Publications by authors named "Naoki Fukuju"
Objective: In our previous study, we observed that the addition of waste cooking oil (WCO) reduced ammonia (NH3) emissions during laboratory-scale composting of dairy cattle manure under low-aeration condition. Therefore, this study aimed to evaluate the effect of addition of WCO on NH3 emissions reduction during pilot-scale composting of dairy cattle manure, which is close to the conditions of practical composting treatment.
Methods: Composting tests were conducted using pilot-scale composting facilities (1.
Article Synopsis
- The study investigated how adding waste cooking oil (WCO) affects ammonia emissions during composting of dairy cattle manure under different aeration conditions.
- The composting tests were done with three treatments of manure, measuring NH3 emissions and nitrogen loss while varying aeration rates in two tests.
- Results showed that while higher WCO content increased NH3 emissions at a higher aeration rate, it actually decreased emissions at a lower aeration rate, suggesting that aeration is a key factor in managing emissions with WCO addition.
The present study was conducted to determine the difference in plasma prostaglandin F α metabolite concentrations following oxytocin (OT) challenge between pregnant and non-pregnant cows. Experiment 1: cows were subjected to the OT challenge test on days 12, 14 or 16 (day of estrus = day 0) with or without prior insemination and plasma 13,14-dihydro-15-keto prostaglandin F α (PGFM) concentrations were measured from -30 to 180 min after OT injection. On day 16, the increment of plasma PGFM concentrations in response to OT injection was significantly smaller in pregnant than that in cyclic cows.
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