Morpho-physiological features of the action of the drug CCC 750 on winter wheat plants in crops

Abstract

The retardants preparations on cereal crops prevent lodging, help to level the height of productive stems, ensure their simultaneous ripening and affect the crop yield. The aim of the research was to study the effect of CCC 750 on the parameters of growth, photosynthetic activity and productivity of winter wheat in the conditions of the south of the Republic of Moldova. The drug is a growth regulator of the retardant type, the active substance of which is chlormequat chloride, in the concentration -750 g/l. The studies were carried out under the conditions of a field production experiment on sowing of winter wheat of the Kuyalnik variety of intensive type in the SRL "Terra-Vitis" of the Cahul region, on an area of more than 200 hectares. The period of application of the drug is the middle of tillering before the appearance of the first internode (stage 25-31). The consumption of the preparation is 1liter per 250liters of water per hectare. Control - without treatment of crops. The predecessor is winter rapeseed. In the main phases of ontogenesis exit into the tube and formation of an ear, determined the parameters of growth and photosynthetic activity of winter wheat plants of the Kuyalnik variety, at the end of the growing season - the elements of productivity and yield. We found that the use of the retardant type CCC 750 on winter wheat crops leads to a change in the growth parameters of shoots and leaf surface. So, in the heading phase, the height of the plants, the length of the stem change insignificantly, they are at the control level.