Ammonia volatilization loss of nitrogen fertilizer from rice field and wet deposition of atmospheric nitrogen in rice growing season

Abstract

Abstract: Plot and field experiments showed that the NH₃ volatilization loss from rice field reached its maximum in1～3 days after N-fertilization, which was affected by the local climate conditions (e.g., sun illumination, temperature, humidity, wind speed, and rainfall), fertilization time, and ammonium concentration in surface water of the rice field. The wet deposition of atmospheric nitrogen was correlated with the application rate of Nfertilizer and the rainfall. The amount of nitrogen brought into soil or surface water by the wet deposition in rice growing season reached 7.5 kg·hm^-2. The percent of NH₄⁺-N in the wet deposition was about 39.8%～73.2%, with an average of 55.5%. There was a significant correlation of total ammonia volatilization loss with the average concentration of NH₄⁺-N in wet deposition and total amount of wet deposition in rice growing season.

Key words: Rice field, Ammonia volatilization, Wet deposition

CLC Number:

SU Chengguo, YIN Bin, ZHU Zhaoliang, SHEN Qirong. Ammonia volatilization loss of nitrogen fertilizer from rice field and wet deposition of atmospheric nitrogen in rice growing season[J]. Chinese Journal of Applied Ecology, 2003, (11): 1884-1888.

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