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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: |
12/08/2016 |
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Data da última atualização: |
24/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
KLAUBERG, C.; VIDAL, E.; SILVA, C. A.; BENTES, M. de M.; HUDAK, A. T. |
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Afiliação: |
Carine Klauberg, ESALQ / USP / USDA Forest Service Rocky Mountain Research Station; EDSON VIDAL, USP / ESALQ; Carlos Alberto Silva, University of Idaho; MICHELLINY PINHEIRO DE MATOS BENTES, CPATU; Andrew Thomas Hudak, USDA Forest Service Rocky Mountain Research Station. |
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Título: |
Sampling methods for titica vine (Heteropsis spp.) inventory in a tropical forest. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Annals of Forest Science, v. 73, n. 3, p. 757-764, Sep. 2016. |
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DOI: |
10.1007/s13595-016-0565-2 |
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Idioma: |
Inglês |
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Conteúdo: |
Key message: Titica vine provides useful raw fiber material. Using sampling schemes that reduce sampling error can provide direction for sustainable forest management of this vine. Sampling systematically with rectangular plots (10 × 25 m) promoted lower error and greater accuracy in the inventory of titica vines in tropical rainforest. Context: The titica vine (Heteropsis spp.) is an important raw material for native communities located in the Amazon tropical rainforest. However, variability and spatial distribution of this species are some factors that hinder the assessment of accurate productivity prediction, and thus, inventory methods for management plan must be defined. Aims: The aim of this study was to develop and compare accuracy of different sampling approaches for the inventory of titica vines (roots ha−1) using simulations based on field data. Methods: Eighty-eight treatments were defined by the combination of the process (random or systematic), sampling intensity (5, 10, 15, and 20 % of 18 ha), plot size (250 to 3000 m2) and shapes (square, rectangle, and transect). Production estimate, sampling error, and relative efficiency were used to compare treatments with each other and with the reference inventory. Results: The mean production estimates for the random and systematic processes were 570 and 597 vine roots ha−1, while the reference estimate was 500 vine roots ha−1. Among of the treatments evaluated, only 5.8 % of them provided a sampling error less than 15 %. Conclusion: The sampling procedure that combines systematic or random process, plots sizes of 250 or 300 m2 and sampling intensity greater than 15 % was the most efficient for inventory of titica vine in tropical forests. MenosKey message: Titica vine provides useful raw fiber material. Using sampling schemes that reduce sampling error can provide direction for sustainable forest management of this vine. Sampling systematically with rectangular plots (10 × 25 m) promoted lower error and greater accuracy in the inventory of titica vines in tropical rainforest. Context: The titica vine (Heteropsis spp.) is an important raw material for native communities located in the Amazon tropical rainforest. However, variability and spatial distribution of this species are some factors that hinder the assessment of accurate productivity prediction, and thus, inventory methods for management plan must be defined. Aims: The aim of this study was to develop and compare accuracy of different sampling approaches for the inventory of titica vines (roots ha−1) using simulations based on field data. Methods: Eighty-eight treatments were defined by the combination of the process (random or systematic), sampling intensity (5, 10, 15, and 20 % of 18 ha), plot size (250 to 3000 m2) and shapes (square, rectangle, and transect). Production estimate, sampling error, and relative efficiency were used to compare treatments with each other and with the reference inventory. Results: The mean production estimates for the random and systematic processes were 570 and 597 vine roots ha−1, while the reference estimate was 500 vine roots ha−1. Among of the treatments evaluated, only 5.8 % of them provided ... Mostrar Tudo |
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Palavras-Chave: |
Cipó titica; Produto florestal não-madeireiro. |
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Thesagro: |
Floresta Tropical; Inventário. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02448naa a2200229 a 4500
001 2050825
005 2022-05-24
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s13595-016-0565-2$2DOI
100 1 $aKLAUBERG, C.
245 $aSampling methods for titica vine (Heteropsis spp.) inventory in a tropical forest.$h[electronic resource]
260 $c2016
520 $aKey message: Titica vine provides useful raw fiber material. Using sampling schemes that reduce sampling error can provide direction for sustainable forest management of this vine. Sampling systematically with rectangular plots (10 × 25 m) promoted lower error and greater accuracy in the inventory of titica vines in tropical rainforest. Context: The titica vine (Heteropsis spp.) is an important raw material for native communities located in the Amazon tropical rainforest. However, variability and spatial distribution of this species are some factors that hinder the assessment of accurate productivity prediction, and thus, inventory methods for management plan must be defined. Aims: The aim of this study was to develop and compare accuracy of different sampling approaches for the inventory of titica vines (roots ha−1) using simulations based on field data. Methods: Eighty-eight treatments were defined by the combination of the process (random or systematic), sampling intensity (5, 10, 15, and 20 % of 18 ha), plot size (250 to 3000 m2) and shapes (square, rectangle, and transect). Production estimate, sampling error, and relative efficiency were used to compare treatments with each other and with the reference inventory. Results: The mean production estimates for the random and systematic processes were 570 and 597 vine roots ha−1, while the reference estimate was 500 vine roots ha−1. Among of the treatments evaluated, only 5.8 % of them provided a sampling error less than 15 %. Conclusion: The sampling procedure that combines systematic or random process, plots sizes of 250 or 300 m2 and sampling intensity greater than 15 % was the most efficient for inventory of titica vine in tropical forests.
