Effect of Different pH Precipitation and Nitrogen Input on Soil Buffer Capacity of Hydromorphic Paddy Soil

WANG Ji-dong; CHEN Dan-yan; ZHANG Yong-chun; NING Yun-wang; XU Xian-ju; ZHANG Hui; HU Yong-hong

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Effect of Different pH Precipitation and Nitrogen Input on Soil Buffer Capacity of Hydromorphic Paddy Soil

更新时间：2024-11-07

- Effect of Different pH Precipitation and Nitrogen Input on Soil Buffer Capacity of Hydromorphic Paddy Soil
- Vol. 25, Issue 2, (2011)
- 作者机构：
  
  江苏省农业科学院农业资源与环境研究所,江苏,南京,210014
- 作者简介：
- 基金信息：
- DOI：
  CLC： S153.4S147.2P332.1
- Published：2011
- 稿件说明：
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WANG Ji-dong, CHEN Dan-yan, ZHANG Yong-chun, et al. Effect of Different pH Precipitation and Nitrogen Input on Soil Buffer Capacity of Hydromorphic Paddy Soil[J]. 2011, 25(2).
DOI：

WANG Ji-dong, CHEN Dan-yan, ZHANG Yong-chun, et al. Effect of Different pH Precipitation and Nitrogen Input on Soil Buffer Capacity of Hydromorphic Paddy Soil[J]. 2011, 25(2). DOI：

摘要

以太湖地区典型水稻土——水耕铁渗人为土为供试材料

通过添加CaCO3和H2SO4培养及滴定的方法

研究不同pH降雨和施氮对土壤酸碱缓冲体系的影响。结果显示

土壤在添加CaCO3和H2SO4培养后进行不同量酸碱滴定

土壤在pH 4.0~7.5的突跃范围内与酸碱加入量呈显著的线性相关

表明该测定方法对供试土壤适用。同时施氮和降雨对土壤的酸化都有加速作用

各处理0-40 cm层土壤酸碱缓冲容量为1.91~2.20 cmol/kg

增加施氮量、降低降雨pH都降低土壤的酸碱缓冲容量

且土壤酸碱缓冲容量与盐基淋出量呈显著负相关关系

但不同酸度降雨对土壤酸度变化及酸碱缓冲容量变化影响主要为0-20 cm层

而对20-40 cm层影响较小;而施氮除影响土壤pH及酸碱缓冲容量的0-20 cm层外

还影响到20-40 cm层。表明研究土壤处在以盐基离子为主的酸碱缓冲体系

在此体系下

施氮或氮沉降对土体的影响比酸沉降更为深入。

Abstract

CaCO3 and H2SO4 amendment and titration method to study the soil acidification buffer capacities under different pH 2.5

4.5

6.5 precipitations combined with nitrogen rates with 0

150

300 mg/kg

respectively

in hydromorphic paddy soil.Results showed that soil exerting silicate and base cations primary buffering system

and the relationship between the CaCO3 and H2SO4 amendment rates and soil pH for treatment with different pH rainfall and nitrogen rates were all significant and had high linear regression corre...

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