Effects of Acidified Zeolite on Urea Nitrogen Leaching and Nitrogen Utilization in Maize Kernel

KONG Baishu; JIAO Shuying; LI Yongqiang; LIN Haitao; LI Ye; FU Chunyu

doi:10.13870/j.cnki.stbcxb.2021.02.040

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Effects of Acidified Zeolite on Urea Nitrogen Leaching and Nitrogen Utilization in Maize Kernel

更新时间：2025-03-12

- Effects of Acidified Zeolite on Urea Nitrogen Leaching and Nitrogen Utilization in Maize Kernel
- Vol. 35, Issue 2, Pages: 303-308(2021)
- 作者机构：
  
  1. 山东农业大学资源与环境学院,山东,泰安,271018
  2. 山东省农业科学院农业资源与环境研究所,济南,250100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.02.040
  CLC： S143.1
- Published：2021
- 稿件说明：
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KONG Baishu, JIAO Shuying, LI Yongqiang, et al. Effects of Acidified Zeolite on Urea Nitrogen Leaching and Nitrogen Utilization in Maize Kernel[J]. 2021, 35(2): 303-308.
DOI：

KONG Baishu, JIAO Shuying, LI Yongqiang, et al. Effects of Acidified Zeolite on Urea Nitrogen Leaching and Nitrogen Utilization in Maize Kernel[J]. 2021, 35(2): 303-308. DOI： 10.13870/j.cnki.stbcxb.2021.02.040.

摘要

在尿素减量施用条件下，探究添加酸化沸石（SF）对氮素淋失及籽粒氮肥利用率的影响。通过等温吸附试验，结合土柱淋溶和玉米盆栽试验，研究酸化沸石对NH4+—N和NO3-—N的吸附性能，以及不同施氮梯度下，酸化沸石对氮素淋失和氮肥利用率的影响，试验分别设置农民习惯施肥（CN）、氮肥减量15%（CN1）、氮肥减量30%（CN2）3个施氮梯度并分别添加土重0.2%的酸化沸石（CN+SF、CN1+SF、CN2+SF）。结果表明，酸化沸石对NH4+—N和NO3-—N的最大吸附量分别为25.44，31.59 mg/g，吸附过程可用Langmuir模型较好拟合。在减氮15%和30%时，添加酸化沸石，使NH4+—N累计淋失量较CN1、CN2分别降低7.10%，8.76%。在减氮30%时，酸化沸石可有效降低NO3-—N累计淋失量，较CN2处理减少15.90%。酸化沸石可有效提高土壤氮素含量和玉米籽粒氮肥利用率，添加酸化沸石（CN+SF、CN1+SF、CN2+SF）较单施尿素（CN、CN1、CN2）籽粒氮肥利用率分别提高10.37%，20.79%，47.14%。综上，酸化沸石在减施尿素条件下可有效降低土壤氮素淋失，提高玉米籽粒氮肥利用率，具有一定的农艺价值。

Abstract

This study aims to investigate the effects of acidified zeolite (SF) on nitrogen leaching and nitrogen use efficiency of grain under the condition of urea reduction. The adsorption properties of acidified zeolite for NH4+—N and NO3-—N

and the effects of acidified zeolite on nitrogen leaching and nitrogen utilization under different nitrogen application gradients were studied by isothermal adsorption test

soil column leaching

and maize pot experiment. Three nitrogen reduction gradients were set up

i.e.

farmers' conventional fertilization (CN)

nitrogen reduction by 15% (CN1)

nitrogen reduction by 30% (CN2)

and 0.2% acidified zeolite was added to the three nitrogen reduction gradients (CN+SF

CN1+SF

and CN2+SF)

respectively. The results showed that the maximum adsorption capacities of NH4+—N and NO3-—N by acidified zeolite were 25.44 mg/g and 31.59 mg/g

respectively. The adsorption process could be well fitted by Langmuir model. When nitrogen was reduced by 15% and 30%

the cumulative leaching loss of NH4+—N with acidified zeolite was 7.10% and 8.76% lower than that of CN1 and CN2

respectively. Acidified zeolite could effectively adsorb NO3-—N only when nitrogen was reduced by 30%. The cumulative leaching loss of NO3-—N was 15.90% lower than that of CN2. The acidified zeolite could effectively improve soil nitrogen content and nitrogen use efficiency of maize grain. Compared with urea application (CN

CN1

and CN2)

adding acidified zeolite (CN+SF

CN1+SF

CN2+SF) increased nitrogen use efficiency of grain by 10.37%

20.79%

and 47.14%

respectively. Under the condition of reducing the use of urea

acidified zeolite can effectively reduce soil nitrogen leaching

improve nitrogen use efficiency of maize

and has potential agronomic value.

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Keywords

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