ESTIMATION OF YIELD AND STABILITY OF VARIETIES OF COMMON WINTER WHEAT GROWN UNDER ORGANIC AND CONVENTIONAL AGRICULTURE

Abstract

In the period 2012-2015 IPGR - Sadovo examined the yields and stability of 24 varieties of winter wheat (Triticum aestivum L.). The experiments were carried out on the experimental field of the IPGR - Sadovo under the conditions of organic and conventional agriculture. The purpose of the study is to assess the yield and stability of varieties of common winter wheat grown under the conditions of organic and conventional farming. The results of this test give us the right to recommend varieties of common winter wheat as suitable for organic farming.

The influence of the climatic differences of the years on the yield of grain from winter wheat varieties is the strongest – 46,7% of the total variation. The effect of the type of farming is (organic and conventional) is 27,9% and the varieties – 5,5%. In the conditions of organic farming, the varieties of Sadovo 1, Momchil, Ioana, Niki, Prelom, Diamant, Boryana, Yunak, Petya, Guinness, Geya 1, Lucyl, Tsarevets and Enola received positive assessments. These varieties could be grown in organic farming. They combine better grain yields with better stability over the years of the study.