Wpływ systemów uprawy roli na masę resztek pożniwnych jęczmienia jarego uprawianego na rędzinie

Abstrakt

The field research was carried out in the years 1994-1999 in the farm Bezek near Chełm, a part of Agricultural University in Lublin. The influence of three tillage systems: conventional, minimum tillage and zero tillage on the air dry weight of roots (from 0-30 cm soil layer) and post-harvest residues of spring barley cultivated in crop rotation horse of bean winter wheat-spring barley was estimated in the field experiment on the rendzina soil. The experimental plot area was 66 m² (to harvest 40 m²). The spring barley cultivar Klimek was sown in the number 3.4 mln grain per hectare. The stubble and bedding weight after harvest was estimated on every plot in two randomly selected places on 400 cm² area. The root mass was determined after harvest by means of a steel cylinder of 400 cm² down to 30 cm, with a division into the following layers: 0-10 cm, 10-20 cm, 20-30 cm. The roots were rinsed with running water with about 1 mm diameter mash sieve, then they were dried and weighed. It was stated that before harvest spring barley accumulated significantly higher air dry matter of roots in a 0-10 cm surface layer on rendzina soil than the deeper layers. In 1995 spring barley produced bigger root mass against the other years of the study. Tillage systems do not differentiate air-dry mass of roots and stubble and bedding of spring barley. A tendency for bigger production of the stubble mass and bedding of spring barley was found in reduced tillage than in conventional tillage and no-tillage. Reduced tillage and no-tillage in comparison to conventional tillage increased the mass of spring barley post harvest residues.