650 $aFloresta Tropical
650 $aInventário
653 $aCipó titica
653 $aProduto florestal não-madeireiro
700 1 $aVIDAL, E.
700 1 $aSILVA, C. A.
700 1 $aBENTES, M. de M.
700 1 $aHUDAK, A. T.
773 $tAnnals of Forest Science$gv. 73, n. 3, p. 757-764, Sep. 2016.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
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URL |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
21/10/2015 |
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Data da última atualização: |
26/09/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MENEZES, C. B.; SALDANHA, D. C.; SANTOS, C. V.; ANDRADE, L. C.; JULIO, M. P. M.; PORTUGAL, A. F.; TARDIN, F. D. |
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Afiliação: |
CICERO BESERRA DE MENEZES, CNPMS; FLAVIO DESSAUNE TARDIN, CNPMS. |
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Título: |
Evaluation of grain yield in sorghum hybrids under water stress. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Genetics and Molecular Research, Ribeirão Preto, v. 14, n. 4, p. 12675-12683, 2015. |
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DOI: |
10.4238/2015.October.19.11 |
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Idioma: |
Inglês |
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Conteúdo: |
Sorghum grain yield can be significantly affected by climatic changes, especially drought and high temperature. The purpose of this study was to evaluate hybrids of grain sorghum grown under normal irrigation conditions or water stress in order to select those likely to be more tolerant of drought. Forty-nine hybrids were grown in a randomized block design experiment, with three replications. The plots consisted of four rows of 5 m length. Grain yield, weight of 1000 grains, harvest index, days to flowering, and plant height were measured. All of these characteristics were affected by water stress; however, grain yield showed the largest relative reduction. Comparison of the various genotypes showed that some hybrids had an acceptable grain yield under water stress, and maintained a high average yield compared to growth without stress. Several hybrids gave better grain yield than commercial check cultivars: 1170090, 1170092, 1170064, 1167026, 1167064, 1170093, 1167008, 1167029, 0009061, 1167092, 1105647, and 1170019 stood out for their acceptable plant height, earliness, and higher productivity. |
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Thesagro: |
Resistência a seca; Sorghum bicolor; Variedade. |
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Thesaurus NAL: |
Drought tolerance; Plant breeding. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/131509/1/Evaluation-grain.pdf
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Marc: |
LEADER 01902naa a2200265 a 4500
001 2026894
005 2017-09-26
008 2015 bl uuuu u00u1 u #d
024 7 $a10.4238/2015.October.19.11$2DOI
100 1 $aMENEZES, C. B.
245 $aEvaluation of grain yield in sorghum hybrids under water stress.$h[electronic resource]
260 $c2015
520 $aSorghum grain yield can be significantly affected by climatic changes, especially drought and high temperature. The purpose of this study was to evaluate hybrids of grain sorghum grown under normal irrigation conditions or water stress in order to select those likely to be more tolerant of drought. Forty-nine hybrids were grown in a randomized block design experiment, with three replications. The plots consisted of four rows of 5 m length. Grain yield, weight of 1000 grains, harvest index, days to flowering, and plant height were measured. All of these characteristics were affected by water stress; however, grain yield showed the largest relative reduction. Comparison of the various genotypes showed that some hybrids had an acceptable grain yield under water stress, and maintained a high average yield compared to growth without stress. Several hybrids gave better grain yield than commercial check cultivars: 1170090, 1170092, 1170064, 1167026, 1167064, 1170093, 1167008, 1167029, 0009061, 1167092, 1105647, and 1170019 stood out for their acceptable plant height, earliness, and higher productivity.
650 $aDrought tolerance
650 $aPlant breeding
650 $aResistência a seca
650 $aSorghum bicolor
650 $aVariedade
700 1 $aSALDANHA, D. C.
700 1 $aSANTOS, C. V.
700 1 $aANDRADE, L. C.
700 1 $aJULIO, M. P. M.
700 1 $aPORTUGAL, A. F.
700 1 $aTARDIN, F. D.
773 $tGenetics and Molecular Research, Ribeirão Preto$gv. 14, n. 4, p. 12675-12683, 2015.
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Embrapa Milho e Sorgo (CNPMS) |
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