Effect of using a complex of agro-technical practices on Planosols
Ivan Dimitrov1 • Miroslav Ivanov1 • Iliyana Gerasimova1 • Martin Nenov1 • Vanya Lozanova1 • Ana Samodova2 • Hristina Georgieva2
1 Institute of Soil Science, Agrotechnologies and Plant Protection, Sofia, Bulgaria
2 State-owned enterprise, Experimental station of irrigated agriculture, Ivaylo, Pazardzhik, Bulgaria
Резюме
The problem of updating agricultural technology, particularly in the field of
agriculture, is important for agriculture. Alternative technology solutions that meet
the performance criteria are a prerequisite for successful economic activity.
The aim of the study is to determine the effect of the application of an agrotechnical
complex of events, which successfully supports the soil fertility of the
Planosoils and the sustainable level of productivity of the field crops. In the field experiment in the station for irrigation agricultural Pazardzhik Valley,
in three-polar crop rotation maize-barley-rape are studied three factors - soil tillage
system, mineral fertilization and ways of managing plant residues.
The study found that the moisture content of the soil was mainly influenced by the
type of treatment applied (loosening as a main plow and plowing as a pre-sowing)
and the use of plant residues. The over compaction found in the beginning of the
experiment in the 25-40 cm layer is partly overcome by performing a deep rupture
to the depth of 35 cm. Despite the short period of the study, there was a certain
decrease in the content of digestible potassium forms. The results show the activation
of the microbiological activity after planting of the plant residues - an increase
of the amount of the cellulose microorganisms and of the ammonifiable bacteria,
the most noticeable in the high fertilization rate and the intensive treatments. The
main part in the formation of crop rotation productivity is mineral fertilization. The
impact of the tillage system is more marked in the first year of maize and especially
during the third year of rape. Lack of fertilization influences yields significantly in
rapeseed compared to maize and barley.
