Soil pore-water environment and CO2emission in aLuvisolas influenced by contrasting tillage

Autor:	Dalia Feiziene, Virginijus Feiza, Daiva Janusauskaite, Sarunas Antanaitis, Sigitas Lazauskas, Vytautas Seibutis, Skaidre Suproniene, Virmantas Povilaitis, Irena Deveikyte
Rok vydání:	2014
Předmět:	Topsoil business.product_category Conventional tillage Compaction Soil Science Soil science Soil type Tillage Plough Pore water pressure Agronomy Environmental science Porosity business Agronomy and Crop Science
Zdroj:	Acta Agriculturae Scandinavica, Section B — Soil & Plant Science. 64:350-359
ISSN:	1651-1913 0906-4710
DOI:	10.1080/09064710.2014.911952
Popis:	Little is known how contrasting tillage (deep ploughing, top- and sub-soil loosening with straight or bent leg cultivator [BLC], direct drilling [DD]) affect important soil physical properties (total porosity [TP], pore size distribution [PSD], water release characteristics [WRC]) and CO2 emissions from a Luvisol. The study was aimed to alleviate compaction on land that had been under reduced tillage for 4 successive years. Undisturbed core samples were collected from 5–10, 15–20 and 25–30 cm depths for soil WRCs, TP and pore-size distribution determination. A closed chamber method was used to quantify the CO2 emissions from the soil. Soil loosening with straight or BLC produced the highest total soil porosity (on average 0.48 m3 m−3) within 5–30 cm soil layer, while conventional tillage (CT) gave 6%, DD up to 25% reduction. Sub-surface loosening with a BLC was the most effective tool to increase the amount of macro- and mesopores in the top- and sub-soil layers. It produced 21% more macro- and mesopores ...
Databáze:	OpenAIRE
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