Effects of Polyaspartic Acid Calcium Salt on the Dynamic Changes of NH

DONG Shijie; LU Yi; TANG Wanying; LIU Qi; CHENG Mengdi; ZHANG Qingguo; YANG Shuyun; MA Youhua

doi:10.13870/j.cnki.stbcxb.2018.06.030

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Effects of Polyaspartic Acid Calcium Salt on the Dynamic Changes of NH

更新时间：2025-03-12

- Effects of Polyaspartic Acid Calcium Salt on the Dynamic Changes of NH
- Vol. 32, Issue 6, Pages: 208-213(2018)
- 作者机构：
  
  1. 安徽农业大学资源与环境学院,合肥,230036
  2. 安徽农业大学理学院,合肥,230036
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.06.030
  CLC： X52;S511
- Published：2018
- 稿件说明：
移动端阅览
DONG Shijie, LU Yi, TANG Wanying, et al. Effects of Polyaspartic Acid Calcium Salt on the Dynamic Changes of NH[J]. 2018, 32(6): 208-213.
DOI：

DONG Shijie, LU Yi, TANG Wanying, et al. Effects of Polyaspartic Acid Calcium Salt on the Dynamic Changes of NH[J]. 2018, 32(6): 208-213. DOI： 10.13870/j.cnki.stbcxb.2018.06.030.

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（NH4+）、硝态氮（NO3-）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、NH4+和NO3-分别于第1，3，9天达到最大值，随后逐渐降低。NO3-/TN多在0.1以下，（NH4++NO3-）/TN多在0.5以上。因此，可以将NH4+和TN作为农田水污染防治的主要监测指标，NO3-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NH4+和TN的下降速率分别为3.452，4.806 mg/（L·d），与单施氮肥（CK）相比，分别降低了11.68%和16.25%；同时，NH4+的平均浓度为6.999 mg/L，较CK低了3.88%；NO3-的平均浓度为0.396 mg/L，较CK低了24.83%；TN的平均浓度为20.077 mg/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NH4+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。

Abstract

A barrels planted experiment was conducted to study the effects of PASP-Ca with different concentration levels on the dynamic changes of NH4+

NO3- and total nitrogen (TN) concentrations in surface water of paddy field. The result showed that the concentrations of TN

NH4+ and NO3- in the surface water of paddy field reached the maximum within 1 day

3 days and 9 days respectively after nitrogen application. NO3-/TN was less than 0.1 and (NH4++NO3-)/TN was more than 0.5. Therefore

NH4+ and TN could be used as the main monitoring indicators

and NO3- 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 at 0.3% concentration level was relatively better

the reduction rates of NH4+ and TN in surface water of paddy field were 3.452 mg/(L·d) and 4.806 mg/(L·d) respectively. Compared with apply nitrogen only (CK)

the reduction rates by 11.68% and 16.25%. Meanwhile

the average concentration of NH4+ was 6.999 mg/L

which was 3.88% lower compared with CK. The average concentration of NO3- was 0.396 mg/L

which was 24.83% lower compared with CK. The average concentration of TN was 20.077 mg/L

which was 3.10% higher compared with CK. The dynamic changing trends of NH4+ 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 NH4+ increased logarithmically in 3 days

and then decreased logarithmically with time. 9 days after nitrogen application was the key stage to prevent nitrogen loss in surface water of paddy field.

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