Citas bibligráficas
Suquisupa, C., (2019). Emisión de óxido nitroso en sistemas de producción lechera en praderas naturales altoandinas durante la época seca [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/4112
Suquisupa, C., Emisión de óxido nitroso en sistemas de producción lechera en praderas naturales altoandinas durante la época seca [Tesis]. : Universidad Nacional Agraria La Molina; 2019. https://hdl.handle.net/20.500.12996/4112
@mastersthesis{renati/1114536,
title = "Emisión de óxido nitroso en sistemas de producción lechera en praderas naturales altoandinas durante la época seca",
author = "Suquisupa Herrera, Carlos Tomas",
publisher = "Universidad Nacional Agraria La Molina",
year = "2019"
}
The objective of this study was to evaluate nitrous oxide (N2O) emissions in soils of grasslands under grazing of dairy cattle during the dry season in the Agricultural Cooperative of San Francisco of Chichausiri, Junin Department, Peru. Two treatments were evaluated, with and without the application of urine, to measure the N2O emission flows in 16 closed flow static chambers during 34 days of experimentation between August to September 2017. In addition, physical and chemical environmental factors with more influence on N2O emissions were evaluated, such as temperature, water-filled porous space (WFPS), ammonium (NH4) and nitrate (NO3). Gas samples were collected from the closed flow chambers using emptied glass vials, which were then sent to the Nutritional Biochemistry Laboratory of the Animal Science College at Universidad Nacional Agraria La Molina, for their respective reading by chromatography of gases. The study showed that treatments had highly significant differences (P <0.001) in accumulated flow emissions per chamber being 251.071 mg N-N2O/m2 and 116.181 mg N-N2O/m2 for the treatment with urine and without urine, respectively. Likewise, the N2O emissions have a positive direct correlation (P<0.001) with the concentrations of NO3 (r=0.58), NH4 (r=0.63) and the EPLLA (P <0.005) (r = -0.22). The N2O emission flow of the urine treatment showed 2.6 times higher values on the treatment without urine. The estimated emissions of N2O in the dry season were 5.8864 kg N-N2O / ha, which are considered high regarding other areas with little precipitation.
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