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Axillary bud viability and dry matter production of Poa ligularis in Patagonian grasslands: (with 1 table & 4 figures) Phyton
Souto,CP; Becker,GF; Siffredi,GL; Busso,CA; Sternberg,M.
Poa ligularis Nees is one of the dominant perennial grass species in Patagonian grasslands. This is the first field study which investigated the effects of defoliation frequency on its number of viable axillary buds, and subsequent dry matter production during one growing season. Experiments were arranged in a randomized complete block design. Treatments included one defoliation height (10 cm), from one to five times a year, and undefoliated controls. Bud respiratory activity was examined usingthe tetrazolium test and the vital stain Evan's blue. At the end of the growing season, plants that have been defoliated more than three times showed significatively (p<0.05) lower number of respiratory active buds than unclipped controls. A high defoliation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Defoliation; Poa ligularis; Axillary buds; Semiarid Argentina; Dry matter production; Patagonia.
Ano: 2004 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100004
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Basal defoliation and their influence in agronomic and phytopathological traits in tomato plants Horticultura Brasileira
Silva,Laércio J da; Milagres,Carla do C; Silva,Derly José H da; Nick,Carlos; Castro,João Paulo A de.
The incidence of leaf diseases is one of the main factors limiting the tomato crop production, increasing the production cost due to excessive pesticide application. The basal leaf removal could reduce inoculum sources, disease severity and contribute to reducing the use of pesticide. Aiming to evaluate the efficiency of this practice on the reduction of tomato leaf diseases and the effect in the quality and in the productivity of the tomato plants for in natura consumption, two experiments were carried out to test four levels of basal leaf removal. Basal leaves removal, at fruit harvesting, is efficient in reducing the infected plant area by disease, what can mean smaller disease severity and least inoculum source in the field. Also, the all basal leaf...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lycopersicon esculentum; Defoliation; Plant disease; Cultural management.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000300020
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Dinámica de crecimiento de cultivares de Urochloa brizantha Kunth. y Megathyrsus maximus (Simon & Jacobs), a diferente frecuencia de corte. Colegio de Postgraduados
Joaquín Cancino, Santiago.
El objetivo del estudio fue determinar la producción estacional y anual de forraje, composición morfológica, características estructurales y dinámica de ahijamiento de praderas de pasto Insurgente, Toledo, Tanzania y Mombaza, cosechados a tres frecuencias de corte (FC; 4, 5 y 6 semanas), durante las épocas de nortes, sequía y lluvias. Se utilizó un diseño de bloques completos al zar, con cuatro repeticiones y arreglo de tratamientos en parcelas divididas, donde la parcela mayor fueron los cultivares y la menor las frecuencias de corte. Los cultivares se sembraron a distancia de 50 x 50 cm entre plantas y surcos, respectivamente. El tamaño de parcelas fue de 10 m2. El área de muestreo fueron los dos surcos centrales, los cuales se dividieron en 3...
Palavras-chave: Pastos tropicales; Defoliación; Acumulación de forraje; Ahijamiento; Tropical grasses; Defoliation; Herbage accumulation; Tillering; Ganadería; Doctorado.
Ano: 2014 URL: http://hdl.handle.net/10521/2349
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Dinámica de microorganismos rizosféricos y filosféricos de Annona diversifolia Saff. Como respuesta a la estacionalidad, fenología y defoliación en el trópico seco Colegio de Postgraduados
Cortés Sarabia, Jazmín.
La ilama es una planta frutícola tropical, cuya distribución se encuentra restringida a México, Centroamérica y parte de Sudamérica y cuyo cultivo es de importancia local. Dado el escaso conocimiento sobre la dinámica microbiana en este tipo de cultivo, este estudio tuvo como objetivo evaluar el efecto de la estacionalidad, fenología y defoliación sobre la dinámica poblacional microbiana en filósfera y rizosfera de plantas de ilama (Annona diversifolia Saff.), en campo e invernadero. Se evaluaron plantas de tres edades en cuatro épocas del año en San Antonio de las Huertas, Guerrero. Se evaluaron las unidades formadoras de colonias (UFC) de hongos, actinomicetos, bacterias totales así como bacterias fijadoras de nitrógeno pertenecientes a los...
Tipo: Tesis Palavras-chave: Bacterias fijadoras de nitrógeno; Bacterias solubilizadoras de fosfatos; Fenología; Estacionalidad; Defoliación; Micorriza arbuscular; Maestría; Edafología; Nitrogen-fixing bacteria; Solubilizing phosphate bacteria; Phenology; Seasonality; Defoliation; Arbuscular mycorrhizae.
