Effect of liquid humus and calcium sulphate on soil aggregation

An Ultic Haploxeralf soil collected from ridges built into the slopes of the Coastal Mountain Range of Central Chile was used in applications of humic and fulvic acids (HFA) extracted from sludge from sewage treatment plants, in combination with gypsum (CaSO4). A total of 12 treatments were applied...

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Autores principales:	Norambuena,M, Neaman,A, Schiappacasse,M.C, Salgado,E
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2014
Materias:	Erosion humic acid gypsum contour farming
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000300016
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spelling	oai:scielo:S0718-951620140003000162015-03-31Effect of liquid humus and calcium sulphate on soil aggregationNorambuena,MNeaman,ASchiappacasse,M.CSalgado,E Erosion humic acid gypsum contour farming An Ultic Haploxeralf soil collected from ridges built into the slopes of the Coastal Mountain Range of Central Chile was used in applications of humic and fulvic acids (HFA) extracted from sludge from sewage treatment plants, in combination with gypsum (CaSO4). A total of 12 treatments were applied by combining four doses of HFA (0, 20, 30 and 40 t ha-1) with three doses of gypsum (0, 1.2 and 6.0 t ha-1). The effect of these treatments was assessed using three indicators of the degree of soil aggregation: macroporosity (MA), bulk density (Da) and microinfiltration (MI). The experiment was set up in a laboratory using a completely randomised design (CRD). Factorial variance analysis was also performed using two factors: gypsum in three doses and HFA in four doses. For all three indicators, MA, Db and MI, it can be seen that there is interaction between the HFA treatments and the gypsum treatments in the studied soil. The macroporosity increased with HFA treatments with 20 or 30 t ha-1 (9%) and with gypsum of 1.2 t ha-1 plus 20 t ha-1 HFA (11%). It can also be seen that the gypsum treatments have no effect on Db when HFA is not applied. Microinfiltration is the variable that shows the greatest effects from the treatments applied. The results also clearly show that high amounts of HFA (40 t ha-1) and of gypsum (6.0 t ha-1) cancel out the differential effects and cause negative effects on the three indicators for the studied soils. The use of liquid humus and its combination with calcium sulphate (20/1.2 t ha-1) improves soil aggregation.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.14 n.3 20142014-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000300016en10.4067/S0718-95162014005000056
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Erosion humic acid gypsum contour farming
spellingShingle	Erosion humic acid gypsum contour farming Norambuena,M Neaman,A Schiappacasse,M.C Salgado,E Effect of liquid humus and calcium sulphate on soil aggregation
description	An Ultic Haploxeralf soil collected from ridges built into the slopes of the Coastal Mountain Range of Central Chile was used in applications of humic and fulvic acids (HFA) extracted from sludge from sewage treatment plants, in combination with gypsum (CaSO4). A total of 12 treatments were applied by combining four doses of HFA (0, 20, 30 and 40 t ha-1) with three doses of gypsum (0, 1.2 and 6.0 t ha-1). The effect of these treatments was assessed using three indicators of the degree of soil aggregation: macroporosity (MA), bulk density (Da) and microinfiltration (MI). The experiment was set up in a laboratory using a completely randomised design (CRD). Factorial variance analysis was also performed using two factors: gypsum in three doses and HFA in four doses. For all three indicators, MA, Db and MI, it can be seen that there is interaction between the HFA treatments and the gypsum treatments in the studied soil. The macroporosity increased with HFA treatments with 20 or 30 t ha-1 (9%) and with gypsum of 1.2 t ha-1 plus 20 t ha-1 HFA (11%). It can also be seen that the gypsum treatments have no effect on Db when HFA is not applied. Microinfiltration is the variable that shows the greatest effects from the treatments applied. The results also clearly show that high amounts of HFA (40 t ha-1) and of gypsum (6.0 t ha-1) cancel out the differential effects and cause negative effects on the three indicators for the studied soils. The use of liquid humus and its combination with calcium sulphate (20/1.2 t ha-1) improves soil aggregation.
author	Norambuena,M Neaman,A Schiappacasse,M.C Salgado,E
author_facet	Norambuena,M Neaman,A Schiappacasse,M.C Salgado,E
author_sort	Norambuena,M
title	Effect of liquid humus and calcium sulphate on soil aggregation
title_short	Effect of liquid humus and calcium sulphate on soil aggregation
title_full	Effect of liquid humus and calcium sulphate on soil aggregation
title_fullStr	Effect of liquid humus and calcium sulphate on soil aggregation
title_full_unstemmed	Effect of liquid humus and calcium sulphate on soil aggregation
title_sort	effect of liquid humus and calcium sulphate on soil aggregation
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000300016
work_keys_str_mv	AT norambuenam effectofliquidhumusandcalciumsulphateonsoilaggregation AT neamana effectofliquidhumusandcalciumsulphateonsoilaggregation AT schiappacassemc effectofliquidhumusandcalciumsulphateonsoilaggregation AT salgadoe effectofliquidhumusandcalciumsulphateonsoilaggregation
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Effect of liquid humus and calcium sulphate on soil aggregation

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