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Registros recuperados: 12
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Effects of plant spacing and N-fertilizer on crop yields, N2-Fixation, N-Transferred to corn, and carry-over effects of corn-groundnut intercrops Thai Agricultural
Amnat Suwanarit; Jitima Yathapootanont; Sodsai Changsaluk; Chairerk Suwannarat.
7 tables
Palavras-chave: Corn; Maize; Groundnuts; Plant spacing; N fertilizers; Yields; N2 fixation; N transfer; Cropping systems; Carry-over effect; ข้าวโพด; ถั่วลิสง; ระบบการปลูกพืช; ระยะปลูก; ปุ๋ยไนโตรเจน; ผลผลิต; การตรึงไนโตรเจน; การเคลื่อนย้ายไนโตรเจน.
Ano: 1989 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4354
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Effects of variety and plant spacing on weight, surface and yield of tobacco leaf (K326 and 347 Var.) CIGR Journal
Azadbakht, Mohsen; Ghajarjazi, Ehsan; Kiapei, Ali; Jafari, Hassan; Salehi, Ebrahim; Pishgar, Reza.
Tobacco is one of the important agricultural and industrial products which plays a crucial role in economics and income of the producing countries and tobacco’s leaves are actually used commercially. In this study, the effects of two tobacco varieties K326 and 347 in three plant spacing of 30, 40, and 50 cm (with density of 33333, 25000 and 20000 plants/ha) on physical properties and weight of tobacco leaves are discussed. The results of variance analysis showed that the ¬¬¬effects of variety and plant spacing on leaf surface in 5% level were significant. Interaction effect of these two factors wasn’t significant. Also results showed that independent and interaction effects of plant spacing and different varieties of tobacco on leaf weight were significant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tobacco; Plant spacing; Leaf; Weight; Yield.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3646
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Heliconia: rhizome propagation, shooting and clump area. Repositório Alice
LOGES, V.; COSTA, A. S.; GUIMARÃES, W. N. R.; LEITE, K. P.; CASTRO, A. C. R. de; CASTRO, M. F. A.; NOGUEIRA, L. C..
Heliconia cultivation is rapidly expanding in Brazil, mainly in the Northeast region. Usually, Heliconia rhizomes are directly transplanted to the field, which has been causing a high percentage of mortality, low shooting rates, and a long time to produce new shoots, depending on the genotype. This paper presents information on rhizome viability (RV), number of shoots per clump (NSC) during one year, and area occupied per clump (APC). The evaluations were carried out at the Heliconia Germplasm Collection of Federal Rural University of Pernambuco (UFRPE), Camaragibe - PE, Brazil. A randomized block design was used, with 30 treatments (genotypes) and 4 replications. The plant spacing was 3.0 m between plants in the rows and 4.0 m between rows. Differences...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Tropical floriculture; Pre-breeding; Rhizome viability; Shoot formation; Clump expansion; Plant spacing.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/901002
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Response to plant spacing of KU hybrid 2301 corn grown at different soil fertility levels Thai Agricultural
Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
1 ill., 2 tables
Palavras-chave: Corn; Maize; Hybrids; Plant spacing; Soil fertility; Growth; Yields; ข้าวโพด; ลูกผสม; ระยะปลูก; ระดับปุ๋ย.
Ano: 1985 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4595
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Soil humidity and evapotranspiration under three coffee (Coffea arabica L.) planting densities at Naranjal experimental station (Chinchiná, Caldas, Colombia) Acta Agron. (Palmira)
Bermúdez-Florez,Leidy Natalia; Cartagena-Valenzuela,José Régulo; Ramírez-Builes,Víctor Hugo.
Abstract Coffee cultivation depends on water supplied by rain or irrigation, which, in turn, affect productivity and harvest distribution. Knowing the influence of plant spacing on the behavior of soil moisture and water consumption, is likely to determine a crop’s planting density, fertilization and planting times, all based on regional water availability. In this context, the study was conducted at Naranjal Experimental Station, municipality of Chinchiná (Caldas, Colombia) at 04° 58’ N, 75° 39’ W; 1,381 m a.s.l., aimed to describe moisture performance in a coffee plantation established on an Andisol, under three planting densities. This was done by estimating the evapotranspiration (ETo) and assessing crop evapotranspiration...
Tipo: Journal article Palavras-chave: Plant spacing; Andisol; Soil moisture; Hydraulic conductivity.
Ano: 2018 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000300402
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Yield test of some sorghum varieties at different plant spacings Thai Agricultural
Pontip Chungmanoch; Teerasak Manupeerapan; Tip Lekagul; Chawana Boonreung.
1 table
Palavras-chave: Sorghum; Plant spacing; Yield test; Varieties; Yields; ข้าวฟ่าง; ระยะปลูก; การทดสอบผลผลิต.
Ano: 1975 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3828
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การทดสอบพันธุ์ข้าวโพดหวานกับระยะปลูกในไร่กสิกร ปี 2546 Thai Agricultural
Somchai Lim-aroon; Sodsai Changsaluk; Sumran Srichomporn; Kosol Kirdpoksub; Somchai Potisan.
