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  • 1
    Online Resource
    Online Resource
    Effects of Varying Rates of Nitrogen and Biochar pH on NH3 Emissions and Agronomic Performance of Chinese Cabbage (Brassica rapa ssp. pekinensis)
    MDPI AG ; 2021
    In:  Agronomy Vol. 12, No. 1 ( 2021-12-27), p. 61-
    Details
    In: Agronomy, MDPI AG, Vol. 12, No. 1 ( 2021-12-27), p. 61-
    Abstract: NH3 emitted into the atmosphere undergoes intricate chemical reactions to form fine particulate matter PM2.5. Nitrogen fertilizers are one of the major sources of gaseous ammonia. Recently, research into using biochar to lessen NH3 emissions from agricultural land has taken center stage and several studies have been executed in that regard. However, biochar’s capacity to reduce emissions of gaseous NH3 from applied nitrogen fertilizers is affected by both soil and biochar properties. While the effects of soil properties on NH3 volatilizations have been widely studied, the data concerning the effects of biochar properties on NH3 volatilizations from the soil are still scanty. It is against this backdrop that this study examined the effects of biochar pH on emissions of NH3 from the soil amended with varying quantities of nitrogen, as well as the impact on the growth and productivity of Chinese cabbage. To achieve the study objectives, acidic (pH 5.7), neutral (pH 6.7) and alkaline (pH 11.0) biochars were used and each was added to the soil at a rate of 1% (w/w). Nitrogen fertilizers were applied at three rates of 160, 320, 640 kg ha−1. In comparison with the control, the acidic, neutral and alkaline biochar amendments reduced NH3 emissions by up to 18%, 20% and 15%, respectively. However, only neutral biochar produced higher Chinese cabbage yields than the urea-only amendment and the Chinese cabbage yields increased with the increasing rates of nitrogen applied. Combined applications of neutral biochar and 640 kg/ha of nitrogen are recommended for optimal cabbage yields and low NH3 emissions.
    Type of Medium: Online Resource
    ISSN: 2073-4395
    URL: Article
    DOI: 10.3390/agronomy12010061
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2607043-1
    SSG: 23
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  • 2
    Online Resource
    Online Resource
    Pyrolysis temperature and time of rice husk biochar potentially control ammonia emissions and Chinese cabbage yield from urea-fertilized soils
    Springer Science and Business Media LLC ; 2024
    In:  Scientific Reports Vol. 14, No. 1 ( 2024-03-08)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 14, No. 1 ( 2024-03-08)
    Abstract: Current agricultural practices are increasingly favoring the biochar application to sequester carbon, enhance crop growth, and mitigate various environmental pollutants resulting from nitrogen (N) loss. However, since biochar’s characteristics can vary depending on pyrolysis conditions, it is essential to determine the optimal standard, as they can have different effects on soil health. In this study, we categorized rice husk biochars basis on their pH levels and investigated the role of each rice husk biochar in reducing ammonia (NH 3 ) emissions and promoting the growth of Chinese cabbage in urea-fertilized fields. The findings of this study revealed that the variation in pyrolysis conditions of rice husk biochars and N rates affected both the NH 3 emissions and crop growth. The neutral (pH 7.10) biochar exhibited effective NH 3 volatilization reduction, attributed to its high surface area (6.49 m 2  g −1 ), outperforming the acidic (pH 6.10) and basic (pH 11.01) biochars, particularly under high N rates (640 kg N ha −1 ). Chinese cabbage yield was highest, reaching 4.00 kg plant −1 , with the basic biochar application with high N rates. Therefore, the neutral rice husk biochar effectively mitigate the NH 3 emissions from urea-treated fields, while the agronomic performance of Chinese cabbage enhanced in all biochar amendments.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-024-54307-2
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2024
    detail.hit.zdb_id: 2615211-3
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  • 3
    Online Resource
    Online Resource
    The combined effect of nitrogen and biochar amendments on the yield and glucosinolate contents of the Chinese cabbage
    Elsevier BV ; 2022
    In:  Journal of King Saud University - Science Vol. 34, No. 2 ( 2022-02), p. 101799-
    Details
    In: Journal of King Saud University - Science, Elsevier BV, Vol. 34, No. 2 ( 2022-02), p. 101799-
    Type of Medium: Online Resource
    ISSN: 1018-3647
    URL: Article
    DOI: 10.1016/j.jksus.2021.101799
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2514731-6
    SSG: 11
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  • 4
    Online Resource
    Online Resource
    Influence of individual and co-application of organic and inorganic fertilizer on NH3 volatilization and soil quality
    Elsevier BV ; 2022
