Dynamics of leaf area in plants of soybean depending on seeding rate and methods of sowing

Authors

  • О. О. Mikheeva Kharkiv National Agrarian University named after. VV Dokuchaev
  • А. О. Rozhkov Kharkiv National Agrarian University named after. VV Dokuchaev
  • V. G. Mikheev Kharkiv National Agrarian University named after. VV Dokuchaev

DOI:

https://doi.org/10.31548/bio2019.01.009

Keywords:

soybean, variety, seed rate, row spacing, weather conditions, the area of leaves

Abstract

An essential condition for obtaining the high yields of soybean is the availability of the optimal area of the leaf surface in plants. An important condition for obtaining the optimal area of leaves in plants is the formation of a certain density of plants per unit area. It has already known that the optimal area of the leaf surface in plants, which resulted in high yields of soybean seeds, was an area within the range of 40–50 ths. m2/ha.

The purpose of the research was to study the complex influence of different variants of sowing norms and methods of sowing soybeans of different varieties on the dynamics of leaf area in plants. The researches were conduct during 2015–2018 under the conditions of the Scientific Research Center "Experimental Field" KNAU nd. a V.V Dokuchaev in accordance with the generally accepted methodology.

The influence of weather conditions, varietal characteristics and seed sowing standards, and sowing methods on the dynamics of leaf area formation during the researchers has already been determined. In the more favorable area in plants of the year 2016, the area of the leaves was close to the optimum, namely to 40.5 ths. m2/ha in the soybean plants of the variety Baika and up to 38.5 ths. m2/ha in the soybean plants of the variety Annushka. In less favorable 2018, the area of leaflets was 10.7 and 11.3 ths. m2/ha less in soybean plants in varieties Baika and Annushka, respectively.

During the four years of observation, in a phase of formation beans, the largest area of leaves in soybean plants of the variety Baika was at a standard seeding method with a maximum rate of sowing ‑ 29.8–40.5 ths. m2/ha. The smallest was in the sowing with an intermediate row of 70 cm and the norm of sowing 800 ths. pcs./ha – 23.8–28.5 ths. m2/ha in soybean plants the variety Annushka. In the crops of soybean variety Annushka plants gave way to the level of leaf area. There were smaller than plants of soybean variety Baika, the difference amounted to 6.0 ths. m2/ha.

References

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Published

2019-02-28

Issue

Vol. 11 No. 1-2 (2019)

Section

Agronomy

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