6 tables
Palavras-chave: Corn; Maize; Sweet corn; Plant spacing; Yield trial; On farm research; ข้าวโพด; ข้าวโพดหวาน; ระยะปลูก; การทดสอบในไร่กสิกร.
Ano: 2004 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4222
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การวิเคราะห์ต้นทุนและผลตอบแทนการผลิตข้าวโพดเลี้ยงสัตว์จำแนกตามระยะปลูกในจังหวัดสระแก้ว ปีการเพาะปลูก 2545/46 Thai Agricultural
Sanit Kao-ian; Sarun Wattanutchariya.
4 tables
Palavras-chave: Corn; Maize; Cost of corn production; Return of corn production; Plant spacing; Economic analysis; ข้าวโพด; ข้าวโพดเลี้ยงสัตว์; ต้นทุน; ผลตอบแทน; ระยะปลูก.
Ano: 2004 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4235
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栽培密度對玉米生育及產量之影響Ⅱ.子粒充實期 Taiwan Agricultural Research Institute
姜義展; 魏夢麗; 陳烈夫; 劉大江; Yih-Jan Jiang; Meng-Li Wei; Lit-Fu Chan; Dah-Jiang Liu.
[[abstract]]本試驗採用玉米品種臺農一號為材料,以吐絲期具不同營養生長量但吐絲後具有相似生育環境之處理,探討子粒充實期間植株產量生理性狀表現。於1991及1992年秋作進行田間試驗,行距約為75cm,株距分為11與22cm兩種處理,第一年試驗於吐絲期將部份小區株距自11cm間拔為22cm,第二年於雄穗分化始期與吐絲期進行相同處理,又於吐絲期將部份小區株距自22cm間拔至44cm,分析子粒充實期間不同器官之乾物質與氮素累積性狀,解析對產量的影響。密植栽培降低植株在吐絲期之營養生長量;吐絲後如維持相同株距,則吐絲期營養生長量較低之處理,植株在子粒充實前期(吐絲後0~24日)及後期(48~65日)的單株乾物質生產量較高,但分配至子粒之比率則較低。子粒充實前期所生產的光合物質平均分配於子粒及果穗其他部位,器官間可能有競爭現象,以疏植區最為明顯。吐絲期營養生長量較低之植株於充實中期,及吐絲期營養生長量較高之植株於充實後期,其全株光合物質產量不足以供應子粒充實之需。在氮素累積性狀方面,吐絲期氮素累積量較低者,於子粒充實前期與中期(吐絲後24~48日)有較高的氮素同化能力。多數處理於子粒充實全期之全株氮素累積速率低於子粒氮素累積速率,以充實中期的差異最為顯著;但吐絲期營養生長量與氮素累積量最低之處理,可同化較多量氮素,反而表現較佳之供需平衡關係。玉米植株氮素利用效率因密植而升高,主要受氮素吸收效率影響。如吐絲期營養生長與氮素累積量不同,而吐絲後維持相同之行株距,其氮素利用效率與多數組成因子之表現並無顯著差異,顯示臺農一號玉米品種之氮素利用對栽培密度呈現較為穩定的反應。吐絲期乾物質與氮素累積量較低之處理,植株在吐絲後具有較高的光合物質與氮素同化作用能力,對子粒產量具有明顯的補償及緩衝作用。
Palavras-chave: 玉米 栽培密度 子粒充實 乾物質累積 氮素累積 氮素利用 Zea mays; Plant spacing; Kernel-filling; Dry matter accumulation; N accumulation; N use efficiency [[classification]]6.
Ano: 1995
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栽培密度對玉米生育及產量之影響Ⅰ.營養生長期 Taiwan Agricultural Research Institute
魏夢麗; 陳烈夫; 姜義展; 劉大江; Meng-Li Wei; Lit-Fu Chan; Yih-Jan Jiang; Dah-Jiang Liu.
[[abstract]]玉米吐絲前的營養生長可能影響子粒產量表現,本試驗以玉米品種臺農一號為材料,調查營養生長期間植株物質與氮素的累積與分配性狀,同時探討栽培密度的作用,以對其產量生理有進一步的瞭解。於1991及1992年秋作進行試驗,行距均為75cm,1991年採用株距11、22及44cm三種處理,1992年採用11與22cm兩種株距,又於雄穗分化始期將部份植株株距自11cm間拔為22cm;在播種至吐絲期間連續取樣,分析不同器官之乾物質與氮素累積性狀。自第十二葉齡以後,栽培密度對臺農一號單株乾物質及氮素累積能力的影響方較明顯,葉片乾物質與氮素含量佔全株總量的比值快速下降,而莖稈乾物質與氮素含量佔全株總量的比值相對快速升高。玉米植株在第十二葉期至吐絲期約一個月生育期間,具有極旺盛的同化作用,植株所累積的乾物質量佔吐絲期總乾物量的80~92%,所累積的氮素量佔吐絲期總含氮量的69~85%,於密度處理間比較,則以最密植處理之比值較低。玉米植株自播種至吐絲期,生長速率持續上升,尤以吐絲前約二週之速率最高,乾物質累積速率最高可達389 kg/ha.day,氮素累積速率最高達6.4kg/ha.day,隨株距之增加而顯著降低。在營養生長全期,乾物質累積速率與氮素累積速率的比值有逐漸上升的趨勢,但在栽培密度處理間則多無顯著差異,顯示以單位氮素為基準的乾物質累積速率,在不同生育階段雖然有異,但在本試驗栽培密度條件下,並不受環境因子的環境。
Palavras-chave: 玉米 栽培密度 營養生長 乾物質累積 氮素累積 Zea mays; Plant spacing; Vegetative growth; Dry matter accumulation; N accumulation [[classification]]6.
