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作 者 ：樊军;郝明德

期 刊 ：植物营养与肥料学报 2002年 8卷 1期 页码：86-90

关键词：过磷酸钙；有效硫累积；淋溶；石灰性土壤；

Keywords:single superphosphate, available sulfur accumulation, SO 2- 4 leaching, limy soil,

摘 要 ：对设在黄土高原旱地黑垆土上不同N、P配比与用量的长期定位试验土壤剖面有效硫的分布与累积进行了研究。结果表明 ,长期施用不同量及不同配比的尿素与过磷酸钙肥料 ,对土壤剖面有效硫的含量影响明显 ,无硫投入的处理CK、N2、N4剖面有效硫含量低 ,平均分别为 7.73、10 .6 4、12 .16mg/kg ,分布均匀 ,而有硫投入的处理有效硫在剖面形成累积峰 ,最大含量可达 95.42mg/kg。大量的硫素随过磷酸钙施入土壤之后 ,部分以可溶无机硫酸盐形式被下渗水淋溶到土体的深层累积 ,累积量随施硫量的增加而增加 ,由于投入硫量大 ,在同一硫水平上 ,产量随氮肥用量增加而增加 ,但累积硫的量减少不多。石灰性土壤有效硫的下淋累积受作物、土壤、施肥、降水等多种因素影响 ,是长期的累积过程

Abstract:Accumulation and distribution of available sulfur (0.15% CaCl₂ extract) in the limy soil profile with a 15 year fertilization experiment were studied. The results showed that the sulfate distribution in the soil profile was different significantly with application of fertilizers, the accumulation were found in the treatments of sulfur application, the maximum content was 95.42 mg/kg. When amount of sulfur were put into soil, some of transformed into SO₄^2- and leached, which were affected by plant, soil, fertilization and precipitation, and it was a long term process.

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