Ano: 2008 URL: http://hdl.handle.net/10521/1267
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Diversidad de hongos micorrízicos arbusculares y su interacción con factores ambientales y fisiológicos en la producción de plántulas de caoba (Swietenia macrophylla King.) Colegio de Postgraduados
Rodríguez Morelos, Víctor Hugo.
Aunque se conoce la importancia de las asociaciones micorrízicas, en las regiones tropicales, los estudios sobre la diversidad y funcionamiento de los hongos micorrízicos arbusculares (HMA) son escasos, especialmente en meliáceas nativas del neotrópico como la caoba (Swietenia macrophylla King) la cual es la especie maderable de mayor valor económico en Latinoamérica. En vivero, las prácticas de manejo pueden afectar la calidad de las plantas producidas para actividades de reforestación. Bajo este contexto, en este estudio se identificó la situación actual de los sistemas de producción de plántulas de caoba en viveros oficiales en el estado de Veracruz. También se identificaron las especies de HMA asociadas a la rizósfera de plántulas y árboles maduros de...
Palavras-chave: Micorrización; Árboles tropicales; Meliáceas; Inóculo micorrízico; Defoliación; Micorrhizal; Tropical tress; Meliaceae; Micorrizhal inoculums; Defoliation; Maestría; Agroecosistemas tropicales.
Ano: 2010 URL: http://hdl.handle.net/10521/463
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Efecto de la micorrización y defoliación en la tasa de crecimiento de cedro rojo (Cedrela odorata L.) y diagnóstico de plantaciones Colegio de Postgraduados
Oros Ortega, Iván.
En plántulas de C. odorata cultivadas en vivero se evaluó el efecto de seis tratamientos (TS) en la tasa de crecimiento en altura (TCA), diámetro (TCD) y tasa de crecimiento relativo (TCR), peso fresco y seco de las plántulas. Se utilizó un diseño completamente al azar con un arreglo factorial (2 x 3), los TS consistieron de una combinación de los factores: porcentaje de defoliación (0, 50 y 90) e inoculación con Glomus intraradices (con y sin inoculación). Además, se diagnosticó el estado actual de plantaciones de cedro en la zona de influencia del Campus Veracruz a través de una apreciación rural rápida. A los seis meses del experimento plantas de TS con inoculación, independientemente del nivel de defoliación, presentaron mayor TCD (F= 100.45,...
Tipo: Tesis Palavras-chave: Cedrela odorata; Micorriza arbuscular; Glomus intraradices; Defoliación; Maestría; Agroecosistemas Tropicales; Arbuscular mycorrhiza; Defoliation.
Ano: 2009 URL: http://hdl.handle.net/10521/1590
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Efeito de inseticidas aplicados nas sementes de soja sobre a mortalidade e consumo foliar de lagartas desfolhadoras. Infoteca-e
VIEIRA, E. C. de S.; VIEIRA, M. C. de S.; SILVA, P. G.; AVILA, C. J.; VIVAN, L. M..
bitstream/item/189928/1/ORAL10.pdf
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Chrysodeixis includens; Lepdoptera; Inseticida; Semente; Lagarta; Controle Químico; Desfolha; Anticarsia Gemmatalis; Soybeans; Insecticides; Chemical control; Defoliation; Entomology.
Ano: 2018 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103242
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ETHEPHON SPRAYS AS A DEFOLIANT IN ‘NIAGARA ROSADA’ VINE SUBJECTED TO TWO CROP PRODUCTION PER YEAR Rev. Bras. Frutic.
COSTA,THIAGO VIEIRA DA; FAÇANHA,RAFAELA VIEIRA; SCARPARE FILHO,JOÃO ALEXIO.
ABSTRACT In climate region Cwa of the State of São Paulo the technique of double cropping the grapevine is possible, however, when it is time for the second pruning of the crop, most of the vine’s leaves are still in the plant, posing the problem that the use of ethephon as a defoliant could increase leaf senescence and improve the vine management. The objective of this study was to evaluate the effects of ethephon spray as a defoliant in the development and production of the ‘Niagara Rosada’ vine when subjected to double cropping, and the influence this bioactivator may have on carbohydrate reserves in the branch. The experiments were conducted in a commercial, non-irrigated area in agricultural years of 2011/2012 and 2012/2013. The length, diameter and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis labrusca L.; Pruning; Defoliation; Carbohydrate reserves.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200201
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Feeding preferences of the willow sawfl y Nematus oligospilus (Hymenoptera: Tenthredinidae) for commercial Salix clones Rev. Soc. Entomol. Argent.
