Evaluation of the efficiency of oil radish agrofitocenosis construction by the factor of reproductive effort

Yaroslav H. Tsytsiura

Abstract: The expediency and capability of application of criteria of reproductive effort (RE) and index of vitality of coenopopulation (IVC) of the reproductive part of plants for effective estimation of vitality tactique of oilseed radish agrophytocenoses of different technological construction (row spacing (15 and 30 cm) and seeding rates (4.0, 3.0, 2.0, 1.0 mln of germinable seeds per ha under the row spacing of 15 cm, and 2.0, 1.5, 1.0, 0.5 million of germinable seeds under row spacing of 30 cm) against the background of four variants of mineral nutrition (no fertilizer- N90P90K90 with an equal interval of 30 kg of active ingredient per ha of) were generalized. Based on the evaluation of the vitality tactics dynamics in a specific cenosis, the most expedient technological intervals of seeding parameters and fertilization of oilseed radish were determined to ensure the fulfillment of the reproductive individual potential of plants in combination with their density per unit of area and final maximum level of the biological yield capacity. An effective quantitative regulation of the application of mineral fertilizers for the appropriate variants of the planting method and seeding rates was substantiated.

Keywords: index of vitality; oilseed radish; reproductive effort; reproductive strategy; vitality

Date published: 2019-12-19