Post‐Harvest Physiology

Coblentz, W.K.

doi:10.1002/9781119436669.ch40

Cited by 3 publications

(3 citation statements)

References 106 publications

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“…Roaring Springs showed the most consistent and greatest benefit from additional N inputs, more than doubling the dry weight of the control. However, all remaining ecotypes had more modest responses, ranging from an increase of 23% (Stampede) to a decrease of 25% (Jackson) relative to 0 N. This is less than previous papers' reported yields for 1-6-year plots, with applications of 200 N increasing yields by 25% to more than double that of 0 N [4][5][6][7]9]. Plant nitrogen concentrations for the EG ecotypes declined over the season.…”

Section: Discussionmentioning

confidence: 81%

“…In Kansas, Moyer and Sweeney [8] found that N fertilizer applications of up to 200 kg/ha to 'Pete' EG resulted in 48% to 131% yield increases relative to zero for plots 15 to 23 years old. 'Pete' EG dry matter production has also been shown to increase by an average of 25% relative to zero one to three years after seeding in Wisconsin, when Coblentz [9] applied N at 202 kg/ha. There has even been some evidence of nitrogen fixation with EG [10].…”

Section: Introductionmentioning

confidence: 99%

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Eastern Gamagrass Responds Inconsistently to Nitrogen Application in Long-Established Stands and within Diverse Ecotypes

Kiniry,

Williams,

Jacot

et al. 2024

Agronomy

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Eastern gamagrass (Tripsacum dactyloides) is a highly productive, highly palatable native grass tolerant to both drought and flooding. It has frequently shown great response to nitrogen (N) applications, but the responses of southern native ecotypes in upland and bottomland sites have yet to be reported. The objectives were to measure the responses of long-established eastern gamagrass with different N application rates in two bottomland hay pastures and two upland grazed sites, and to measure the N responses for six diverse ecotypes in a common garden. A randomized block design was used with ecotype as the main block and fertilizer rate as the subplot. In the long-established sites, 75 N peak yields were not statistically different to those of 0 N, while upland yields across the season were consistently higher for 150 N but varied for the bottomland. The common garden ecotypes had no significant difference in yield between treatments when averaged across years. Roaring Springs showed the most consistent and greatest benefit to additional N, more than doubling the dry weight of the control. All remaining ecotypes, however, had more modest responses. Eastern gamagrass responds inconsistently to applications of 75 N, whereas most applications of 150 N generally result in higher yield, though significant increases are not guaranteed.

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Section: Discussionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Eastern Gamagrass Responds Inconsistently to Nitrogen Application in Long-Established Stands and within Diverse Ecotypes

Kiniry,

Williams,

Jacot

et al. 2024

Agronomy

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“…Therefore, there is a need to examine/monitor the temperature at different locations in the silo to design for quality monitoring and control. Management strategies for the stored grain mass would be adequately enabled by understanding the physiology of the post-harvest processes [18], [19], [20].…”

Section: Introductionmentioning

confidence: 99%

Modelling and Implementation for Airflow and Temperature Distribution in a Small-Scale Granary

Onibonoje

Baandele

Fabunmi

2020

JERA

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One major feature of a granary is the uneven distribution of temperature and airflow. Due to the large variability in the parameters to be considered in characterizing the feature, a pilot test serves as the better way to performing the experiment, which subsequently affects the airflow velocity distribution, and is very difficult to determine by natural experiment. This paper develops a model for uneven airflow and temperature distribution through the layers of stored grains, relative to the indicated parameters. The study aims at predicting the various thermo-physical properties of maize grains using the developed model with the incorporated several expressions obtained, and compare with the measured values through the deployed pilot mini silo. To validate the model, the bin was aerated with forced air at constant humidity and temperature. A mini cylindrical silo was also developed and deployed with bulk grains for a pilot test. The predicted results were compared with the measured values of the temperatures obtained in the various locations of the pilot silo. The two results were closely related, thereby establishing the validity of our model. The model provides information on the direction of flow and velocity in each location within the stored volume of grains, and data for grain cooling, airing and drying in the bin. The developed model is useful for predicting the temperature distribution, airflow and the cooling time for bulk grains under varying aeration conditions, and suitable for optimizing the design and operation of granary systems.

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Factors affecting nutrient losses in hay production

Zamudio,

Killerby,

Charley

et al. 2024

Grass and Forage Science

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The primary objective of haymaking is to dry forage adequately to inhibit the growth of undesirable microbes and halt residual plant enzymatic activity that causes nutrient losses. During the field and storage phases of haymaking, the environment, management practices, and other factors influence the extent of dry matter losses. This review discusses these factors and the strategies that have been developed to mitigate nutrient losses. A major emphasis was placed on hay microbiome dynamics, as it has been scarcely studied despite its importance on nutrient losses during storage and harvest, especially under humid conditions. The effects of cutting height, mower type, and swath manipulation on soil contamination were discussed. Also, the impact of environmental conditions and swath manipulation on wilting time was analysed for humid and arid conditions. Special attention was given to design improvements in harvesting equipment to reduce wilting time and field losses. Furthermore, we assessed the nutrient losses during storage caused by microbial and residual plant enzymatic activity resulting from excessive moisture at baling or re‐introduced moisture during storage. The spoilage extent during storage depends on bale moisture, size, density, shape, wrapping, forage type, and storage facilities. A Venn diagram analysis showed that each phase of haymaking process has a unique microbiome and that certain fungal and bacterial genera could be shared across more than one hay production phase. To take corrective actions, hay producers need to be aware of the increased susceptibility to nutrient losses associated with particular field and storage practices, environmental conditions, and forage types.

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Post‐Harvest Physiology

Cited by 3 publications

References 106 publications

Eastern Gamagrass Responds Inconsistently to Nitrogen Application in Long-Established Stands and within Diverse Ecotypes

Eastern Gamagrass Responds Inconsistently to Nitrogen Application in Long-Established Stands and within Diverse Ecotypes

Modelling and Implementation for Airflow and Temperature Distribution in a Small-Scale Granary

Factors affecting nutrient losses in hay production

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