Agronomy Science (Dec 2003)
Wpływ systemów uprawy roli, poziomów nawożenia i ochrony na masę i skład chemiczny resztek pożniwnych jęczmienia jarego
Abstract
The field research was carried out in the years 19972000 in the farm Bezek near Chełm, a part of Agricultural University in Lublin. The experimental field was situated on light and sandy clay soil. The content of phosphorus in the soil was high, potassium - medium, magnesium - low. Humus content was 1.2%. The purpose of this work was to determine the influence of conventional and ploughless tillage system in crop rotation: potato - spring barley - winter rye upon the weight and chemical composition of post-harvest residues of spring barley in two differentiated fertilization and plant protection levels on light soil. The stubble and bedding weight after harvest was estimated on every plot in two randomly selected places of 400 sq. c. area. The root mass was determined after harvest by means of a steel cylinder of 400 cm2 down to 30 cm, dividing it 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 mesh sieve, then they were dried and weighed. It was stated that after the harvest spring barley accumulated significantly higher air dry mass of roots (74.2%) in 0-10 cm surface layer on light the soil than the in deeper layers. Basic fertilization and the plant protection level increases the dry matter of spring barley roots. The content of potassium and magnesium in spring barley roots was higher on the treatment with ploughless soil cultivation in comparison with conventional tillage. Basic fertilization and the plant protection level increases the content of phosphorus and magnesium in the roots of spring barley. The intensive chemical level increases the content of total nitrogen in the roots of spring barley in comparison with the basic one. Greater content of magnesium in the stubble and bedding of spring barley was found on the objects with ploughing tillage. The basic chemical level increases the content of phosphorus and magnesium in the stubble and bedding of spring barley in comparison with the intensive one.
