| The ammonia volatilization of anthropogenic-alluvial soil in summer maize farmland under different fertilization methods in Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2017.05.12 |
| Key Words: ammonia volatilization anthropogenic-alluvial soil fertilization method summer maize mitrogen balance |
| Author Name | Affiliation | | YANG Xiao-yun | Academy of Resources and Environment of Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YANG Hu-de | Academy of Resources and Environment of Gansu Agricultural University, Lanzhou, Gansu 730070, China
Institute of Soil and Fertilizer and Water-saving Agriculture, Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The effects of different fertilization methods on the ammonia volatilization of anthropogenic-alluvial soil and maize growth and nitrogen balance were studied by intermittent closed chamber pumping method. The results showed that the ammonia volatilization of basal fertilizer and topdressing fertilizer continued for 15 days and 11 days. The accumulation of ammonia volatiles during basal fertilizer period was between 2.970 and 4.123 kg·hm-2, accounting for 0.81% to 1.65% of the total amount of fertilizer, and the accumulation of ammonia volatiles during topdressing fertilizer period was between 6.240～8.347 kg·hm-2, accounting for 3.1% to 4.6% of the amount of fertilizer applied; The loss of ammonia volatilization was lower under the condition of film and urea fertilization, and the utilization rate of nitrogen fertilizer was higher than that of conventional fertilization. The mass of 1000 grains was higher than that of conventional fertilization 3.6% to 11.9%, and yield of maize was higher than that conventional fertilization 24.98% to 36.73%; reduce the nitrogen surplus of 40.46 to 68.67 kg·hm-2. In summary, the application of film mulching (urea deep application / surface irrigation) can reduce soil ammonia volatilization loss, promote the growth and development of summer maize and yield, increase production efficiency, decrease agricultural non-point source pollution. Therefore, film mulching will be large-scale used in anthropogenic-alluvial soil of the summer maize planting area in Gansu Province. |
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