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Provedor de dados:  Taiwan Agricultural Research Institute
País:  Taiwan
Título:  EFFECTS OF SPLIT APPLICATION OF FERTILIZER AND PLANTING DENSITY ON YIELD, COMPONENTS OF YIELD AND OTHER AGRONOMIC CHARACTERS OF RICE
水稻肥料分施與栽植密度對產量,產量構成因子及其他主要農藝性狀之效果
Autores:  W.L. Chang
S.C. Yang
張萬來
楊遜謙
Data:  1964-03
Ano:  1964
Palavras-chave:  [[classification]]14
Resumo:  [[abstract]]A panicle-type Japonica variety of rice Chianung 242 was subjected to two methods of fertilizer application namely, conventional and split methods, and two levels of planting density, 64 hills and 96 hills per Pen (3.3 m2). The experiment was arranged in split plot design with methods of fertilization as main treatments and planting densities as sub-treatments. The experiment was replicated 4 times on the Experimental field of Chaiyi Agricultural Experiment Station in the second crop of 1963. Data on grain yield, components of yield and other agronomic characters were taken to determine the effect of both treatments as well as their interactions. Split application of fertilizer was found to produce higher yield than conven-tional method of fertilization. The yield increase was found to be due largely to the increase of grain weight. The increase of grain yield by high planting density was also significant and it was attributable to the increase of panicles per unit area. The weight and length of panicles were significantly increased by split applica-tion of fertilizers, but they were generally decreased as the plant population increased. Heading date and plant height were not significantly affected by both treatments. The first internode was significantly longer in the plant of split fertilization but the rest of the internodes were shorter than those of conventional one. A similar trend of smaller magnitude was also observed in planting density. The long first internode of rice plant was found to be related to high grain yield. Lodging was significantly reduced by split fertilization but no significant difference occurred in planting densities. The relationship between the length of internodes and the percentage of lodging was still not clearly understood. A tendency for the plot of high planting density to produce higher yield under split application of fertilizer was revealed, although no significant interaction between the treatments was evident. A similar observation was also made in the percentage of lodging, indicating a possible reduction of lodging in the plots of high planting density by the use of split fertilization. 本試驗分肥料施用法與栽植密度兩處理。肥料施用法為:肥料分施(基肥:N ,P全量,K ,全層施肥,第一次追肥:N 於第二次除草時施用,第二次追肥或穗肥,N ,K 插秧後42日施用)與慣行施肥法(基肥N ,PK全量,全層施肥,第一次追肥,N 於第二次除草時施用)兩種。栽植密度亦分兩級,即:密植或每坪96株與疏植或慣行栽植密度,每坪64株。本試驗於民國52年第2期作在嘉義農業試驗分所舉行,以明暸各處理對水稻產量及主要農藝性狀之效果。玆將所得結果摘要如下: 肥料分施可增加每公頃乾淨谷產量百分之六•七五,經產量構成因子分析結果指出其增產原因為谷千粒重之增加所致。增加栽植密度,增產百分之五•七九,差異顯著其產量之提高,乃得自單位面積內總穗數之增加。 每株分蘗及穗數不因肥料施用法而大幅增減,惟可隨栽植密度之增加而顯著減少。每穗粒數雖可因肥料分施而稍增,隨密植而稍減,但差異均不顯著,穗長與穗重因肥料之分施而顯著增加,惟因栽植密度之提高而減低,株高及生育日數,處理間差異均不顯著。 肥料分施增加稻莖第一節間長度,餘外節間頗顯縮短,而形成所謂多產型稻株。此結果經發現與產量之增加及倒伏之減少有關。惟倒伏性與稻莖節間長度之關係尚欠明暸。 肥料施用法與栽植密度之間,雖未見顯著之交感作用存在,但肥料分施與密植之配合,每有增產之趨勢,而倒伏性亦有遞減現象。
Idioma:  Inglês
Identificador:  [[uri]]http://210.69.150.18:8080//handle/345210000/1713
Relação:  Agricultural Research 13(1): 16-27
農業研究 13(1): 16-27
Formato:  [[extent]]1464410 bytes

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