Effect of irrigation regime and level of fertilization on morphological indicators and precocity of tomato greenhouse production

Antoniya Stoyanova, Rumen Bazitov, Miroslava Ivanova, Nikolai Valchev

Abstract: The main aims of this study is to analyze the effects of different irrigation regimes and norms of fertilization on morphological indicators and precocity of tomatoes, greenhouse production. The study of the influence of the irrigation regime was carried out against the background of different levels of fertilization. The experiment is derived by the block method on a flat surface according to scheme 110 + 50 + 35 with the size of the plot of 10 m2. The irrigation water was realized using a drip irrigation system with built-in droplets of 0.10 cm. In the first experimental year, 33 irrigations with an irrigation rate of 4950 m3/ha were delivered. The irrigation rate in the second year is 4050 m3/ha, realized through 27 irrigations. The size is dependent on the length of the growing season and on the need to irrigate in the optimum variant. The power of influence of the interaction of the factors irrigation and fertilization is established on the indicator plant height – it was 77.9%, average for the study period. Factors in relation to other morphological indicators are with less force of impact. It was found that a strong influence on the variation of the trait has a factor fertilization, the force of impact by 81% for the 1st harvest. Established role of the factor irrigation average for the period, with a high degree of reliability, is 91.8% on the 2nd harvest. The high degree of influence of the irrigation factor on the 3rd harvest indicator is established, which is 86.9%, average for the period. According to the one-factor dispersion analysis, the influence of both factors (irrigation and fertilization) separately, as well as their interaction, statistically proved with a very high degree of significance (p ≤ 0.001) is the impact on the “total yield” indicator. The fertilization has the strongest influence on the variation of the trait, with the force of impact 99% for the indicator “total yield”.

Keywords: greenhouse tomatoes, irrigation, fertilization, power of influence

Date published: 2021-02-17