Response of Soil Based Cations and Carbon and Nitrogen Contents to Nitrogen Addition Under Two Land Use Patterns in the Three Gorges Reservoir Area

ZHENG Zhijie; LIU Renyan; CHEN Ning; XIONG Xingjun; YU Huiliang; YAN Ziwei; XU Han; HU Ronggui; LIN Shan

doi:10.13870/j.cnki.stbcxb.2023.01.026

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Response of Soil Based Cations and Carbon and Nitrogen Contents to Nitrogen Addition Under Two Land Use Patterns in the Three Gorges Reservoir Area

更新时间：2025-03-12

- Response of Soil Based Cations and Carbon and Nitrogen Contents to Nitrogen Addition Under Two Land Use Patterns in the Three Gorges Reservoir Area
- Vol. 37, Issue 1, Pages: 197-203(2023)
- 作者机构：
  
  1. 华中农业大学资源与环境学院, 农业部长江中下游耕地保育重点实验室,武汉,430070
  2. 咸宁市生态环境局高新区分局,湖北,咸宁,437199
  3. 中国电建集团昆明勘测设计研究院有限公司,昆明,650051
  4. 神农架金丝猴保育生物学湖北省重点实验室,湖北,神农架,442421
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.01.026
  CLC： S153.6
- Published：2023
- 稿件说明：
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ZHENG Zhijie, LIU Renyan, CHEN Ning, et al. Response of Soil Based Cations and Carbon and Nitrogen Contents to Nitrogen Addition Under Two Land Use Patterns in the Three Gorges Reservoir Area[J]. 2023, 37(1): 197-203.
DOI：

ZHENG Zhijie, LIU Renyan, CHEN Ning, et al. Response of Soil Based Cations and Carbon and Nitrogen Contents to Nitrogen Addition Under Two Land Use Patterns in the Three Gorges Reservoir Area[J]. 2023, 37(1): 197-203. DOI： 10.13870/j.cnki.stbcxb.2023.01.026.

摘要

为探究三峡库区2种土地利用方式下土壤交换性盐基离子及土壤碳氮含量对氮添加的响应

以湖北省秭归县的林地和果园土壤为研究对象

进行室内土柱淋溶模拟试验

研究4种不同氮添加量(0

120

200 kg/(hm2·a))下

土壤中交换性Ca2+、Mg2+、Na+、K+以及NO3--N、DOC的变化。结果表明:随着氮添加量的增加

林地土壤中的交换性盐基离子淋失量显著增加(p<0.05)

而果园土壤中的交换性盐基离子淋失量无显著变化

且林地土壤中交换性盐基离子淋失总量与各盐基离子淋失量均高于果园土壤;经N1、N2、N3处理后

与对照组(N0)相比

林地土壤中的交换性盐基离子淋失总量分别增加1.78%

4.45%

8.49%

且NO3--N淋失量分别增加89.21%

77.73%

157.25%

说明氮添加通过加剧土壤中NO3--N的淋失带走土壤中交换性阳离子;林地土壤DOC累计淋失量经N2、N3处理分别降低1.15%

9.53%

果园土壤DOC累计淋失量经N1、N2、N3处理分别降低15.55%

5.88%

17.16%;氮添加下

与人为干扰的果园土壤相比

相对自然状态下的林地土壤中交换性盐基离子淋失量对氮添加的响应更敏感。研究表明氮添加量的增加提高林地土壤交换性盐基离子与NO3--N的淋失量

减少林地与果园土壤DOC的淋失量。

Abstract

To investigate the response of soil exchangeable salt-based ions and soil carbon and nitrogen content to nitrogen addition under two land use modes in the Three Gorges reservoir area

the changes of soil exchangeable Ca2+

Mg2+

Na+

K+ and NO3--N

DOC in forest and orchard soils in Zigui County

Hubei Province were investigated by indoor soil column leaching simulation experiments at four different nitrogen additions. The results showed that with the increasing of nitrogen addition amount

the leaching loss amount of exchangeable base cations in the forest soil increased significantly (p < 0.05)

while that in the orchard soil did not change significantly. The total leaching loss amount of exchangeable base cations and the leaching loss amount of each base ion in the forest soil were higher than those in the orchard soil. Compared with the blank control (N0)

in the forest soil under the three nitrogen additions (N1

N2 and N3)

the total leaching loss amount of exchangeable base cations increased by 1.78%

4.45% and 8.49%

respectively

and the leaching loss amount of NO3--N increased by 89.321%

77.73% and 157.25%

respectively

indicating that nitrogen addition increased the leaching loss of NO3--N from the soil and thus took away exchange cations from the soil. The cumulative loss of DOC from forest soils decreased by 1.15% and 9.53% under N2 and N3 treatment

respectively

while it in orchard soils decreased by 15.55%

5.88% and 17.16% under N1

N2 and N3 treatment

respectively. Compared with orchard soils disturbed by human

the leaching amount of exchangeable based cations in forest under a relatively natural state was more sensitive to nitrogen addition. The research showed that the increasing of nitrogen addition increased the leaching loss amount of exchangeable base cations and NO3--N in forest soil and decreased the leaching loss amount of DOC in forest and orchard soils.

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