Ano: 1995
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栽培密度與氮素追肥施用量對葉用甘藷產量之影響 Taiwan Agricultural Research Institute
利幸貞; 賴永昌; 陳一心; Hsin-Chen Lee;Yung-Chang Lai;Yi-Sin Chen.
[[abstract]]本試驗以葉用甘藷地方品種雍菜種為試驗材料,分別於1994年及1995年5月~8月在嘉義分所試驗田進行探討栽培密度與氮素追肥施用量對其生育及產量的影響。1994年試驗期間,因考慮其枝蔓倒伏,不易採收,於每次採收後即進行強剪,卻造成植株枝蔓老化,生長勢減弱,因此於1995年將方法加以修正,不再進行強剪處理,以利枝蔓生育。1994年之試驗結果栽培密度的影響,其株距30cm有利於頂芽數、頂芽重及徑寬的增加,20、25cm處理間則差異不顯著;對頂芽長、葉片數及葉面積無顯著影響。密植(株距20cm)可提高初期之小區產量,後期則三種密度間差異均不顯著。1995年之試驗結果顯示頂芽重、葉片數及葉面積均不受栽培密度影響,而頂芽長與徑寬在後期以30cm處理較佳;其小區產量不論何種栽培密度均無差異。1994年試驗結果顯示氮素追肥施用量30kg/ha能提高葉用甘藷之頂芽數、頂芽重、葉片數及葉面積,但對頂芽長及徑寬無顯著影響,小區產量則明顯因增施氮素追肥而增加。1995年的試驗結果,施用30kg/ha氮素追肥除葉片數無影響外,其他性狀如頂芽重、頂芽長、徑寬及葉面積均有顯著效果,且小區產量也以30kg/ha處理最高,施用10kg/ha之氮素追肥對增產效果較小而不具經濟效益。1994年試驗植株因採收後進行強剪,造成枝蔓老化,生長勢衰弱,使其產量隨著採收次數增加而漸減,1995年試驗則令植株枝蔓充分生長,匍匐畦面,具有較多的新生根系及新芽節位,因此不受採收次數之影響,產量能穩定的上升。
Palavras-chave: 葉用甘藷 栽培密度 氮素追肥施用量 產量及產量構成因素 Leaf vegetable sweet potato; Plant spacing; Nitrogen fertilization; Yield; Yield components [[classification]]29.
Ano: 2006
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玉米營養生長期光合物質及氮素累積性狀與產量間關係之研究 Taiwan Agricultural Research Institute
魏夢麗; 姜義展; 陳烈夫; 劉大江; Meng-Li Wei; Yih-Jan Jiang; Lit-Fu Chan; Dah-Jiang Liu.
[[abstract]]本計畫以玉米臺農一號為材料,於1991至1993年秋作進行田間試驗,試驗田區土壤為坋質壤土,前作均為水稻。在玉米播種至吐絲期間施以變化栽培密度處理,試圖改變植株在吐絲期之乾物質與氮素累積量,藉以探討吐絲期以前之營養生長對產量性狀的影響。試驗之行距均為75 cm,播種時株距為11與22 cm,分別在雄穗分化始期或吐絲期進行間拔,使部份小區株距增為22 cm。玉米單株產量因密植而降低,但單位面積產量則增高;比較吐絲期開始株距均為22 cm之三項處理,雖然在吐絲期的單株乾物質與氮素含量明顯的以播種後即維持22 cm株距者為高,但子粒產量多無顯著差異,一穗粒數與平均百粒重對密度處理未呈現一定反應,兩項產量構成要素並表現互補效應。玉米植株自雄穗分化始期至吐絲期之日數,約為全生育期的四分之一,此一期間所累積的乾物質可佔成熟期總乾物量的25.3─43.1%,所累積的氮素量更高達總氮素含量的40.4─63.0%,顯示此一階段具極高的碳素與氮素同化作用。植株於吐絲期之單株乾物質與氮素含量,前者佔成熟期總乾物重之27.8─48.1%,後者佔成熟期總氮素含量之47.8─75.5%,變域極大,以未施變化密度的處理較高,吐絲期始將株距自11 cm增大至22 cm處理較低。雖然三項自吐絲後即維持22...
Palavras-chave: 玉米 栽培密度 營養生長 產量 Zea mays; Plant spacing; Vegetative growth; Yield [[classification]]6.
Ano: 1994
Registros recuperados: 12
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