Воден режим, биомаса и добив на съвременни сортове обикновена зимна пшеница, отгледани в условия на изкуствено почвено засушаване (засушник) | Relationship between Water Regime, Biomass and Yield of Recent Cultivars Common Winter Wheat Grow in Condition of Controlled Irrigation

Bulgarian. During the period 2010 – 2011 years in IPGR, Sadovo were conducted trial in greenhouse with six recent varieties common winter wheat. The subject of study was a cultivars Guinness, Yunak, Lusil, Geya-1, Nikki and Katya that are create in IPGR. Were examined some indicators of water exchange, biomass and yield of plants subjected to drought during phases ear formation and grain filling. The same scheme of examination was done for plants that are watered controlled throughout the whole growing season. Eight drought tolerance indices including YSI, YI, STI, GMP, SSI, MP, TOL and HMP were calculated. The indices were adjusted based on grain yield under drought condition and normal conditions in greenhouse. From the results obtained for the indices was compute PC analyzes. Were separated two main components as follow for potential yield and drought tolerance “component one” and stress tolerant “component two”. The cultivars Guinness and Geya-1 have highest values by component one. This makes them suitable for growing both in normal conditions and during drought.

English. During the period 2010 – 2011 years in IPGR, Sadovo were conducted trial in greenhouse with six recent varieties common winter wheat. The subject of study was a cultivars Guinness, Yunak, Lusil, Geya-1, Nikki and Katya that are create in IPGR. Were examined some indicators of water exchange, biomass and yield of plants subjected to drought during phases ear formation and grain filling. The same scheme of examination was done for plants that are watered controlled throughout the whole growing season. Eight drought tolerance indices including YSI, YI, STI, GMP, SSI, MP, TOL and HMP were calculated. The indices were adjusted based on grain yield under drought condition and normal conditions in greenhouse. From the results obtained for the indices was compute PC analyzes. Were separated two main components as follow for potential yield and drought tolerance “component one” and stress tolerant “component two”. The cultivars Guinness and Geya-1 have highest values by component one. This makes them suitable for growing both in normal conditions and during drought.