Effect of pre-plant soil cultivation on resistance of strawberry agrocyanosis, variety productivity and fruit quality

Abstract

The purpose of the item under consideration in investigation of effect resulted from preplant introduction of gypsum, lime and biohumus on productivity marketability and growth processes of day-neutral strawberries and june bearing varieties. The investigations were carried out in open field on the soil characterized as black soils-leached, medium-humus, medium-strengt, heavy loamy on loess-like loam under lained de medium-grained sand with medium acid reaction of soil acidity (pHKCL4.9). The study was focused on strawberry plantations (planted in 2017) with ‘Flamenko’ and ‘San Andreas’ varieties and variants with preplant application of 1. Biohumus, 2. biohumus and dolomite powder, 3. biohumus, gypsum and lime. The analysis of experiment results over the period 2017-2018 showed that statistically reliable biological efficiency was found for applying the compositions of ameliorant on the strawberry varieties of different genotypic groups. Increase in yield in the studied variants was from 29.0-49.9 % % (day-neutral variety ‘San Andreas’) and within 20.9-33.7 % % (june-bearing variety ‘Flamenko’). The influence of soil ameliorants on fruit weight is less expressed in the studied varieties ‘Flamenko’ (6.4-16.0 %-%). Phutosanitary control of strawberry plantation state revealed such damaging factors of the varieties as thrips and dusky stink bug.