Nitrous Oxide and Carbon Dioxide Concentration in Farrowing Pens with Permanent Limited Range of Motion for Lactating Sows

Abstract

Nitrous oxide (N2O) and carbon dioxide (CO2) are two of the most important gases causing global warming. Production of mentioned gases is pig housing considerable. The aim of the paper was a comparison of the N2O and CO2 concentration in the different places in pig barn. Measurements were done in the Experimental Centre for Livestock of Department of Animal Husbandry in FAaFR, SUA in Nitra, Slovakia, where sows of Large White breed with their piglets were housed. There were individual farrowing pens with permanent limited range of motion for lactating sows. Samples of air were collected in each pen both in sow zone and piglets zone. The photo acoustic field gas system consisted of INNOVA devices (photo acoustic field gas-monitor INNOVA 1412 and multipoint sampler INNOVA 1309). There were used for measurement of the gases concentration. Data were analysed by using Kruskal-Wallis Test after normality test by using Kolmogorov-Smirnov test and homogeneity of variance by using Levene’s test. Used software was SAS® 9.2. Average values of N2O and CO2 concentration ranged from 0.51898 to 0.52106 ppm and from 515.293 to 519.580 ppm, respectively. Data have shown no statistically significant differences between N2O and CO2 concentration in the zones of lactating sows and piglets at the 95.0% confidence level. Air circulation between the zones of lactating sows and piglets in the pig barn was on the sufficient level.

N2O i CO2 su dva najvažnija gasa koji izazivaju globalno zagrevanje. Produkcija pomenutih gasova u objektima za svinje je značajna. Cilj ovog rada bilo je poređenje koncentracija N2O i CO2 na različitim mestima u objektu za svinje. Merenja su izvršena u eksperimentalnom Centru za stočarstvo Departmana za stočarstvo na FAaFR, SUA kod Nitre u Slovačkoj, gde se drže krmače rase Large white sa prasadima. Objekti za prašenje su opremljeni pojedinačnim boksovima za prašenje sa stalno ograničenim prostorom za kretanje krmača u laktaciji. Uzorci vazduha su uzimani u svakom boksu i u obe zone: zoni krmača i zoni prasadi. Foto akustični system se sastoji od uređaja INNOVA (foto akustični monitor gasova INNOVA 1412 i višekanalni sempler INNOVA 1309). U ovom slučaju uređaj je upotrebljen za merenje koncentracije gasova. Podaci su analizirani upotrebom Kruskal-Wallis testa, posle testa normaliteta upotrebom Kolmogorov-Smirnov testa i homogenosti varijanse upotrebom Levene testa. Korišćen je programski paket SAS® 9.2. Srednje vrednosti koncentracija N2O i CO2 nalazile su se u intervalima od 0.51898 do 0.52106 ppm i od 515.293 do 519.580 ppm, redom. Rezultati su pokazali da nema statistički značajnih razlika među koncentracijama N2O i CO2 u zonama krmača i zonama prasadi, pri nivou poverenja od 95.0%. Strujanje vazduha između zona krmača i prasadi u objektu bilo je zadovoljavajuće.