and geochemical fingerprinting analyses. The Mkabela Basin can be subdivided into three distinct subcatchments that differ in their ability to transport and store sediment along the axial valley. Headwater (upper catchment) areas are characterized by extensive wetlands that act as significant sediment sinks. Mid-catchment areas, characterized by higher relief and valley gradients, exhibit few wetlands, but rather are dominated by a combination of alluvial and bedrock channels that are conducive to sediment transport. The lower catchment exhibits a low-gradient alluvial channel that is boarded by extensive riparian wetlands that accumulate large quantities of sediment (and NPS pollutants). Fingerprinting studies suggest that silt- and clay-rich layers found within wetland and reservoir deposits are derived from the erosion of fine-grained, valley bottom soils frequently utilized as vegetable fields. Coarser-grained deposits within both wetlands and reservoirs result from the erosion of sandier hillslope soils extensively utilized for sugar cane, during relatively high magnitude runoff events that are capable of transporting sand-sized sediment off the slopes. Thus, the source of sediment to the axial valley varies as a function of sediment size and runoff magnitude. Sediment export from the basin was limited until the early 1990s, in part because the upper catchment wetlands were hydrologically disconnected from lower parts of the watershed during low- to moderate flood events. The construction of a drainage ditch through a previously unchanneled wetland altered the hydrologic connectivity of the catchment, allowing sediment to be transported from the headwaters to the lower basin where much of it was deposited within the riparian wetlands. The axial drainage system is now geomorphically and hydrologically connected during most events throughout the study basin. The study indicates that increased valley connectivity partly negated the positive benefits of controlling sediment/nutrient exports from the catchment by means of upland based, best management practices.

scholarly journals Use of Tannin-Containing Plants as Antimicrobials Influencing the Animal Health

2022 ◽  
Vol 45 (2) ◽  
pp. 33-40
Author(s):  
Mohammed M Dakheel ◽  
Afnan A Al-Mnaser ◽  
Jessica Quijada ◽  
Martin J Woodward ◽  
Caroline Rymer
Keyword(s):  
Nutritional Quality ◽  
Condensed Tannins ◽  
Animal Health ◽  
Degree Of Polymerization ◽  
Gram Negative Bacteria ◽  
Animal Feeding ◽  
The Subject

The antimicrobial effects of diverse tannin-containing plants, particularly condensed tannins (CTs) produced from various plants, are the subject of this study. CT components can be determined using CT-specific procedures such the HCl-Butanol Acetone assay, Thiolysis reaction, and HPLC/MS analysis. These methods indicate CT contents, including mean degree of polymerization, the procyanidins and prodelphinidins ratio (PC/PD%), the isomers of trans- and cis-, and CT concentration. Tannin-containing plants possess antibacterial action, which can be attributed to their protein linkage technique, and tannin-type variations, particularly CTs extract and their PC/PD%. The effects of CT components on the development of Gram-positive and Gram-negative bacteria have been documented for their relative PC/PD%; this is regarded to be a key predictor of tannin characteristics in terms of antimicrobials. In conclusion, tannins, more specific CT compositions, have significant impacts on in vivo trials of animal productions and utilization of metabolites and fermentation in vitro experiments. These findings need further investigations to fully understand how CT-types act on animal feeding in terms of enhanced nutritional quality of animal diets, which may have implications for human and animal health.

scholarly journals Phenolics in Aerial Parts of Persian Clover: Trifolium resupinatum

2009 ◽  
Vol 4 (12) ◽  
pp. 1934578X0900401 ◽  
Author(s):  
Bogdan Janda ◽  
Anna Stochmal ◽  
Paula Montoro ◽  
Sonia Piacente ◽  
Wieslaw Oleszek
Keyword(s):  
Nutritional Quality ◽  
Dry Matter ◽  
Animal Health ◽  
Chlorogenic Acids ◽  
Aerial Parts ◽  
Phenolic Constituents ◽  
Kaempferol Glycosides ◽  
Persian Clover ◽  
Trifolium Resupinatum

The nutritional quality of Persian clover (Trifolium resupinatum), an important pasture crop, depends not only on a high protein content but also on the occurrence of animal health and welfare promoting phytochemicals. Nine phenolic constituents present in the aerial parts of this species were isolated and their structures confirmed by NMR and ESI-MS analyses. The compounds included two chlorogenic acids, four quercetin and two kaempferol glycosides, as well as the isoflavone formononetin-7-glucoside. The concentration of isoflavone was low, not exceeding 1.2 mg/g of dry matter. The concentration of flavonols ranged between 5.9 and 11.8 mg/g, depending on the sampling dates, with the highest concentration occurring in the first cut. A similar trend in the concentration was found for chlorogenic acids, which ranged from 2 mg/g in summer to 7.3 mg/g in spring.

scholarly journals 184 Review of animal welfare data for cattle and swine

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 13-14
Author(s):  
Michelle S Calvo-Lorenzo
Keyword(s):  
Beef Cattle ◽  
Animal Welfare ◽  
Management Practices ◽  
Animal Health ◽  
Herd Health ◽  
Mortality Trends ◽  
The Past ◽  
Mobility Data ◽  
Transport Losses

