1. Introduction
Maize (Zea mays L.) is a major cereal produced in the world and the most cultivated in Brazil, practically the
E. E. Dantas Junior et al.
499
entire territory, however, there is a enormous contrast in productivity among different regions of the country,
due to the different climates and cultivation conditions to which culture is submitted. The cultivation of this cereal is well adapted to tropical and subtropical regions, however, [1] emphasized that the yield of corn in the
northeastern region is low, because of the predominance of production systems that use little or no technology
and there are usually, in this region, failure and irregular rainfall. Corroborating this idea [2] pointed out that the
failure or irregular distribution of rainfall is a major factor limiting agricultural production in Brazil, yet occurred in recent years, a significant increase in the cultivation of maize under irrigation.
The dissemination of techniques for systematic production processes, with intensification of plantations profitable cultivars is of fundamental importance, by virtue to optimize the use, in particular water and soil. Scientists from all over the world look to the studies correlated to water use efficiency (WUE) which is an important
measure that shows the relationship between the unit dry matter produced and unit of water used. According to
[3] water use efficiency (WUE) is one of the ways to analyze the response of crops to different conditions of
water availability as it relates to the production of dry biomass or commercial production with the amount of
water applied evapotranspired or by culture. For El-Hendawy [4] the water use efficiency through modern irrigation systems is increasingly important in arid and semi-arid regions with limited water resources.
The methods of using water efficiently, seeking increased crop yield with quantitative under water, and what
happens in well planned irrigation projects, are encouraged by many researchers in the world [5], considering
that nowadays water is a limiting factor of various human activities.
It signaled that the use of irrigation techniques coupled with management of soil fertilization, provides higher
economic returns in corn, although crops under irrigation should be planned for the greater financial return of
production and less impact on the environment, since there is great environmental damage for excessive use of
fertilizers [2] and excess water in irrigation.
Faced with the shortage of studies focused on the Brazilian semiarid region regarding irrigation management
in areas with limited water resources, this research aimed to evaluate the water use efficiency (WUE) in the
production of green corn spikes under conditions of Cariri Paraiba (subclima semiarid).
2. Materials and Methods
1. Introduction
Maize (Zea mays L.) is a major cereal produced in the world and the most cultivated in Brazil, practically the
E. E. Dantas Junior et al.
499
entire territory, however, there is a enormous contrast in productivity among different regions of the country,
due to the different climates and cultivation conditions to which culture is submitted. The cultivation of this cereal is well adapted to tropical and subtropical regions, however, [1] emphasized that the yield of corn in the
northeastern region is low, because of the predominance of production systems that use little or no technology
and there are usually, in this region, failure and irregular rainfall. Corroborating this idea [2] pointed out that the
failure or irregular distribution of rainfall is a major factor limiting agricultural production in Brazil, yet occurred in recent years, a significant increase in the cultivation of maize under irrigation.
The dissemination of techniques for systematic production processes, with intensification of plantations profitable cultivars is of fundamental importance, by virtue to optimize the use, in particular water and soil. Scientists from all over the world look to the studies correlated to water use efficiency (WUE) which is an important
measure that shows the relationship between the unit dry matter produced and unit of water used. According to
[3] water use efficiency (WUE) is one of the ways to analyze the response of crops to different conditions of
water availability as it relates to the production of dry biomass or commercial production with the amount of
water applied evapotranspired or by culture. For El-Hendawy [4] the water use efficiency through modern irrigation systems is increasingly important in arid and semi-arid regions with limited water resources.
The methods of using water efficiently, seeking increased crop yield with quantitative under water, and what
happens in well planned irrigation projects, are encouraged by many researchers in the world [5], considering
that nowadays water is a limiting factor of various human activities.
It signaled that the use of irrigation techniques coupled with management of soil fertilization, provides higher
economic returns in corn, although crops under irrigation should be planned for the greater financial return of
production and less impact on the environment, since there is great environmental damage for excessive use of
fertilizers [2] and excess water in irrigation.
Faced with the shortage of studies focused on the Brazilian semiarid region regarding irrigation management
in areas with limited water resources, this research aimed to evaluate the water use efficiency (WUE) in the
production of green corn spikes under conditions of Cariri Paraiba (subclima semiarid).
2. Materials and Methods
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