Cattle excreta deposited on grazed

Cattle excreta deposited on grazed pastures is estimated to represent 16% of global anthropogenic nitrous oxide (N2O) emissions, a powerful greenhouse gas (GHG)5. About 75–95% of cattle ingested N is excreted in either urine or dung, which provides N-rich substrate for nitrification and denitrification6,7. Cattle urine patches can contain very high amounts of soluble N (equivalent to 500–1000 kg N ha−1), more than 2–3 times of the N uptake capacity of pastures8. Annually, about 1.5 Tg of total global anthropogenic N2O emissions (6.7 Tg N2O-N yr−1) are emitted from excreta produced by grazing cattle9,10 through both direct and indirect (from leached and volatilized excreta nitrogen) emissions. About 2% (0.7–6% uncertainty)11 of the nitrogen (N) in deposited urine is lost as N2O. Lower emission factors (EFs) (

結果 (繁體中文) 1:

沉積在放牧牛牧場排泄物估計佔全球人為氧化亞氮（N2O）的排放量的16％，強有力的溫室氣體（GHG）5。牛的約75-95％攝取N被任一尿或糞便，這提供了硝化和denitrification6,7富N型襯底中排出。牛尿貼劑可以包含非常高含量的可溶性N（相當於500-1000千克氮公頃-1），攝取pastures8的容量的N超過2-3倍。每年約有總全球人為N2O排放的1.5的Tg（6.7 Tg的N2O-N YR-1）從​​通過直接和間接（從瀝濾和揮發排泄物氮）的排放放牧cattle9,10產生排泄物被發射。約2％（0.7-6％的不確定性）中沉積的尿氮（N）的11丟失N2O。低級排放因子（EFS）（

結果 (繁體中文) 2:

燃燒

結果 (繁體中文) 3:

據估計，放牧牧場上的牛糞占全球人為一氧化二氮（N2O）排放量的16%，這是一種强大的溫室氣體（GHG）5。大約75-95%的牛攝入的氮通過尿液或糞便排出，這為硝化和反硝化提供了富含氮的底物6,7。牛尿斑含有非常高的可溶性氮（相當於500–1000 kg N ha−1），是牧場8氮吸收能力的2–3倍以上。每年，大約1.5 Tg的全球人為N2O排放總量（6.7 Tg N2O-N yr-1）是從放牧牛產生的排泄物中排放的9,10，通過直接和間接（從瀝濾和揮發的排泄物氮）排放。約2%（0.7–6%不確定度）11的氮（N）在沉積尿中以N2O的形式流失。低排放因數（EFs）（