Žemės ūkio mokslai / Agricultural Sciences
 ISSN 1392-0200 |
2003 m. Nr. 3 Changes of soil-available P and K on eroded slopes of West Lithuania
Levels of soil-available P and K
responses to traditional deep plough tillage compared to three sustainable
tillage systems with shallow ploughing to winter cereals and various
combinations of ploughless tillage and glyphosate spraying to spring cereals
were investigated at three fertilisation levels in a crop rotation on sloping,
nutrient-deficient agricultural land during 1995-2000 at the Kaltinėnai
Research Station of the Lithuanian Institute of Agriculture. The soil is an
Alboluvisol with sandy loam laying over sandy loam texture.Sustainable tillage caused weak
stratification of soil P content at the end of 4th year of experiment.
Sustainable tillage decreased soil erosion by 68-90%. In the sustainable
tillage systems the fertiliser had no significant positive influence on soil P
and K changes in the 0-10 cm layer.
The sustainable tillage systems without deep soil mixing predetermined the best positive changes of avalable P and K in the 10-20 cm soil layer.The determinants of soil P changes in the 0-10 cm layer were presowing tillage depth and soil P losses; in the 10-20 cm layer these were changes of soil bulk density, primary tillage depth, P offtake and soil P losses. The determinants of soil K changes in the 0-10 cm layer were presowing tillage depth and K offtake; in the 10-20 cm layer these were changes of aggregation characteristics, presowing tillage depth, K offtake and soil K losses. Keywords: tillage, fertilisation, P offtake, cereals, sloping landscape, Path analysis |
Numeriai:
2012 - T.19 Nr.1 2011 - T.18 Nr.1, Nr.2, Nr.3, Nr.4 2010 - T.17 Nr.1-2, Nr.3-4 2009 - T.16 Nr.1-2, Nr.3-4 2008 - T.15 Nr.1, Nr.2, Nr.3, Nr.4 2007 - T.14 Nr.1, Nr.2, Nr.3, Nr.4, Nr.Priedas 2006 Nr.1, Nr.1.Priedas, Nr.2, Nr.3, Nr.4 2005 Nr.1, Nr.2, Nr.3, Nr.4 2004 Nr.1, Nr.2, Nr.3, Nr.4 2003 Nr.1, Nr.2, Nr.3, Nr.4 2002 Nr.1, Nr.2, Nr.3, Nr.4 2001 Nr.1, Nr.2, Nr.3, Nr.4 |