Grain quality of upland rice cultivars in response to cropping systems in the Brazilian tropical savanna

被引：22

作者：

Costa Crusciol, Carlos Alexandre ^{[1
]}

Arf, Orivaldo ^{[2
]}

Soratto, Rogerio Peres ^{[1
]}

Mateus, Gustavo Pavan ^{[3
]}

机构：

[1] UNESP FCA, Depto Prod Vegetal, BR-18603970 Botucatu, SP, Brazil

[2] UNESP FE, Depto Fitotecnia Tecnol Alimentos & Socioecon, BR-15385000 Ilha Solteira, SP, Brazil

[3] APTA Polo Reg Desenvolvimento Tecnol Agronegocios, BR-16900000 Andradina, SP, Brazil

来源：

SCIENTIA AGRICOLA | 2008年 / 65卷 / 05期

关键词：

Oryza sativa; sprinkler irrigation; milling yield; head rice yield;

D O I：

10.1590/S0103-90162008000500004

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The industrial quality of grain is an important parameter to determine the commercial value of rice and can be influenced by water availability and type of cultivar. The present study aimed to evaluate the milling yield as well as the protein and nutrient contents of polished grains originated from two upland rice cultivars grown under rainfed and sprinkler-irrigated conditions. A randomized block design was used in a split-plot arrangement with eight replicates. Plots consisted of two cropping systems ( rainfed and sprinkler-irrigated) with subplots consisting of two cultivars recommended for upland ecosystems (IAC 201 and Carajas). The sprinkler irrigation system increased upland rice milling (8.0%) and head rice yield (23.7%), for years with hot and dry weather spells occurring during the reproductive and maturation stages. Under conditions of lower water availability, the Carajas cultivar showed a milled yield value 5.1% higher than that of cultivar IAC 201. Lower water availability provided increases in protein, N, P, Ca, Mg, Fe, and Zn contents but reductions in S and Cu in the polished grains. Cultivars IAC 201 and Carajas had similar nutrient contents in the polished grains.

引用

页码：468 / 473

页数：6

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