Position: Home > Articles > Effects of Polyaspartic Acid Calcium Salt on the Dynamic Changes of NH_4~+,NO_3~- and Total Nitrogen in Surface Water of Paddy Field
Journal of Soil and Water Conservation
2018
(6)
208-213+221
聚天门冬氨酸钙盐对水稻田面水中三氮动态变化的影响
作 者：
董世杰;鲁屹;唐婉莹;刘琪;程梦笛;张庆国;杨书运;马友华
单 位：
安徽农业大学资源与环境学院;安徽农业大学理学院
关键词：
聚天门冬氨酸钙盐;水稻田面水;三氮;动态变化
摘 要：
利用桶栽试验探究不同浓度水平的聚天门冬氨酸钙盐(PASP-Ca)对水稻田面水中铵态氮(NH_4~+)、硝态氮(NO_3~-)和总氮(TN)浓度动态变化的影响。结果表明,施氮后,田面水中TN、NH_4~+和NO_3~-分别于第1,3,9天达到最大值,随后逐渐降低。NO_3~-/TN多在0.1以下,(NH_4~++NO_3~-)/TN多在0.5以上。因此,可以将NH_4~+和TN作为农田水污染防治的主要监测指标,NO_3~-作为辅助指标。添加一定浓度的PASP—Ca能对田面水中氮素浓度的变化起到缓释作用,其中0.3%浓度水平的PASP—Ca效果相对较好,田面水中NH_4~+和TN的下降速率分别为3.452,4.806mg/(L·d),与单施氮肥(CK)相比,分别降低了11.68%和16.25%;同时,NH_4~+的平均浓度为6.999mg/L,较CK低了3.88%;NO_3~-的平均浓度为0.396mg/L,较CK低了24.83%;TN的平均浓度为20.077mg/L,较CK提升了3.10%。施氮后田面水中TN浓度随时间呈对数递减,而NH_4~+浓度在施氮后3天内随时间呈对数增加,之后随时间呈对数递减趋势。施氮后的9天内是防止稻田田面水中氮素流失的关键时期。
译 名：
Effects of Polyaspartic Acid Calcium Salt on the Dynamic Changes of NH_4~+,NO_3~- and Total Nitrogen in Surface Water of Paddy Field
作 者：
DONG Shijie;LU Yi;TANG Wanying;LIU Qi;CHENG Mengdi;ZHANG Qingguo;YANG Shuyun;MA Youhua;School of Resources and Environment,Anhui Agricultural University;School of Science,Anhui Agricultural University;
单 位：
DONG Shijie%LU Yi%TANG Wanying%LIU Qi%CHENG Mengdi%ZHANG Qingguo%YANG Shuyun%MA Youhua%School of Resources and Environment,Anhui Agricultural University%School of Science,Anhui Agricultural University
关键词：
PASP-Ca;;surface water of paddy field;;NH4+,NO3- and total nitrogen;;dynamic change
摘 要：
A barrels planted experiment was conducted to study the effects of PASP-Ca with different concentration levels on the dynamic changes of NH_4~+,NO_3~-and total nitrogen(TN)concentrations in surface water of paddy field.The result showed that the concentrations of TN,NH_4~+and NO_3~-in the surface water of paddy field reached the maximum within 1day,3days and 9days respectively after nitrogen application.NO_3~-/TN was less than 0.1and(NH_4~++NO_3~-)/TN was more than 0.5.Therefore,NH_4~+and TN could be used as the main monitoring indicators,and NO_3~-as an auxiliary indicator for the prevention and control of farmland water pollution.Adding a certain concentration of PASP-Ca had slow release effects for the changes of nitrogen concentrations in surface water of paddy field,while the effects of PASP-Ca at0.3%concentration level was relatively better,the reduction rates of NH_4~+and TN in surface water of paddy field were 3.452mg/(L·d)and 4.806mg/(L·d)respectively.Compared with apply nitrogen only(CK),the reduction rates by 11.68%and 16.25%.Meanwhile,the average concentration of NH_4~+was6.999mg/L,which was 3.88%lower compared with CK.The average concentration of NO_3~-was 0.396mg/L,which was 24.83%lower compared with CK.The average concentration of TN was 20.077mg/L,which was 3.10%higher compared with CK.The dynamic changing trends of NH_4~+and TN concentrations with time could be expressed by logarithmic equations.After nitrogen application,the TN concentrations in paddy field decreased logarithmically with time,while the concentrations of NH_4~+increased logarithmically in 3days,and then decreased logarithmically with time.9days after nitrogen application was the key stage to prevent nitrogen loss in surface water of paddy field.
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