| This article has been：Browse 1936Times Download 2640Times |
|
|
|
| DOI： |
|
| Fertilization Affects the Emission of CO2 and N2O in Hetao Irrigation Area |
|
BAI Xueyuan, HONG Mei, YANG Yanming, GAO Fanshen, HUO Lixia, ZHANG Jianqiang
|
|
Inner Mongolia Agricultural University, Hohhot 010019, China; Inner Mongolia Soil and Fertilizer Station, Hohhot 010011, China; HangJinHouBanner, Agricultural Centers, Bayan Nur 015400, China
|
| Abstract: |
| Impact of fertilization on greenhouse emission in Hetao Irrigation District was investigated in this paper. Four treatments were examined: slowly controlled releasing fertilizers (HK), organic fertilizer (F), microbial fertilizer (W) and business as usual (CK) from May to October in 2015. The emission of CO2 and N2O from a maize field was measured using static chamber gas chromatography to investigate the potential greenhouse gas emissions and temperature change at soil surface. The result revealed that ①N2O emission peaked in all treatments 10 days after applying N fertilizer. HK had the lowest while F had the highest emission rate during the whole growing season. N2O emission from F treatment was 62.40% higher than that from CK, whereas the N2O emission from CK was 19.71% and 54.26% higher than that from W and HK treatments respectively.②There were a significant difference in CO2 emission between the treatments, with W having the lowest emission and F the highest. CO2 emission from the CK was 16.75% higher than that from W. ③The increase in soil-surface temperature under different treatments was in the order of HK＜W＜CK＜F. We also found that the yields under HK and F treatments were comparable to that in the CK, but the greenhouse gas intensity (GHGI) in the HK and F was 96% and 170% of that in the CK respectively. GHGI in W treatment was high, but its yield was low compared with those in the CK. Applying organic fertilizers increased the emission of greenhouse gases. Our results showed that HK gave a high yield and low GHGI, and is efficient in promoting food production without increasing greenhouse gas emission. |
| Key words: fertilization; CO2; N2O; emission intensity |
|
|
