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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
10/03/2017 |
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Data da última atualização: |
20/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
REICHERT, J. M.; RODRIGUES, M. F.; BERVALD, C. M. P.; KATO, O. R. |
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Afiliação: |
José Miguel Reichert, UFSM; Miriam Fernanda Rodrigues, UFSM; Clóvis Moisés Priebe Bervald, GSI Brazil; OSVALDO RYOHEI KATO, CPATU. |
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Título: |
Fire-free fallow management by mechanized chopping of biomass for sustainable agriculture in Eastern Amazon: effects on soil compactness, porosity, and water retention and availability. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Land Degradation & Development, v. 27, n. 5, p. 1403-1412, July 2016. |
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DOI: |
10.1002/ldr.2395 |
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Idioma: |
Inglês |
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Conteúdo: |
Many Amazon soils are naturally fragile and develop under intense rainfall and high temperature climate. Soil structural quality is improvable through vegetation management systems providing abundant soil mulch and little soil disturbance. We tested the effect of the chopping-and-mulching systems of secondary forest-vegetation on selected soil physical properties of a sandy Oxisol, located in the eastern Brazilian Amazon. The treatments consisted of two fallow forest-vegetation, namely, chop-and-mulch of secondary vegetation with a dual vertical-rotor chopper (VC) and with a horizontal-rotor chopper (HC) and a control composed of standing secondary forest-vegetation (SF). Six months after vegetation chopping, we evaluated soil bulk density (BD), degree-of-compactness (DC), pore-size distribution and soil hydraulic properties. Compared with SF, the VC and HC systems did not affect soil BD in surface layer (0·00?0·05 m) but increased BD in subsurface layers. DC in surface layer are below the range of the optimum values for most crops (77%?88%), while for other layers DC was within this optimum range. High macroporosity and sandy granulometry were responsible for high drainable water from soil saturation until field capacity, down to 0·20 m depth in all systems. Pore-size distribution was influenced by vegetation chopping with increase in smaller pores. These pores represent a small percentage of total porosity and contribute more to water retention and availability. Chopping by VC and HC mechanisms was effective in maintaining soil physical quality, characterized by lower soil bulk density, higher porosity and water retention, build up during growth of secondary vegetation in fallow period between cash crops. MenosMany Amazon soils are naturally fragile and develop under intense rainfall and high temperature climate. Soil structural quality is improvable through vegetation management systems providing abundant soil mulch and little soil disturbance. We tested the effect of the chopping-and-mulching systems of secondary forest-vegetation on selected soil physical properties of a sandy Oxisol, located in the eastern Brazilian Amazon. The treatments consisted of two fallow forest-vegetation, namely, chop-and-mulch of secondary vegetation with a dual vertical-rotor chopper (VC) and with a horizontal-rotor chopper (HC) and a control composed of standing secondary forest-vegetation (SF). Six months after vegetation chopping, we evaluated soil bulk density (BD), degree-of-compactness (DC), pore-size distribution and soil hydraulic properties. Compared with SF, the VC and HC systems did not affect soil BD in surface layer (0·00?0·05 m) but increased BD in subsurface layers. DC in surface layer are below the range of the optimum values for most crops (77%?88%), while for other layers DC was within this optimum range. High macroporosity and sandy granulometry were responsible for high drainable water from soil saturation until field capacity, down to 0·20 m depth in all systems. Pore-size distribution was influenced by vegetation chopping with increase in smaller pores. These pores represent a small percentage of total porosity and contribute more to water retention and availability... Mostrar Tudo |
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Palavras-Chave: |
Corte mecanizado; Propriedades físicas do solo. |
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Thesagro: |
Agricultura Sustentável; Biomassa; Floresta; Vegetação Secundária. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02622naa a2200253 a 4500
001 2066722
005 2022-05-20
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1002/ldr.2395$2DOI
100 1 $aREICHERT, J. M.
