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Provedor de dados:  Taiwan Agricultural Research Institute
País:  Taiwan
Título:  水稻尿素肥料分施試驗
EXPEPIMINT ON THE TIMING OF UREA APPLICATION IN RICE
Autores:  楊遜謙
S.C. Yang
Data:  1965-06
Ano:  1965
Palavras-chave:  [[classification]]14
Resumo:  [[abstract]]1.尿素肥料分施較硫酸錏肥料可提高產量。 2.水稻尿素分施次數,第一期作以3次,二期作2~3次。 3.尿素用作基肥與追肥不影響肥效,但分施量以後期較少為安全。 4.尿素施肥次數與時期頗有關係,在第一期作以處理6,第二期作以處理5為佳。 An investigation was carried out in both crops of 1964 at Chiayi Agricultural Experiment Station to evaluate the effect of the timing of urea application on rice. The rice variety Chianung 242 was subjected to the following treatments: A. Ammonium sulfate. 1/2 applied as a basal dressing, and the balance as a top-dressing at 30 days (1st. crop) and 20 days (2nd crop) after transplanting. (check). B. Urea. 1/2 applied as a basal dressing, and the balance as a top dressing at 50 days (1st. crop) and 40 days (2nd. crop) after transplanting. C. Urea. 1/2 applied as a basal dressing, and the balance as a top dressing at 60 days (1st. crop) and 45 days (2nd. crop) after transplanting. D. Urea. 1/5 applied as a basal dressing, 2/5 as first top-dressing at 30 days (1st. crop) and 20 days (2nd. crop), and 2/5 as second top-dressing at 50 days (1st. crop) and 45 days (2nd. crop) after transplanting. E. Urea. 1/2 applied as first top-dressing at 7 days after transplanting, and the balance as second top-dressing at 30 days (1st. crop) and 25 days (2nd. crop) after transplanting. F. Urea. 1/2 applied as first top-dressing at 7 days after transplanting, 1/4 as second top-dressing applied at 30 days (1st. crop) and 20 days (2nd. crop), and the remaining 1/4 as third top-dressing at 60 days (1st. crop) and 45 days (2nd. crop) after transpiating. The total amount of fertilizers used in this experiment was 80, 40, 40, and 100, 50, 50, kg per hectare for N, P, K, at first and second crops, respectively. The plot was 4×2.5 m in size which was equal to 10 m2 or 1/1,000 hectare. Approximately 5 seedlings were transplanted in each hill. The distance between rows was 25 cm while that of hills was 20 cm. The experiment was arranged in randomized blocks with 8 replications. Some important findings are summerized below: 1. When split-applicated, urea could produce bettey yield than ammonium sulfate, the main source of nitrogen fertilizer in Taiwan. 2. Urea fertilizer splitted 3 times in the first crop and 2 to 3 times in the second crop gave the most astisfactory results. 3. Urea fertilizer used either as a basal dressing or top-dressing appeared to be equally effective. However, heavier dosage at the later top-dressing seemed more profitable. 4. There was a close association between the times and the time of urea application. Treatment F in the first crop and treatment E in the second crop produced the highest yield due presumably to applying urea at the critical stages of rice growth namely, the panicle primordia differentiation in the former, and the maximum tillering in the latter.
Idioma:  zh_tw
Identificador:  [[uri]]http://210.69.150.18:8080//handle/345210000/1711
Relação:  農業研究 14(2): 49-53
Agricultural Research 14(2): 49-53
Formato:  [[extent]]800098 bytes

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