Abstract
Summary In 3-year research (2011–2013) carried out in static field experiment on luvisol medium soil in Production and Experimental Plant Balcyny near Ostroda town, the response of two varieties of spring barley (Conchita and Mercada) to a chemical protection against weeds (H), and combined protection from weeds and diseases (HF) was evaluated. The comparisons of responses were carried out in two following crop sequence systems: A) the cultivation of spring barley varieties in 6-field crop rotation: sugar beet – maize – spring barley – pea – winter rape – winter wheat and B) the cultivation in 45–47-year monoculture. The cultivation of barley without any protection (O) in both crop sequence systems was a control object. The research showed that the crop sequence system significantly differentiated the response of varieties to applied levels of a protection. Significantly higher increase of grain yield of spring barley varieties as a result of herbicides application as well as combined application of herbicides and fungicides was reported in the monoculture than in the crop rotation. In the both crop sequence systems the applied protection levels caused higher increase of yields for Mercada variety. In its case a significantly higher yield of grain was also achieved.
Highlights
Bałcyny near Ostróda town, the response of two varieties of spring barley (Conchita and Mercada) to a chemical protection against weeds (H), and combined protection from weeds and diseases (HF) was evaluated
The research showed that the crop sequence system significantly differentiated the response of varieties to applied levels of a protection
Higher increase of grain yield of spring barley varieties as a result of herbicides application as well as combined application of herbicides and fungicides was reported in the monoculture than in the crop rotation
Summary
Bałcyny near Ostróda town, the response of two varieties of spring barley (Conchita and Mercada) to a chemical protection against weeds (H), and combined protection from weeds and diseases (HF) was evaluated. Porównania reakcji dokonano w dwóch systemach następstwa roślin: A) uprawa odmian jęczmienia jarego w 6-polowym płodozmianie: burak cukrowy – kukurydza – jęczmień jary – groch siewny – rzepak ozimy – pszenica ozima i B) uprawa w 45–47-letniej monokulturze. Istotnie większe zwyżki plonów ziarna odmian jęczmienia jarego w wyniku stosowania herbicydów oraz łącznie herbicydów i fungicydów uzyskano w monokulturze niż w płodozmianie.
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