Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 3
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Carbohydrats, N, P and K status of developing rice (Oryza sativa L.) plants grown in the first and second crop seasons in Taiwan Taiwan Agricultural Research Institute
C.S. Chen; D.D. Huang; M.C. Shen; D. J. Liu; 陳建山; 黃定鼎; 沈美珍; 劉大江.
[[abstract]]Concentrations of total nonstructural carbohydrates, N, P and K in different plant parts of rice were analyzed at stages of plant development. Differences between crop seasons were also studied to investigate the physiological causes of low yield of the second crop rice. Accumulation of total nonstructural carbohydrates (TNC) in cuims and leaf sheaths was most evident during the period of panicle development. Highest TNC concentration was recorded earlier in the second crop (25 days before heading) than in the first crop (18 days before hea(S)ding) for rices grown in Taichung. It occurred at heading stage in both crops in Taipei area. The first crop rice accumulated significantly higher amount of TNC in culms at panicle emergence than the...
Palavras-chave: [[classification]]6.
Ano: 1980
Imagem não selecionada

Imprime registro no formato completo
Nitrogen distribution and N2-fixing activity of developing soybean (Glycine max (L.) Merrill) Plants Taiwan Agricultural Research Institute
D.D. Huang; M.C.Shen; C.S. Chen; D.J. Liu; 黃定鼎; 沈美珍; 陳建山; 劉大江.
[[abstract]]Field experiments were conducted to investigate the distribution of N and the specific activity of N2-fixation of soybeans at successive stages of plant development. Nitrogen concentration in leaf blades was consistently higher than those in leaf petioles, stems and roots. Concentration in each plant part, except the seeds, usually decreased as the season progressed. However, N in leaf blades showed a sudden decline at V7 stage and an increase later at R2 stage. Pattern of changes in N in plant parts from different varieties usually was similar. During the pod-filling period (R4-R6), N was redistributed to seeds from vegetative tissues. Shih-Shih and Kaohsiung No. 3 maintained a higher level of N in leaf blades in this period as compared...
Palavras-chave: [[classification]]6.
Ano: 1980
Imagem não selecionada

Imprime registro no formato completo
溫度對直播水稻分蘗特性與成熟生理之影響 Taiwan Agricultural Research Institute
陳建山; 劉大江; Chein-Shan Chen; Dah-Jiang Liu.
[[abstract]]本試驗之目的在探討溫度對直播水稻之開始分蘗節位及成熟期地上部碳水化台物含量之影響,以提供本省二期稻作穗數與結實率減低原因之參考。試驗採用臺中秈2 號與臺南5 號二水稻品種,從播種至成熟期間在人工控制氣候室之玻璃室內,按最高分蘗期、孕穗期及抽穗期,分別給予如下三種日/夜溫度轉換處理:30 / 25 → 25 / 20 → 20 / 15℃ , 25 / 20 → 30 / 25 → 30 / 25℃,與20 / 15 → 25 / 20 → 30 / 25℃,結果摘要如下: 1. 直播水稻之開始分蘗節位在主稈第2 或第3 節位。低溫(20 / 15℃)生長之直播水稻開始分蘗節位,比高溫(30 / 25℃)或中溫(25 / 20℃)提高,品種間,稉稻又比秈稻高,唯品種或處理間穗數之差異概不顯著。 2. 不同品種或處理之葉綠素濃度皆自最高分蘗期後逐漸下降,而由高溫降至低溫處理之水稻,葉綠素含量自孕穗期起,顯著地比其他處理為低。 3. 在葉或稈和葉鞘的非構造性碳水化合物,由高溫降至低溫之處理,自孕穗期起,含量逐慚上升,但另二個溫度處理,在成熟期變化較少,含量亦較前者低,兩品種的變化趨勢相同。 4. 在低溫成熟水稻之千粒重與結實百分率最差,推究原因,可能因低溫影響光合作用器官功能與光合成產物轉流受阻礙的緣故。 有鑑於此,直播密植栽培有能力補償高溫對分蘗的影響,有利於在二期稻作推廣栽培,而為避兄低溫影響二期稻作的結實率,推廣早熟稻亦是值得嘗試的途徑。 The purpose of this study was to elucidate the effects of temperature on the nodeposition of the first-emerged...
Palavras-chave: [[classification]]6.
Ano: 1979
Registros recuperados: 3
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional