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Changes in a Rhodic Hapludox under no-tillage and urban waste compost in the northwest of Rio Grande do Sul, Brazil Rev. Bras. Ciênc. Solo
Moraes,Moacir Tuzzin de; Silva,Vanderlei Rodrigues da; Cherubin,Maurício Roberto; Carlesso,Reimar; Debiasi,Henrique; Levien,Renato.
The use of urban waste compost as nutrient source in agriculture has been a subject of investigation in Brazil and elsewhere, although the effects on soil physical and chemical properties and processes are still poorly known. The aim of this study was to evaluate the effect of application of urban waste compost and mineral fertilizer on soil aggregate stability and organic carbon and total nitrogen content of a Rhodic Hapludox under no-tillage in the northwestern region of Rio Grande do Sul, Brazil, in the 2009/2010 and 2010/2011 growing seasons. The experiment was arranged in a 2 × 6 (seasons and fertilization) factorial in a randomized complete block design with four replications. The factor time consisted of two growing seasons (sunflower in 2009/10 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil organic carbon; Aggregate stability; Total nitrogen; Soil structure; Organic manure.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400028
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La materia orgánica del suelo en seis agroecosistemas de la sabana de Huimanguillo, Tabasco. Colegio de Postgraduados
Murillo de la Rosa, Arnulfo.
Los suelos de la sabana de Huimanguillo, se localizan en lomeríos con pendientes ligeras, son de baja fertilidad, presentan alta acidez con pH que oscilan entre 4.0 a 5.5 y contenidos de materia orgánica de 1 a 4 %, a veces hasta de 20 %. La materia orgánica desempeña un papel importante en el suelo ya que aporta una gran variedad de elementos nutritivos para las plantas, y modifica la estructura del mismo, el conocimiento sobre su aporte de nutrientes es escaso, por lo que, las estimaciones del suministro al suelo se basan más bien en el rendimiento. El presente trabajo tuvo como objetivo estimar la densidad aparente (Dap), las reservas de carbono orgánico total (COT), nitrógeno total (Nt), la relación carbono nitrógeno (C/N), el carbono orgánico soluble...
Palavras-chave: Acrisol; Agroecosistemas; Densidad aparente; Carbono orgánico total; Nitrógeno total; Carbono orgánico soluble; Indice óptico y relación C/N; Agroecosystems; Bulk density; Total organic carbon; Total nitrogen; Soluble organic carbon; Optical index and C/N; Maestría; Producción Agroalimentaria en el Trópico.
Ano: 2010 URL: http://hdl.handle.net/10521/254
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Matéria orgânica nos ecossistemas de floresta primária e pastagens na Amazônia Central. Infoteca-e
TEIXEIRA, L. B.; BASTOS, J. B..
1989
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Materia organica; Floresta; Ecossistema; Pastagem; Capim quicuio; Biomassa; Nitrogenio total; Brachiaria humidicola; Campo experimental de Zootecnia da UEPAE Manaus; Amazonas; Amazonia; Brasil; Organic matter; Forest; Ecosystem; Pasture; Kykuyo grass; Biomass; Total nitrogen.
Ano: 1989 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/381129
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Nitrogênio da biomassa microbiana em solo de Cerrado com aplicação de fertilizante nitrogenado. Repositório Alice
COSER, T. R.; RAMOS, M. L. G.; AMABILE, R. F.; RIBEIRO JÚNIOR, W. Q..
2007
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Qualidade do solo; Nitrogênio total; Hordeum vulgare; Soil quality; Total nitrogen.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/822341
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Nitrogênio da biomassa microbiana em solo de Cerrado com aplicação de fertilizante nitrogenado. Repositório Alice
COSER, T.R.; RAMOS, M.L.G.; AMABILE, R.F.; RIBEIRO JÚNIOR, W.Q..
O objetivo deste trabalho foi avaliar o efeito da adubação nitrogenada no nitrogênio da biomassa microbiana do solo (NBMS), em diferentes profundidades, em um Latossolo Vermelho-Amarelo cultivado com cevada. O experimento foi instalado em junho de 2004, em área experimental de primeiro ano de plantio direto, anteriormente cultivada com milheto por três anos e posteriormente com soja por duas safras. Foram utilizados os seguintes tratamentos: quatro doses de nitrogênio (30, 60, 90 e 120 kg ha-1) e o controle sem adubação nitrogenada. As amostras de solo foram coletadas em quatro profundidades: 0-5, 5-10, 10-20 e 20-30 cm, com três repetições e em três épocas: perfilhamento pleno, floração e logo após a colheita. O NBMS e a razão NBMS:Ntotal diminuíram com a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Qualidade do solo; Nitrogênio total; Hordeum vulgare; Soil quality; Total nitrogen.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/123969
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Nitrogenous compounds, phenolic compounds and morphological aspects of leaves: comparison of deciduous and semideciduous arboreal legumes Scientia Agricola
Lima,Ana Lúcia da Silva; Zanella,Fábio; Schiavinato,Marlene Aparecida; Haddad,Claudia Regina Baptista.
