Water-holding capacity of Ribes aureum leaves in the conditions of Karaganda region

Abstract

Study of fruit plants and selection of species resistant to local climatic conditions is an important task for nursery development. In conditions of Central Kazakhstan there is a limited assortment of fruit plants, so it is necessary to select crops resistant, first of all, to arid climate. A promising species is Ribes aureum, characterized by rapid growth, undemanding soil conditions and resistance to diseases and pests. Under the conditions of Karaganda city, studies were conducted to assess the water content and water-holding capacity of this crop during the growing season — from May to September. The results showed that the maximum values of water- holding capacity of Ribes aureum leaves are observed in May and June months, which is associated with the youth of leaves, their physiological activity, as well as cool and wet weather. In July, water-holding capacity starts to decrease, which can be attributed to hot conditions. However, in August and September, an increase in water-holding capacity can be observed due to abundant precipitation and cooler weather. Indicators of water regime show that the crop is highly resistant to water deficit.