Energy balance of irrigated maize silage

被引：6

作者：

Ferreira, Tomas de Aquino ^{[1
]}

Ferreira, Silvia Costa ^{[1
]}

Barbosa, Jackson Antonio ^{[1
]}

Silva Volpato, Carlos Eduardo ^{[1
]}

Ferreira, Rute Costa ^{[2
]}

da Silva, Marielle Jordane ^{[1
]}

Barbosa, Leonardo Maia ^{[1
]}

机构：

[1] Univ Fed Lavras UFLA, Dept Engn, Campus Univ,Caixa Postal 3037, BR-37200000 Lavras, MG, Brazil

[2] CPTEC, INPE, Cachoeira Paulista, SP, Brazil

来源：

CIENCIA RURAL | 2018年 / 48卷 / 05期

关键词：

energy efficiency; energy in agriculture; center pivot; sustainability; PRODUCTION SYSTEMS; ECONOMIC-ANALYSIS; CORN PRODUCTION; BRAZIL; NITROGEN; CROP; DRIP; IRAN;

D O I：

10.1590/0103-8478cr20170625

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The aim of the present study is to evaluate the energy balance and energy efficiency of the silage maize crop in the Center for Research, Development and Technology Transfer of the Universidade Federal de Lavras (CDTT-UFLA). The crop uas irrigated by center pivot and the stages of maize cultivation and energy inputs were monitored for the 1st and 2nd crops of the 2014/2015 harvest. Results from the energy analysis showed the crop had a total energy input of 45,643.85 MJ ha(-1) and 47,303.60 MJ ha(-1) for the 1st and 2nd crops and a significant predominance of direct energy type (about 92% of the matrix). Regarding direct energy inputs, the diesel oil was the most representative, contributing with approximately 38% of the total energy demand. Conversely, the irrigation system contribute with 3.92% e 5.97% in the 1st and 2nd crops, representing the largest indirect energy input. Nevertheless, irrigation and crop management allowed the system achieving high levels of productivity, resulting in an energy efficiency of 25.1 and 28.1 for the first and second crops respectively.

引用

页数：7

共 25 条

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