يعرض 1 - 10 نتائج من 10 نتيجة بحث عن '"Abreu-Junior, Cassio H."', وقت الاستعلام: 1.91s تنقيح النتائج
  1. 1
    دورية أكاديمية

    المصدر: IOP Conference Series: Materials Science and Engineering ; volume 1196, issue 1, page 012027 ; ISSN 1757-8981 1757-899X

    الوصف: The objectives of our study were to evaluate i) the soil fertility and fractionation of Ba, Cd, Cu, and Zn in the topsoil layer (0-0.20 m depth); and ii) production and concentration and accumulation of Ba, Cd, Cu, and Zn in the components of Eucalyptus trees at 36 months after sewage sludge (SS) application, with or without mineral P fertilizer, compared to mineral fertilization. Application of SS (at N criteria) with P increased soil organic matter and heavy metal concentrations, which were mostly bound to the oxidic and organic matter fractions. SS provided Eucalyptus production and heavy metal concentrations and accumulation in the trunk, branches, and leaves similar to mineral fertilization for high wood production. The application of SS (at N criteria) supplied with P increased soil heavy metal, fertility, and Eucalyptus production, without risk of environmental contamination.

  2. 2
    دورية أكاديمية
  3. 3
    دورية أكاديمية
  4. 4
    دورية أكاديمية

    المساهمون: Universidade Estadual Paulista (UNESP)

    الوصف: Agricultural recycling of human Class B biosolids in sugarcane (Saccharum spp.) crop is a promising alternative to reduce the costs of biosolids disposal. However, the presence of fecal contamination indicators such as thermotolerant coliforms and pathogenic organisms such as enterovirus and Ascaris spp. in biosolids impose barriers to effective and widespread use of biosolids as fertilizer. In addition, there is a scarcity of studies that investigate the persistence of these organisms in tropical soils. This study aimed to evaluate the persistence of pathogenic and fecal indicators for 258 d in a tropical clayey soil amended with human Class B biosolids and cultivated with sugarcane. Treatments were immediate incorporation of biosolids into soil after application (T1) or superficial application of biosolids followed by incorporation after 35 d (T2), emulating the typical procedure in sugarcane fields. Thermotolerant coliforms were estimated to persist for 437 d in T1 and 398 d in T2. For enterovirus, mean estimated persistence time in soil was 26 d for T1, but the sampling frequency was insufficient in T2 for persistence analysis. After 35 d, no enterovirus was detected in any sample. Mean estimated persistence time for viable Ascaris spp. eggs in soil was 22 d in T1 and 41 d in T2.

    وصف الملف: 526-530

    العلاقة: Journal of Environmental Quality; http://dx.doi.org/10.2134/jeq2018.07.0270Test; Journal of Environmental Quality, v. 48, n. 2, p. 526-530, 2019.; http://hdl.handle.net/11449/188930Test; 2-s2.0-85063798935

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  6. 6
    دورية أكاديمية
  7. 7
    دورية أكاديمية

    المساهمون: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Universidade de São Paulo, Agence Nationale de la Recherche, FAPESP

    المصدر: Plant and Soil ; volume 414, issue 1-2, page 339-354 ; ISSN 0032-079X 1573-5036

    مصطلحات موضوعية: Plant Science, Soil Science

  8. 8
    دورية أكاديمية

    المساهمون: Universidade Estadual Paulista (UNESP)

    مصطلحات موضوعية: Cotton, Micronutrient, Boron, Translocation, Remobilization

    الوصف: Boron (B) is the most deficient micronutrient in cotton (Gossypium hirsutum L.). It is generally accepted that B is immobile in cotton phloem, but some cultivars could remobilize the nutrient. In order to further understand B uptake and mobility in various cotton cultivars two experiments were conducted.In experiment-1, cotton cultivars were grown in B-10 enriched or natural abundance nutrient solutions for 4 weeks and transferred to nutrient solutions ranging from deficient to sufficient in B. In experiment-2 B-10 enriched boric acid was applied to cotton leaves and B mobilization was determined.In deficient plants, B previously supplied to roots was remobilized from older to younger plant tissues, but the amount was insufficient to maintain growth. Boron deficiency symptoms appeared and progressed with time. Boron applied to leaves was taken up and remobilized within 24 h. Boron mobilization was higher to plant parts above the treated region.Boron uptake and mobilization was similar among cotton cultivars. Boron applied to cotton leaves shows a preferential translocation to younger tissues. Foliar sprays of B to cotton may be used to cope with a temporary deficiency, but to achieve full growth and development B must be available to cotton throughout the plant cycle.

    وصف الملف: 241-253

    العلاقة: Plant and Soil; 3.306; http://dx.doi.org/10.1007/s11104-013-1957-9Test; Plant And Soil. Dordrecht: Springer, v. 375, n. 1-2, p. 241-253, 2014.; http://hdl.handle.net/11449/113304Test; WOS:000331204500019; 5720775873259528; orcid:0000-0003-2001-0874

  9. 9
    دورية أكاديمية
  10. 10
    دورية أكاديمية

    المصدر: Plant and Soil ; volume 375, issue 1-2, page 241-253 ; ISSN 0032-079X 1573-5036

    مصطلحات موضوعية: Plant Science, Soil Science