245 $aFire-free fallow management by mechanized chopping of biomass for sustainable agriculture in Eastern Amazon$beffects on soil compactness, porosity, and water retention and availability.$h[electronic resource]
260 $c2016
520 $aMany Amazon soils are naturally fragile and develop under intense rainfall and high temperature climate. Soil structural quality is improvable through vegetation management systems providing abundant soil mulch and little soil disturbance. We tested the effect of the chopping-and-mulching systems of secondary forest-vegetation on selected soil physical properties of a sandy Oxisol, located in the eastern Brazilian Amazon. The treatments consisted of two fallow forest-vegetation, namely, chop-and-mulch of secondary vegetation with a dual vertical-rotor chopper (VC) and with a horizontal-rotor chopper (HC) and a control composed of standing secondary forest-vegetation (SF). Six months after vegetation chopping, we evaluated soil bulk density (BD), degree-of-compactness (DC), pore-size distribution and soil hydraulic properties. Compared with SF, the VC and HC systems did not affect soil BD in surface layer (0·00?0·05 m) but increased BD in subsurface layers. DC in surface layer are below the range of the optimum values for most crops (77%?88%), while for other layers DC was within this optimum range. High macroporosity and sandy granulometry were responsible for high drainable water from soil saturation until field capacity, down to 0·20 m depth in all systems. Pore-size distribution was influenced by vegetation chopping with increase in smaller pores. These pores represent a small percentage of total porosity and contribute more to water retention and availability. Chopping by VC and HC mechanisms was effective in maintaining soil physical quality, characterized by lower soil bulk density, higher porosity and water retention, build up during growth of secondary vegetation in fallow period between cash crops.
650 $aAmazonia
650 $aAgricultura Sustentável
650 $aBiomassa
650 $aFloresta
650 $aVegetação Secundária
653 $aCorte mecanizado
653 $aPropriedades físicas do solo
700 1 $aRODRIGUES, M. F.
700 1 $aBERVALD, C. M. P.
700 1 $aKATO, O. R.
773 $tLand Degradation & Development$gv. 27, n. 5, p. 1403-1412, July 2016.
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Embrapa Amazônia Oriental (CPATU) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
08/03/1996 |
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Data da última atualização: |
18/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
BLACKBURN, H. D.; ROCHA, J. L.; FIQUEIREDO, E. P.; BERNE, M. E.; VIEIRA, L. da S.; CAVALCANTE, A. C. R.; ROSA, J. S. |
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Afiliação: |
CNPC; CNPC; CNPC. |
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Título: |
Interaction of parasitism and nutrition and their effects on production and clinical parameters in goats. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Veterinary Parasitology, Amsterdam, v. 40, n. 1/2, p. 99-112, 1991. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Weaned wether goals (n=144) approximately 6.months of age were placed in a 2x3 factorial design experiment for 5 months to test the main effects and interaction of two levels of nutrition (growth+maintenance, NUTl; twice growth+maintenance, NUT2) and three levels of Haemonchus contortus burden (0, 500 and 2000 larvae administered every 2 weeks: WO, W500 and W2000, respectively) on weight, feed intake, level of infection and packed cell volume (PCV). The rationale for the experimental design was based on the lack of information concerning the interaction between nutritional status and worm burden. Results indicated significant effects of worm burden levels on PCV, faecal egg contents (eggs per gram of feces (EPG), actual worm numbers, feed intake and efficiency of feed utilization. Nutrition X worm burden interactions were also significant for PCV and EPG. However, the differences detected for PCV and actual worm numbers did not translate into large or consistent differences in body weight. Goats on NUT2, after an initial period, showed little difference in body weight, irrespective of worm burden. Within the NUTI level, WO kids weighed more than W500 or W2000 kids throughout the study. Although not statistically significant, this constitutes a trend towards an interaction between nutrition and worm burden. ln both nutrition levels, there were no body weight differences between W500 and W2000 until the last 14 days. Feed intake was depressed in the first 3 months of the experiment for infected animais, but was subsequently followed by a compensatory reaction. Lower establishment rates, based on actual worm counts, were observed for the higher infection level, but in both infection levels establishment rates tended to decrease with time. Nutrition was found to be more important to counteract the consequences