Loetti,Verónica; Rubio,Alejandra; Bellocq,María Isabel.
Nematus oligospilus Förster (Hymenoptera: Tenthredinidae) is a willow sawfly native to the Northern Hemisphere which became a serious defoliator in willow plantations (Salix spp.) of the Southern Hemisphere after being introduced in the early 1980´s. Studies on host preferences provide useful information for the development of pest management strategies where the willow sawfly may produce tree damage and economic loss. Feeding preferences of N. oligospilus larvae were evaluated in laboratory trials by simultaneously offering leaves from four willow tree clones commonly used in commercial plantations in Argentina (Salix babylonica var sacramenta Hortus, Salix nigra Marsch., S. babylonica L. x Salix alba L. 131-27 and Salix matsudana Koidz. x S. alba L....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Defoliation; Herbivory; Salicaceae; Willow sawfly.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802012000100014
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New host-plant records for the defoliator Ormiscodes amphimone (Fabricius) (Lepidoptera: Saturniidae) Neotropical Entomology
Paritsis,Juan; Elgueta,Mario; Quintero,Carolina; Veblen,Thomas T.
Ormiscodes amphimone (Fabricius) is a phytophagous moth species known to severely defoliate woody species in Chile and Argentina. Here we document new records of O. amphimonehost associations emphasizing the role of Nothofagus pumilio as its primary host in our study area. This new record for Argentina is highly significant given the economic importance of N. pumilio as a timber resource and the potential of O. amphimone to generate extensive outbreaks.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Defoliation; Hemileucinae; Herbivory; Insect outbreak; Nothofagus pumilio; Patagonia.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600032
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Níveis de desfolha tolerados na cultura da soja sem a ocorrência de prejuízos à produtividade. Infoteca-e
BUENO, A. de F.; BATISTELA, M. J.; MOSCARDI, F.; BUENO, R. C. O. de F.; NISHIKAWA, M.; HIDALGO, G.; SILVA, L.; GARCIA, A.; CORBO, E.; SILVA, R. B..
Nível de ação e o MIP-Soja. Ensaios com injúria na fase inicial da lavoura: Londrina, PR ? Safras 2001/2002 e 2002/2003. Ensaios com diferentes níveis de desfolha em diferentes fases do desenvolvimento: Não-Me-Toque-RS e Sorriso-MT ? Safra 2008/2009. Ensaios com diferentes níveis de desfolha contínua durante diferentes fases do desenvolvimento: Morrinhos, GO ? Safra 2009/2010. Resultados obtidos que comprovam a segurança dos níveis de ação recomendados. Considerações finais.
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Soja; Desfolha; Soybeans; Defoliation.
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/859415
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Onion yield as affected by plant density, nitrogen level and loss of leaf area Phyton
Siliquini,OA; Orioli,GA; Lobartini,JC.
Onion (Allium cepa) is an important horticulture crop because of its value as a food with a long shelf life being a relatively non-perishable product. It is very helpful to understand the growth response of the seeded onion crop to conduct appropriate field practices in attaining the highest or optimum yields. A three year field experiment was conducted using a variety of onion Valcatorce INTA, in a randomized block design with five replicates. Treatments were two plant densities and three rates of N application. The bulb growth followed a classical sigmoid curve. During the rapid growing period, the crop had the greatest leaf area (LA) with at least six leaves per plant. Increasing plant density increased yield in kg/ha, but decreased bulb size....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Defoliation; Bulb production; Onion fertilization.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000200011
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Primeiro relato de Sphacelodes vulneraria (Lepidoptera: Geometridae) danificando Hovenia dulcis no Brazil PFB - Pesquisa Florestal Brasileira
Prado Ribeiro, Leandro; Corrêa, Camila; Vargas Castilhos, Rodolfo.
Hovenia dulcis Thunb. (Rhamnaceae), conhecida popularmente como uva-do-japão, é comumente utilizada para sombreamento de aviários e chiqueiros no Sul do Brasil. É relatada pela primeira vez no Brasil a ocorrência de Sphacelodes vulneraria (Hübner, 1823) (Lepidoptera: Geometridae: Ennominae) danificando árvores de H. dulcis, e o seu potencial como nova praga desta espécie florestal.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Uva- do-japão; Desfolha; Pragas florestais Entomology Japanese raisin tree; Defoliation; Forest pests.
