Estimation of adaptive features (stability and plasticity) of pear varieties

Abstract

In the conditions of damp subtropics of Russia within 2008-2013 the adaptive potential of pear varieties for different periods of the maturing expressed by stable fructification and high productivity was studied. The estimation of ecological parameters adaptive properties of pear on productivity in contrast conditions of cultivation was given. The index of conditions of formation of crop for each varieties was defined. The high-quality differences were established. The varieties, capable to provide high and stable productivity in various conditions of environment, were revealed. The necessity for intensive varieties was shown. It is recommended to use varieties with the lowered responsiveness on conditions of environment on an extensive background where they will give a return maximum at a minimum of expenses.