    In:  Journal of King Saud University - Science Vol. 34, No. 5 ( 2022-07), p. 102068-
    Details
    In: Journal of King Saud University - Science, Elsevier BV, Vol. 34, No. 5 ( 2022-07), p. 102068-
    Type of Medium: Online Resource
    ISSN: 1018-3647
    URL: Article
    DOI: 10.1016/j.jksus.2022.102068
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2514731-6
    SSG: 11
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  • 5
    Online Resource
    Online Resource
    Nutrient Dynamics in Sandy Soil and Leaf Lettuce Following the Application of Urea and Urea-Hydrogen Peroxide Impregnated Co-Pyrolyzed Animal Manure and Bone Meal
    MDPI AG ; 2021
    In:  Agronomy Vol. 11, No. 8 ( 2021-08-20), p. 1664-
    Details
    In: Agronomy, MDPI AG, Vol. 11, No. 8 ( 2021-08-20), p. 1664-
    Abstract: There is a paucity of data regarding the effect of nutrient-enriched biochar amendments on nutrient dynamics in both soil and crops. This is important because unlike pristine biochar, nutrient-enriched biochar is applied to the soil in minute quantities as large amounts may led to over application of the nutrients loaded in it. The current study examined the effects of both phosphorus- and nitrogen-enriched biochars on the dynamics of both macro and micronutrients in the sandy soil and leaf lettuce grown thereon. The phosphorus enrichment followed co-pyrolysis of animal manure (cow dung) with 25% and 50% bone meal (w/w), while the nitrogen enrichment was achieved by soaking the co-pyrolyzed biochar into urea and urea-hydrogen peroxide. The performances of the nutrient-enriched biochar were compared with the conventional amendment of urea and triple superphosphate (TSP) in the production of leaf lettuce over a period of two seasons in a pot experiment. The nutrient-enriched biochar amendments resulted into higher microbial biomass carbon and carbon to nitrogen ratios than the conventional amendment. The conventional amendment caused more phosphorus, potassium, and magnesium accumulations in the leaf lettuce than the nutrient-enriched biochar amendments. The nutrient-enriched biochar amendments led to more accumulations of nitrogen, calcium, and micronutrient elements in the leaf lettuce and availabilities of all the nutrient elements in the soil and thus, nutrient-enriched biochar acted as a reservoir that could provide nutrients to the growing lettuce beyond a single growing season.
    Type of Medium: Online Resource
    ISSN: 2073-4395
    URL: Article
    DOI: 10.3390/agronomy11081664
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2607043-1
    SSG: 23
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  • 6
    Online Resource
    Online Resource
    Effects of brewer’s spent grain biochar on the growth and quality of leaf lettuce (Lactuca sativa L. var. crispa.)
    Springer Science and Business Media LLC ; 2021
    In:  Applied Biological Chemistry Vol. 64, No. 1 ( 2021-12)
    Details
    In: Applied Biological Chemistry, Springer Science and Business Media LLC, Vol. 64, No. 1 ( 2021-12)
    Abstract: The need for organic soil amendments is increasing in the Republic of Korea against the backdrop of increased soil acidification and nutrient losses. The pyrolysis of biomass produces biochar which not only increases soil productivity but also provides environmental benefits through carbon sequestration. The portion of the brewer’s spent grain (BSG) recycled is by far less than the amount generated, but pyrolysis can help to reverse this trend by turning BSG waste into a valuable soil amendment. The current study, therefore, evaluated the effects of brewer’s spent grain biochar (BB XXX ) produced at three different temperatures of 300 °C, 500 °C and 700 °C on the yield and quality characteristics of the leaf lettuce as well as the effects on soil chemical properties through a pot experiment. Each of the BB XXX and BSG were added to the soil at two rates of 2% and 5% by weight. The pH and carbon content of the BBxxx increased with increasing pyrolysis temperatures and the trend was replicated in the soil upon biochar application i.e. the soil pH and carbon content increased alongside temperatures at which biochar was pyrolyzed. On the other hand, however, the soil electrical conductivity (EC) diminished with the increasing pyrolysis temperatures of the biochar applied. With regards to crop growth, the BB 500 5% amendment produced the highest marketable yield of the leaf lettuce and while the lettuce grown on the control produced leaf lettuce with the lowest content of nitrate nitrogen, BB 500 5% amendment generally produced the highest quality lettuce. The results indicate that BB 500 performed agronomically better than the rest of the amendments and is thus recommended as an effective BSG recycling measure.
    Type of Medium: Online Resource
    ISSN: 2468-0834 , 2468-0842
    URL: Article
    DOI: 10.1186/s13765-020-00577-z
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2846955-0
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