Ano: 2017 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1209
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Quantitative analysis of two important epidemiological features of the common bean: Phaeoisariopsis griseola pathosystem Trop. Plant Pathol.
Willocquet,Laetitia; Allorent,Delphine; Savary,Serge.
This work quantifies two important epidemiological features of the bean (Phaseolus vulgaris)/Phaeoisariopsis griseola pathosystem. The first is the effect of the number of nights of leaf wetness on infection efficiency. Infection efficiency was below 10% when inoculated leaflets were exposed to less than two nights of leaf wetness. Optimum infection efficiencies were obtained after three to four nights of leaf wetness, at about 50%. Further nights of leaf wetness did not increase the infection efficiency. The second feature quantified is the relative rate of leaflet defoliation for varying levels of angular leaf spot severity. It increased with disease severity according to a logarithm-like curve, and a relative rate of 0.23 day-1 was estimated for a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epidemiology; Angular leaf spot; Phaseolus vulgaris; Infection efficiency; Defoliation; Leaf wetness; Monocycle process.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000600015
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Role of nonproductive tillers as transient sinks of assimilates in wheat Bragantia
Fioreze,Samuel Luiz; Michelon,Luiz Henrique; Turek,Thaís Lemos; Drun,Robson Pelissari; Dalorsaleta,Julio César Sbardella.
ABSTRACT Although source–sink relationships in wheat are well studied, the performance of tillers as transient sinks is still unclear, especially under stress conditions. Thus, this work aimed to study the yield relationships of wheat stems in contrasting genotypes as affected by tiller treatment under stress conditions. Two experiments were conducted under greenhouse conditions using BRS Guamirim (high tillering) and BRS Parrudo (low tillering) wheat cultivars. Four tillering treatments were applied on late tillers in the first growing season (2016) and three in the second (2017): (i) free-tillering, (ii) detillering, (iii) physical suppression (only in the first season) and (iv) “spikes removal”. The main stem and the first four emitted tillers were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Source–sink relationship; Tillering; Drought stress; Defoliation.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020005004203
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Tiller emission and dry mass accumulation of wheat cultivars under stress Scientia Agricola
Almeida,Milton Luiz de; Sangoi,Luís; Merotto Jr.,Aldo; Alves,Antônio Carlos; Nava,Itamar Cristiano; Knopp,Armando Cristiano.
Tillers are important structures for wheat (Triticum aestivum L.) because they contribute to increase the number of spikes per area, enhancing grain yield. Stresses during plants early growth have a sizable effect on tiller production. Three experiments were conducted to evaluate the effects of stresses induced by unevenness in sowing depth, defoliation and differences in soil pH on tiller emission and dry mass accumulation of wheat cultivars. The experiments were carried out in Lages, Southern Brazil, during the winter growing seasons of 2000 and 2001. They were performed in square boxes, under natural conditions of radiation and irrigation. In the first experiment, five types of sowing depths were tested to simulate different systems of unevenness in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum L.; Tillering; Sowing depth; Defoliation; Aluminum.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300004
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Uso de desfolhantes no manejo da indução da brotação em pinheira. Infoteca-e
HAWERROTH, F. J.; MARTINS, M. V. V.; AZEVEDO, A. E. C..
bitstream/item/103335/1/BPD13013.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Pinheira; Escalonamento de produção; Production scheduling.; Annona Squamosa; Desfolha; Fenologia.; Defoliation; Phenology..
Ano: 2013 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/982441
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不同時期的乾旱處理及除葉對梨樹碳水化合物含量及枝梢形成之影響 Taiwan Agricultural Research Institute
施昭彰; 向為民; J. C. Shih; W. M. Hsiang.
[[abstract]]梨低需冷性新品系′SH–085′嫁接於鳥梨砧木上於遮雨的環境下種於栽培槽中,於由長日開始轉變為短日後的三個不同時期進行兩種不同乾濕程度的水分管理,而後於78年10月19日、11月3日、11月16日及12月1日分別取樣及除葉後再以高土壤水分含量(-0.01MPa~-0.05MPa)處理,觀察枝梢再生長及開花結果之情形並分析不同時期碳水化合物蓄積之情形。第二年短果枝數的形成與處理之間有特定的關係存在。後期的乾旱處理有利於澱粉在枝條及根部的累積,山梨糖醇在各處理及各植株部位皆有不同的量存在,但其含量與處理間無明顯的關係,葡萄糖與果糖主要存在於葉部,在枝條含量很少,僅在根部還有少量存在,在完全乾旱的處理甚至不存在,蔗糖普遍存在於葉片及根中,在十月底之前幾不存在於枝條中,可見葡萄糖及果糖乃是充當碳水化合物累積過程的中間代謝產物,碳水化合物的貯藏主要是以山梨糖醇、蔗糖及澱粉的形式存在。 Pear clone with low-chilling requirement ′SH-085′ were planted in containers under shelter, after being grafted on bird pear rootstocks. Two soil water status treatments were undertaken at three different stages after entering short days. Sampling and defoliation were done respectively on Oct. 19, Nov. 3, Nov. 16 and Dec. 1. And then the defoliated plants...
