Dirvožemio mikrobiologinės ir fizikinės savybės įvairiose žemės dirbimo sistemose / | Soil microbiological and physical properties in various tillage systems.
2006
Cesevičius, Gintautas, | Janušauskaitė, Dalia,
The present paper provides the data on soil biological activity and soil physical properties as affected by crop residues and the tillage systems differing in intensity on a light loam Endocalcari-Epihypogleyic Cambisol during the period of 2004-2005. It was revealed that in the conventional deep ploughing tillage plots the contents of ammonificators was by 15-19 % and of micromycetes by 11 % higher than those in the ploughless tillage plots. In the second experimental year the highest content of cellulose-decomposing microorganisms (2.90 thous. g-1) was also recorded in the deep ploughing plots. The use of shallow stubble cultivation in combination with pre-sowing cultivation for seed bed preparation reduced the content of cellulose decomposing microorganisms by 11 % compared with conventional tillage and by 20 % compared with sowing with a rotary cultivator. Direct drilling reduced the content of cellulose-decomposing microorganisms by 29 %. Crop residues increased the population of micromycetes by 24-40 %. In the second experimental year the crop residues increased the content of ammonificators by 20 %.
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