Kipsi maanparannusaineena – hyödyt ja haitat maan kasvukunnolle

Translated title of the contribution: Gypsum as a soil amendent - effects on soil health

Tuomas J Mattila, Veera Manka, Jukka Rajala

Research output: Book/ReportCommissioned report

Abstract

Gypsum has been used as a fertilizer and soil amendment for centuries due to it’s calcium and sulfur content. In addition to the fertilizer effect, gypsum can be used to reduce high magnesium and aluminum concentrations in soil and to improve soil structure. However, gypsum also increases the leaching of magnesium and potassium from soil, which can increase nutrient deficiencies. With high use amounts phosphogypsum can disturb soil biological activity. This report reviews scientific literature on the effects of gypsum on soil. Experimental results on the effect of gypsum on soil health are presented from a series of tests on high magnesium clay soils with poor structure. In addition, the overall applicability of gypsum to different soils is evaluated by using a set of 1068 soil test results from different parts of Finland. Based on the results gypsum did not present problems for soil microbiology, nutrient concentrations or plant nutrient uptake, when it was used with moderate amounts on clay soils with high magnesium concentrations. Gypsum also was found to work as a sulfur fertilizer, elevating the concentrations for several years after application. Gypsum may cause problems if it applied on soils with low magnesium or potassium levels. Based on the multi-farm assessment of soil tests, gypsum may be beneficial on 0–50% of each farms soils and may cause nutrient deficiencies on 0–73% of soils, depending on soil fertility. In order to maximize the benefits of gypsum, it should be targeted on high magnesium clay soils with low levels of sulfur.
Translated title of the contributionGypsum as a soil amendent - effects on soil health
Original languageFinnish
PublisherHelsingin yliopisto Ruralia-instituutti
Number of pages30
ISBN (Electronic)978-951-51-3772-2
Publication statusPublished - 2019
MoE publication typeD4 Published development or research report or study

Publication series

NameRaportteja / Helsingin yliopisto, Ruralia-instituutti
PublisherHelsingin yliopisto, Ruralia-instituutti
No.192
ISSN (Electronic)1796-0630

Fields of Science

  • 415 Other agricultural sciences

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