Soil management and nitrogen fertilization for sprinkler-irrigated upland rice cultivars

Scientia Agricola

Orivaldo Arf²  Ricardo Antonio Ferreira Rodrigues¹  Carlos Alexandre Costa Crusciol¹  Marco Eustáquio De Sá²  Salatiér Buzetti¹ 

[1] ,UNESP Faculdade de Engenharia de Ilha Solteira Depto. Fitotecnia, Tecnologia de Alimentos e Sócio-EconomiaIlha Solteira SP ,Brasil

关键词: Oryza sativa L;    yield components;    moldboard plow;    harrow;    no-till;    Oryza sativa L.;    componentes do rendimento;    arado de aiveca;    grade;    plantio direto;   

DOI  :  10.1590/S0103-90162003000200020

来源: SciELO

【 摘 要 】

The use of sprinkler irrigation for rice (Oryza sativa L.) crop is a relatively recent practice in Brazil. Therefore, crop soil and fertilization management are still not very well defined. Another problem is the inexistence of specific cultivars adapted to this cropping system. This study aimed to evaluate sprinkler-irrigated upland rice cultivars under different soil management practices and nitrogen sidedressing rates in relation to yield and grain quality. A randomized block design was used, arranged as a 3 x 3 x 5 factorial scheme, totaling 45 treatments consisting of the combination of three rice cultivars (Primavera, Confiança and Maravilha), three soil management systems (disk harrow + levelling harrow, moldboard plow + levelling harrow and no-till) and five nitrogen rates, applied as sidedressing (0, 25, 50, 75 and 100 kg ha-1), with four replicates. The experiment was set up during the 1999/2000 and 2000/2001 cropping seasons, in Selvíria, MS, Brazil, on a Typic Haplustox of clayey texture. Cultivars Primavera and Maravilha presented higher grain yield than Confiança; on the other hand the latter showed higher milled and head rice yields during seed processing. Soil tillage with the moldboard plow and no-till interfered positively in the agronomic and productive characteristics of the crop. In relation to milled rice yield, tilling with the levelling disk + moldboard plow showed better results in relation to no-till. Nitrogen sidedressing did not interfere with the agronomic and productive characteristcs as well as with the milled rice yield of all cultivars.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License