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Biochar partially offset the increased ammonia volatilization from salt-affected soil
Archives of Agronomy and Soil Science ( IF 2.4 ) Pub Date : 2020-07-02 , DOI: 10.1080/03650340.2020.1786537
Shimeng Liu 1 , Yawei Li 1, 2 , Junzeng Xu 1, 2, 3 , Wenjin Ma 1 , Boyi Liu 1 , Haiyu Wang 1 , Xiaoyin Liu 1 , Yajun Luan 1
Affiliation  

ABSTRACT

Ammonia (NH3) volatilization is one of the major forms of nitrogen (N) losses from soil after N fertilization, especially in salt-affected soil, which leads to low N use efficiency. To evaluate the effect of biochar on NH3 volatilization from salt-affected soil with two different N fertilizers (urea and ammonium sulfate (AS)), experiments were conducted with two salt-affected soils (electrical conductivity EC1:5 of 1.0 and 5.0 ds m−1, namely S1 and S2) and non-saline soil as control (S0, EC1:5 < 0.3 ds m−1). Biochar was applied to S1 and S2 at the dosage of 20 t ha−1. Results showed that increasing soil salinity significantly promoted NH3 volatilization by 38.7%–76.8% than control and AS treatments recorded higher NH3 volatilization than urea in all salinity levels. The addition of biochar decreased NH3 volatilization by 10.8%–20.9%. The proportion of cumulative NH3 volatilization in the first week to the whole experimental period was significantly higher in S1, and biochar addition can reduce the percentages of gaseous N losses. This study unravels the immense capability of salt-affected soil to aggravate N losses in the form of NH3 volatilization, and biochar can be used as a potential soil amendment in decreasing NH3 volatilization in salt-affected soil.



中文翻译:

生物炭部分抵消了受盐分影响的土壤中氨挥发的增加

摘要

氨 (NH 3 ) 挥发是施氮后土壤中氮 (N) 损失的主要形式之一,尤其是在受盐分影响的土壤中,会导致氮的利用效率低下。为了评估生物炭对两种不同氮肥(尿素和硫酸铵 (AS))盐影响土壤中NH 3挥发的影响,对两种盐影响土壤进行了实验(电导率 EC 1:5,分别为 1.0 和 5.0) ds m -1,即 S1 和 S2)和非盐渍土壤作为对照(S0,EC 1:5  < 0.3 ds m -1)。生物炭以20 t ha -1的剂量应用于S1 和S2 。结果表明,土壤盐分的增加显着促进了NH 3在所有盐度水平下,NH 3挥发比对照和 AS 处理高 38.7%–76.8% 。生物炭的添加使NH 3挥发量降低了10.8%–20.9%。S1中第1周累积NH 3挥发占整个实验期的比例显着较高,添加生物炭可以降低气态N损失的百分比。本研究揭示了受盐分影响的土壤以 NH 3挥发形式加剧 N 损失的巨大能力,并且生物炭可用作潜在的土壤改良剂以减少受盐分影响的土壤中的NH 3挥发。

更新日期:2020-07-02
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