Abstract
The connection of moisture content in the soil to the total productivity of plants has been established. Indicators of photosynthetic activity of soy crops were higher in years, with better moisture resistance. Fluctuations in the net productivity of photosynthesis over the years ranged from 5.3 (the driest year) to 7.0 g/m2 day (a moisturizing year). The average indicator of the net productivity of photosynthesis during the years of favorable moisturizing was 6.5 g/m2•day, in arid years it decreased by 10.8%. The photosynthetic potential of soybean crops on average for 5 drought years was at the level of 2.5 million m2 / day during the period of branching - flowering, then it was reduced by 16%, which was a direct effect of lack of moisture in the soil. During the years of favorable soil moisture, the photosynthetic potential was quite high and remained for a longer period within 2.7 million m2 / day. The total height of plants in dry years was lower and amounted to 74.5% of sufficiently wet years. On average, 18.1 beans were formed on one plant in arid conditions, this indicator was - 29.0 beans with favorable moisture, which was higher by 60.2% compared to previous indicators. Losses from the fall of generative organs during the growing season were significant in dry years - 81.9, favorable for moisture - 78.0%. In conditions of sufficient moisture, the number of beans with three seeds was increased.
Highlights
The productivity of agricultural crops in the Forest-Steppe of Ukraine depends mainly on the soil moisture conditions, and the components of the agricultural system are assessed primarily in terms of their impact on accumulation, conservation and economical use of moisture [1]
The aim of our researches was to study the productivity of soybeans depending on the soil moisture conditions of the left-bank part of the Forest-Steppe
The indicators of photosynthetic activity of soybean crops were much higher in years with better moisture supply
Summary
The productivity of agricultural crops in the Forest-Steppe of Ukraine depends mainly on the soil moisture conditions, and the components of the agricultural system (species and varietal selection of crops, tillage, fertilizer application system, etc.) are assessed primarily in terms of their impact on accumulation, conservation and economical use of moisture [1]. In order to identify the impact of certain environmental factors on soybean yield, it was found that the sum of effective temperatures in the Forest-Steppe is quite sufficient for growing early and medium-ripe soybean varieties. A more significant factor is the unstable and uneven soil moisture during the growing season [2]. Prolonged drought during the soybean growing season causes significant irreversible changes - the active leaf surface decreases, the leaves turn yellow and dry up. Reducing the area of the photosynthetic apparatus reduces the synthesis of organic matter [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