Abstract Interest in the topic of animal welfare continues to grow as knowledge about the quality of life of food animals evolves. Improving management practices that enhance welfare conditions for livestock requires tools that allow livestock caretakers to assess and address animal welfare conditions effectively and practically on farms. Over the past several years, Elanco Animal Health has developed analytical resources for beef cattle and swine producers to inform them on trends associated with finished cattle mobility and mortality, and transport losses in marketed swine. This presentation will share findings from Elanco’s databases and the published literature to inform and foster discussion important to livestock welfare advancements. Relative to finished cattle mobility, data captured from 11.5 M head (2015–2019) demonstrate that cattle mobility continues to trend positively with approximately 90% of cattle observed with normal mobility conditions at packing plants (Edwards-Callaway et al., 2017); however, mortality trends and veterinary medical charges are higher over the past 5 years (2014–2018) when closeout data from 41.8 M head of beef cattle are evaluated across U.S. feedlots. Relative to market weight pig transport losses, an industry survey of 310 M pigs (2012–2015) indicate that averages for total dead pigs, non-ambulatory pigs, and total losses were 0.26%, 0.63%, and 0.88%, respectively (Yoder et al., 2017), which is similar to reported values in the literature (Ritter et al., 2009). Collectively, this information is important for measuring continuous improvement and determining where opportunities exist to evaluate management practices associated with herd health protocols, seasonal impacts, handling, and transport conditions. Animal welfare challenges are a non-compete issue for the livestock industry, and tools to assess these welfare topics are key to the enhancement of current practices and development of novel approaches to positively impact the role that livestock caretakers have on animal welfare.

Quality of Municipal Solid Waste Compost from Mechanical Biological Treatment (MBT)

2020 ◽  
Vol 898 ◽  
pp. 64-70
Author(s):  
Erna Lestianingrum ◽  
Misnen
Keyword(s):  
Biological Treatment ◽  
Production Cost ◽  
Alternative Fuels ◽  
Organic Fertilizer ◽  
Environmental Issues ◽  
Organic Fertilizers ◽  
Chemical Fertilizers ◽  
Total N ◽  
Increasing Demand

Fertilization for agriculture and plantation nutrition still dominated by chemical fertilizers. Organic fertilizers utilization for soils is believed has not had the same quality as existing fertilizer standards. On the other hand, increasing waste problems has become environmental issues that have not been properly resolved. MSW process by using MBT Method is able to change the waste management system and produce RDF Fluff products as alternative fuels and compost fertilizers. Research have showed that the quality of organic fertilizer from the Mechanical Biological Treatment (MBT) process met the SNI 19-7030-2004 parameters with the total N = 1.38%, P2O5 = 0.66% and K2O = 2.34%. Production cost of making organic fertilizer is lower than NPK and the amount used for ground application is higher than NPK. Market confidence began gradually improving due to consumer increasing demand.

Effectiveness Monitoring of Silvicultural Best Management Practices in South Carolina

1995 ◽  
Vol 19 (4) ◽  
pp. 170-176 ◽  
Author(s):  
Tim O. Adams ◽  
Donal D. Hook ◽  
Michael A. Floyd
Keyword(s):  
South Carolina ◽  
Best Management Practices ◽  
Management Practices ◽  
Accurate Method ◽  
Stream Habitat ◽  
Best Management ◽  
Effectiveness Monitoring ◽  
Bmp Effectiveness ◽  
Compliance Check

Abstract Rapid Bioassessment Protocols (RBPs) were evaluated for use in monitoring the effectiveness of silvicultural Best Management Practices (BMPs) on 27 harvested sites in South Carolina. RBP bioassessments were compared to BMP compliance checks for agreement. The results indicate that a weight-of-the-evidence approach utilizing a BMP compliance check, a stream habitat assessment, and a benthic macroinvertebrate bioassessment is the most accurate method of evaluating BMP effectiveness. These data show that implementation of BMPs during harvesting operations was sufficient for the protection of the water quality of associated streams. South. J. Appl. For. 19(4):170-176.

Effects of pasteurization and storage conditions on donkey milk nutritional and hygienic characteristics

2018 ◽  
Vol 85 (4) ◽  
pp. 445-448 ◽  
Author(s):  
Mina Martini ◽  
Federica Salari ◽  
Iolanda Altomonte ◽  
Giuseppe Ragona ◽  
Alice Piazza ◽  
...  
Keyword(s):  
Nutritional Quality ◽  
Storage Conditions ◽  
Prolonged Storage ◽  
Microbiological Analysis ◽  
Thermal Treatments ◽  
Donkey Milk ◽  
Freezing Temperatures ◽  
Few Data ◽  
And Storage

Until now there are only few data on the effects of thermal treatments on the nutritional and hygienic characteristics of donkey milk. This Research Communication aims to provide information on the effects of pasteurization (at +65 °C for 30 min) and prolonged storage at refrigeration and freezing temperatures (21 d at + 3 °C ± 2 °C and up to 90 d at −20 °C ± 5 °C) on some nutritional and hygienic characteristics of Amiata donkey milk. The milk was monitored by chemical and microbiological analysis. Pasteurization ensured compliance with EC Regulation No 1441/2007, as Enterobacteriaceae were never found in the milk, or during storage at refrigeration and freezing temperatures. Colony count at 30 °C in pasteurized milk never went beyond 1 log CFU/ml. The heat treatment and the storage did not result in any variations in the main constituents of the milk. Only a decrease in lactose and few variations in some fatty acids at 90 d of freezing were observed. In conclusion, pasteurization was able to achieve and maintain a high hygienic-sanitary quality over time; storage at refrigeration or freezing temperatures did not alter the nutritional quality of fat and the gross composition of the product. These findings are useful to improve knowledge on the milk shelf life in order to guarantee safety and nutritional quality for infants who need small quantities of daily milk.

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