Soil tillage and emission of CO2, soil temperature and soil moisture in a sugarcane area

被引：15
|
作者：
Iamaguti, Juliano L. [1 ]
Moitinho, Mara R. [1 ]
Teixeira, Daniel D. B. [2 ]
Bicalho, Elton da S. [1 ]
Panosso, Alan R. [3 ]
La Scala Junior, Newton [1 ]
机构：
[1] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Ciencias Exatas, Jaboticabal, SP, Brazil
[2] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Solos & Adubos, Jaboticabal, SP, Brazil
[3] Univ Estadual Paulista, Dept Matemat, Ilha Solteira, SP, Brazil
来源：
REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL | 2015年 / 19卷 / 05期
关键词：
soil respiration; subsoiling; sugarcane; greenhouse gases; RAIN-FOREST; IMPACTS; EFFLUX;
D O I：
10.1590/1807-1929/agriambi.v19n5p497-504
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Soil tillage is one of the agricultural practices that may contribute to increase the loss of carbon through emission of CO2 (FCO2). The aim of this study was to investigate the effect of three soil tillage systems on FCO2, soil temperature and soil moisture in a sugarcane area under reform. The experimental area consisted of three tillage plots: conventional tillage (CT), conventional subsoiling (CS), and localized subsoiling (LS). FCO2, soil temperature and soil moisture were measured over a period of 17 days. FCO2 showed the highest value in CT (0.75 g CO2 m(-2) h(-1)). Soil temperature presented no significant difference (p > 0.05) between LS (26.2 degrees C) and CS (25.9 degrees C). Soil moisture was higher in LS (24%), followed by CS (21.8%) and CT (18.3%). A significant correlation (r = -0.71; p < 0.05) between FCO2 and soil temperature was observed only in CT. The conventional tillage presented a total emission (2,864.3 kg CO2 ha(-1)) higher than the emissions observed in CS (1,970.9 kg CO2 ha(-1)) and LS (1,707.7 kg CO2 ha(-1)). The conversion from CT to LS decreased soil CO2 emissions, reducing the contribution of agriculture in increasing the concentration of greenhouse gases in the atmosphere.
引用
收藏
页码：497 / 504
页数：8
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