BIOLOGICAL FEATURES OF PEA VARIETIES AND LINES AND THEIR RESPONSE TO PLANTING DATES UNDER THE ALTAI REGION’S CONDITIONS

Pea (Pisum sativum) is one of the sources high-quality plant protein production. A wide range different complementary and stress resistant pea varieties need-ed for Altai Region which characterized by large terri-tory with zonality unstable climate. The research goal was to evaluate available varieties, identify best lines Region, determine their re-sponse on agricultural practices, including planting dates. set included 10 genotypes Russian foreign breeding. were planted in three dates -the first, second third ten-days May. On four-year average, following leafless forms had smallest height: Madonna (49.7 cm), Velvet (51.3 cm) L-37/99K(03) (52.3 cm). Leafy L-L-277, L-20/07-2, L-46/12, as expected, taller (88.0, 84.3 79.0 cm, respectively). average yields standard first date 1.59 t ha (Avans) 2.13 (Batrak). When May, increased 2.42 2.68 ha, respectively. L-L-277 line L-67/2 K-15 highest yields. Of variety indices. hybrid com-binations L-20/07-2 exceeded Avans herbage yield when High forage crop material among leafy morphotypes are produced both early late seeds more likely planting. studied ones.