In general, perennial species contain higher concentrations of certain secondary compounds, such as phenolics, lower levels of nitrogenous compounds, and greater specific leaf mass (SLM) than deciduous species. The aim of this study was to verify whether the comparative data reported in the literature regarding deciduous and evergreen species, also applies to four selected species of a semideciduous tropical forest (a remnant of the Atlantic Forest). The four species chosen for this study, each with apparently different leaf life spans, were two semideciduous (Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang., and Lonchocarpus guilleminianus (Tul.) Malme, and two deciduous (Enterolobium contortisiliquum (Vell.) Morong., and Peltophorum dubium...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf life span; Specific leaf mass; Total nitrogen; Tannins; Atlantic forest.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000100007
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Ph, Ammonia Flux, and Total Nitrogen in Duck Litter with Chemical Blends - A Field Study Rev. Bras. Ciênc. Avic.
Chung,TH.
ABSTRACT This study was designed to evaluate the effects of chemical blend additives to duck litter on pH, ammonia (NH3) fluxes, total nitrogen (TN) under a small pen trial. One hundred twenty 1-day-old duck (pekin) were randomly assigned to 6 pens in a completely randomized design during 6 weeks. Control received no litter treatment whereas top-dressed treatment at rates of 50 g aluminum sulfate + 50 aluminum chloride/kg duck litter were mixed into the upper 1 cm of duck litter. Duck litter pH at 2 weeks through 5 weeks was significantly affected (p<0.05) by chemical blend treatments compared to controls, but not at 6 weeks. During the experimental periods, NH3 fluxes decreased (p<0.05) in chemical blend treatments. However, there were no remarkable...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Chemical blend; PH; Ammonia flux; Total nitrogen; Duck litter.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400733
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Research on automation of a reductive dissolved organic nitrogen analyser ArchiMer
Lepoupon, C; Lin, Rg; Benaim, Jy; Merks, Aga.
The accurate classical batch method of Duursma (1961), based on the conversion of Dissolved Organic Nitrogen (DON) into NH3, is used as a basis for a new automatic DON analyser. After testing different possibilities through mechanical automation of the original batch technique, in which the conversion is preceded by the degassing of NH3 and drying of the sample, the procedure of autoanalyses has been selected. This procedure was simplified to the extent that a compact unit could be constructed, which would easily be applicable on board ship. The automatic method has a conversion phase in which in principle only DON is dissociated to NH4+, whereas both NO2- add NO3- are not reduced. This requires selective conditions and particularly high silver purity for...
Tipo: Text Palavras-chave: Dissolved organic nitrogen; Analysis; Automation; Reduction; Total nitrogen.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00093/20456/18128.pdf
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การปรับปรุงดินก่อนปลูกอ้อยโดยใช้ประโยชน์จากวัชพืชในธรรมชาติ และวัสดุหรือพืชบำรุงดินชนิดต่างๆ Thai Agricultural
Santimaitree Gonkhamdee; Prasit Jaisil; Wanwipa Kaewpradit Polpinit; Tassanee Wongphet.
Tipo: PhysicalObject Palavras-chave: Sugarcane; Sugarcane production; Soil improvement; Weed; Green manure; Upland rice; Crotalaria juncea; Filter cake; Soil amendment; Fallow; Soil management; Organic matter; Total nitrogen; Available phosphorus; อ้อย; การปลูกอ้อย; การปรับปรุงดิน; วัชพืช; พืชบำรุงดิน; ข้าวไร่; ปอเทือง; วัสดุปรับปรุงดิน; กากตะกอนหม้อกรอง; การจัดการดิน; อินทรียวัตถุ; ปริมาณไนโตรเจนทั้งหมด; ปริมาณฟอสฟอรัสที่เป็นประโยชน์; การเพิ่มความอุดมสมบูรณ์ดิน; วิธีการที่เหมาะสม; การลดต้นทุนการผลิต.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5823
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ปริมาณคาร์โบโฮเดรตและไนโตรเจนในใบและกิ่งของต้นกีวีพันธุ์บรูโนและการเกิดรากของกิ่งปักชำในรอบปี Thai Agricultural
Sungcom Techawongstien.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject Palavras-chave: Kiwi plants; Actinidia chinensis; Bruno; Leaves; Vines; Total nonstructural carbohydrates; Total nitrogen; Stem cuttings; Rooting; Seasonal changes; กีวี; พันธุ์บรูโน; ใบ; กิ่ง; คาร์โบโฮเดรต; ไนโตรเจน; การปักชำกิ่ง; กิ่งปักชำ; การเกิดราก; การเปลี่ยนแปลงตามฤดูกาล.
Ano: 1983 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5487
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