of a parasitic infection than to counteract the establishment of that same infection. MenosAbstract: Weaned wether goals (n=144) approximately 6.months of age were placed in a 2x3 factorial design experiment for 5 months to test the main effects and interaction of two levels of nutrition (growth+maintenance, NUTl; twice growth+maintenance, NUT2) and three levels of Haemonchus contortus burden (0, 500 and 2000 larvae administered every 2 weeks: WO, W500 and W2000, respectively) on weight, feed intake, level of infection and packed cell volume (PCV). The rationale for the experimental design was based on the lack of information concerning the interaction between nutritional status and worm burden. Results indicated significant effects of worm burden levels on PCV, faecal egg contents (eggs per gram of feces (EPG), actual worm numbers, feed intake and efficiency of feed utilization. Nutrition X worm burden interactions were also significant for PCV and EPG. However, the differences detected for PCV and actual worm numbers did not translate into large or consistent differences in body weight. Goats on NUT2, after an initial period, showed little difference in body weight, irrespective of worm burden. Within the NUTI level, WO kids weighed more than W500 or W2000 kids throughout the study. Although not statistically significant, this constitutes a trend towards an interaction between nutrition and worm burden. ln both nutrition levels, there were no body weight differences between W500 and W2000 until the last 14 days. Feed intake was depressed in the first 3 months of... Mostrar Tudo |
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Palavras-Chave: |
Animal disorders; Endoparasita; Endoparasite; Faeces; Feeding; Growth; Haematocrit; Hematócrito; Parâmetro clínico. |
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Thesagro: |
Alimentação; Caprino; Fezes; Nutrição animal; Parasitismo; Parasitologia. |
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Thesaurus NAL: |
Animal diseases; Animal nutrition; Goats; Parasitism; Parasitology; Weight Gain. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 03115naa a2200445 a 4500
001 1514118
005 2015-03-18
008 1991 bl uuuu u00u1 u #d
100 1 $aBLACKBURN, H. D.
245 $aInteraction of parasitism and nutrition and their effects on production and clinical parameters in goats.
260 $c1991
520 $aAbstract: Weaned wether goals (n=144) approximately 6.months of age were placed in a 2x3 factorial design experiment for 5 months to test the main effects and interaction of two levels of nutrition (growth+maintenance, NUTl; twice growth+maintenance, NUT2) and three levels of Haemonchus contortus burden (0, 500 and 2000 larvae administered every 2 weeks: WO, W500 and W2000, respectively) on weight, feed intake, level of infection and packed cell volume (PCV). The rationale for the experimental design was based on the lack of information concerning the interaction between nutritional status and worm burden. Results indicated significant effects of worm burden levels on PCV, faecal egg contents (eggs per gram of feces (EPG), actual worm numbers, feed intake and efficiency of feed utilization. Nutrition X worm burden interactions were also significant for PCV and EPG. However, the differences detected for PCV and actual worm numbers did not translate into large or consistent differences in body weight. Goats on NUT2, after an initial period, showed little difference in body weight, irrespective of worm burden. Within the NUTI level, WO kids weighed more than W500 or W2000 kids throughout the study. Although not statistically significant, this constitutes a trend towards an interaction between nutrition and worm burden. ln both nutrition levels, there were no body weight differences between W500 and W2000 until the last 14 days. Feed intake was depressed in the first 3 months of the experiment for infected animais, but was subsequently followed by a compensatory reaction. Lower establishment rates, based on actual worm counts, were observed for the higher infection level, but in both infection levels establishment rates tended to decrease with time. Nutrition was found to be more important to counteract the consequences of a parasitic infection than to counteract the establishment of that same infection.
650 $aAnimal diseases
650 $aAnimal nutrition
650 $aGoats
650 $aParasitism
650 $aParasitology
650 $aWeight Gain
650 $aAlimentação
650 $aCaprino
650 $aFezes
650 $aNutrição animal
650 $aParasitismo
650 $aParasitologia
653 $aAnimal disorders
653 $aEndoparasita
653 $aEndoparasite
653 $aFaeces
653 $aFeeding
653 $aGrowth
653 $aHaematocrit
653 $aHematócrito
653 $aParâmetro clínico
700 1 $aROCHA, J. L.
700 1 $aFIQUEIREDO, E. P.
700 1 $aBERNE, M. E.
700 1 $aVIEIRA, L. da S.
700 1 $aCAVALCANTE, A. C. R.
700 1 $aROSA, J. S.
773 $tVeterinary Parasitology, Amsterdam$gv. 40, n. 1/2, p. 99-112, 1991.
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