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| Combined effects of coating/inhibitors on N2O emission and ammonia volatilization in farmland soil |
| Received:November 07, 2017 |
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| KeyWord:coated urea;biological inhibitor;N2O emission;ammonia volatilization;cost and benefit analysis |
| Author Name | Affiliation | E-mail | | BA Chuang | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | | | YANG Ming | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | | | ZOU Hong-tao | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | zouhongtao2001@163.com | | JIANG Yi-fei | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | | | WANG Dan-lei | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | | | CHEN Song-ling | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | | | YU Na | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | | | ZHANG Yu-ling | College of Land and Environment, Shenyang Agricultural University
Key Laboratory of Arable Land Conservation(Northeast China), Ministry of Agriculture
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China | |
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| Abstract: |
| We examined the effects of coated fertilizer plus inhibitors on N2O emission and ammonia volatilization from soil using both closed static chamber-gas chromatography and aeration methods in pot experiments. Our results showed that the application of encapsulated urea in combination with inhibitors could delay the peak occurrence of N2O emission and ammonia volatilization compared with urea treatment(U) alone. Cumulative N2O emissions from the treatments using film-coated urea(T1), film plus inhibitor-coated urea(T2), inhibitor-coated urea encapsulated by film(T3), and film-coated urea blended with inhibitors(T4) were significantly lower than that of U by 27%, 39%, 49%, and 39%, respectively. The N2O emission from T3 was the lowest(0.87 kg N·hm-2). There was no significant difference in N2O emission between T2 and T4 treatments. Similarly, coated fertilizer plus inhibitors reduced soil ammonia volatilization. Ammonia volatilization under the T3 treatment was the lowest, at 13.68 kg N·hm-2. The amount of ammonia volatilization under treatments T2, T3, and T4 were significantly lower than that under U by 34%, 45%, and 31%, respectively. Maize yields under treatments T2 and T3 were 13.03% and 17.98% higher than that under U treatment, respectively. Nitrogen utilization efficiency under treatment T3 was up to 58.22%. Ultimately, the cost and benefit analysis results showed that, compared with that of the other treatments, the net benefit of T3 was the largest(3 061.6 yuan·hm-2). Thus, coated urea plus inhibitors could reduce ammonia volatilization and N2O emission, and subsequently increase nitrogen utilization efficiency and maize yield. Moreover, T3 was more effective than other fertilizers. |
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