Palavras-chave: 低需冷品系; 除葉; 水分管理; 山梨糖醇; 澱粉; 葡萄糖; 果糖; 蔗糖 Low chill cultivar; Defoliation; Water management; Sorbitol; Starch; Glucose; Fructose; Sucrose [[classification]]6.
Ano: 1993
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加工番石榴產期調節方法之研究 Taiwan Agricultural Research Institute
王武彰; U.C. Wang.
[[abstract]]本試驗以中山月拔五、六年生植株為供試材料,以尿素(46%)及益收生長素(39.5%)等二種藥劑噴施,二年試驗結果,發現在不同氣候環境下各處理間對促進落葉效果與產量有關。尿素25%試區,落葉率高,枝條損傷嚴重,影響萌芽及產量,而以尿素6.25%處理區較適宜,產量也高,平均落葉率達36.1%,新梢乾枯20.3公分,處理後12─14天即可萌芽,單株產量達39.8公斤,果粒重94.8公克,處理間增產45─51%。品質差異不甚顯著。 In this study, the processing Guava, Five or six years old of Chung Sun Yueh Pa, and two chemicals, 46% Urea and 39.5% Ethrel, were used. The results from two-year experiments revealed that different applicationtimings and chemical concentrat onis were closely related to defoliation and production of processing guava under different climate conditions. New shoots were caused severe defoliation and injury, and productivity was also low when 25% urea was applied. 6.25% urea was the best concentration with 36.1% defoliation and only...
Palavras-chave: 番石榴; 尿素; 益收; 落葉; 產期; 產量; 果實品質 Guava; Urea; Ethel; Defoliation; Harvesting; Period; Productivity; Fruit quality [[classification]]15.
Ano: 1989
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文心蘭之健康管理 Taiwan Agricultural Research Institute
張朝晏; Chao-Yan Chang.
[[abstract]]文心蘭(Oncidium spp.)屬於蘭科,文心蘭屬。其原生於熱帶美洲的墨西哥、 巴西、玻利維亞一帶的複莖地生蘭或著生蘭,屬C3 型作物,其原種大約在七百 種以上,大部份原產於熱帶美洲,主要分布在美國佛羅里達州、墨西哥、巴拉圭、 祕魯、巴西、阿根廷等國,由平地到海拔2000 公尺以上的冷涼高地都有其蹤跡, 各原種之生態習性變化很大。目前本省經濟生產的文心蘭,不論是切花或盆花, 大都是經過雜交育種選拔出來的品種。國內於民國六十五年自泰國引進切花品種 南西(Onc. Gower Ramsey)。其表現在台灣深受栽培者肯定,且民國八十年代切花 輸出日本後,年年劇增。因此栽培面積自現今已達300 公頃以上。2007 年種植 面積已超過200 公頃輸日量達2064 萬枝占日本文心蘭輸入量87.6%。以單一品 種,單一花色,單一市場之出口量,已是花卉產業的奇蹟。然而生產量雖具有舉 足輕重之影響力,但因為產量集中於5~6 及9~ 10 月,造成輸入量過多而價格崩 盤。且因目前栽培是以水平黑網之栽培模式,夏季受自然氣候影響甚大消費者反 應部分產品瓶插壽命較短。因此建立文心蘭健康栽培模式是當前相當重要的課 題。 Oncidium orchid, Oncidium spp., the genus Oncidium of the orchid family (Orchidaceae), are the native species of tropical America Mexico, Brazil and Bolivia .Most species in this genus are epiphytes or terrestrials with a sympodial growth habit...
Palavras-chave: 文心蘭; 開花; 光度; 溫度; 除葉; 假球莖 2009花卉健康管理研討會專刊 Oncidium spp.; Blooming; Lux; Temperature; Defoliation; Pseudobulbs Proceedings of the Symposium on Plant Health Management for Flower Crops [[classification]]13.
Ano: 2009
Registros recuperados: 20
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