Abstract
Sorghum (Sorghum bicolor L. (Moenh) is a technical, food, and fodder crop and can be used for various purposes, given its value, the acreage should be substantially expanded in Ukraine, and the elements of cultivation technology should be thoroughly examined. The purpose of the study was to determine the effect of the growth regulator on the photosynthetic productivity of sorghum in the conditions of the Right-Bank Forest-Steppe of Ukraine. The following methods were used in the study: field, measuring and weighing, mathematical, and statistical. The study was conducted in conditions of unstable moisture in the Right-Bank Forest-Steppe of Ukraine in 2016-2019. Based on the results of the study, it was determined that the use of a plant growth regulator affected photosynthetic productivity, namely, the leaf surface area, photosynthetic potential and net photosynthesis productivity. The indicators for the content of chlorophylls changed. Thus, the assimilation area of leaves reached a maximum with seed treatment and spraying of crops and amounted to 8.56 thousand m2 /ha during the tillering period, during the period of stem elongation – 29.6 thousand m2 /ha, during flowering and full ripeness – 40.32 and 4.97 thousand m2 /ha. Net photosynthetic productivity in the control was the lowest – 4.67 g/m2 , the use of a growth regulator on seeds and crops contributed to its increase by 0.27 and 0.79 g/m2 . With the treatment of seeds and crops, the net photosynthetic productivity was the highest and amounted to 6.12 g/m2 . The sum of chlorophylls a+b had the highest rates during the tasselling period and, depending on the experiment options, ranged from 4.36 to 5.35. The yield of grain and biomass also varied depending on the use of the preparation, and was the highest in the version with seed treatment and spraying of crops (7.1 and 35.9 t/ha). The close relationship between photosynthetic productivity and the yield of sorghum is also determined. The study can contribute to the widespread use of growth regulators in sorghum crops, ensure the full development of plants, and increase grain yields and biomass
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Claims 14
Claim · model-written summary
Growth regulator use affected leaf area, photosynthetic potential and net photosynthetic productivity.
- Treatment
- plant growth regulatore0
- Outcome
- leaf surface area, photosynthetic potential and net photosynthesis productivitye0
- Setting
- Right-Bank Forest-Steppe of Ukrainee1
SorghumNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of a plant growth regulator affected photosynthetic productivity, namely, the leaf surface area, photosynthetic potential and net photosynthesis productivity”
e1“sorghum in the conditions of the Right-Bank Forest-Steppe of Ukraine”
t0“sorghum”
Claim · model-written summary
Chlorophyll content changed across treatments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The indicators for the content of chlorophylls changed”
t0“sorghum”
Claim · model-written summary
Leaf assimilation area at tillering peaked at 8.56 thousand m2 /ha under seed treatment and crop spraying.
- Organ / stage
- tillering periode0
- Treatment
- seed treatment and spraying of cropse0
- Outcome
- assimilation area of leavese0
- Direction
- maximume0
- Value
- 8.56 thousand m2 /hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the assimilation area of leaves reached a maximum with seed treatment and spraying of crops and amounted to 8.56 thousand m2 /ha during the tillering period”
t0“sorghum”
Claim · model-written summary
Leaf assimilation area at stem elongation reached 29.6 thousand m2 /ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during the period of stem elongation – 29.6 thousand m2 /ha”
e1“the assimilation area of leaves reached a maximum”
t0“sorghum”
Claim · model-written summary
Leaf assimilation area at flowering reached 40.32 thousand m2 /ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during flowering and full ripeness – 40.32 and 4.97 thousand m2 /ha”
e1“the assimilation area of leaves reached a maximum”
t0“sorghum”
Claim · model-written summary
Leaf assimilation area at full ripeness reached 4.97 thousand m2 /ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during flowering and full ripeness – 40.32 and 4.97 thousand m2 /ha”
e1“the assimilation area of leaves reached a maximum”
t0“sorghum”
Claim · model-written summary
Control net photosynthetic productivity was lowest at 4.67 g/m2.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net photosynthetic productivity in the control was the lowest – 4.67 g/m2”
t0“sorghum”
Claim · model-written summary
Growth regulator on seeds increased net photosynthetic productivity by 0.27 g/m2.
- Treatment
- growth regulator on seedse0
- Outcome
- Net photosynthetic productivitye1
- Direction
- increasee0
- Value
- 0.27e0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of a growth regulator on seeds and crops contributed to its increase by 0.27 and 0.79 g/m2”
e1“Net photosynthetic productivity in the control was the lowest”
t0“sorghum”
Claim · model-written summary
Growth regulator on crops increased net photosynthetic productivity by 0.79 g/m2.
- Treatment
- growth regulator on seeds and cropse0
- Outcome
- Net photosynthetic productivitye1
- Direction
- increasee0
- Value
- 0.79 g/m2e0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of a growth regulator on seeds and crops contributed to its increase by 0.27 and 0.79 g/m2”
e1“Net photosynthetic productivity in the control was the lowest”
t0“sorghum”
Claim · model-written summary
Combined seed and crop treatment produced the highest net photosynthetic productivity, 6.12 g/m2.
- Treatment
- treatment of seeds and cropse0
- Outcome
- net photosynthetic productivitye0
- Direction
- higheste0
- Value
- 6.12 g/m2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the treatment of seeds and crops, the net photosynthetic productivity was the highest and amounted to 6.12 g/m2”
t0“sorghum”
Claim · model-written summary
Total chlorophyll a+b was highest during tasselling, ranging from 4.36 to 5.35.
- Organ / stage
- tasselling periode0
- Outcome
- sum of chlorophylls a+be0
- Direction
- higheste0
- Value
- 4.36 to 5.35e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sum of chlorophylls a+b had the highest rates during the tasselling period and, depending on the experiment options, ranged from 4.36 to 5.35”
t0“sorghum”
Claim · model-written summary
Grain yield was highest under seed treatment and crop spraying, at 7.1 t/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of grain and biomass also varied depending on the use of the preparation, and was the highest in the version with seed treatment and spraying of crops (7.1 and 35.9 t/ha)”
t0“sorghum”
Claim · model-written summary
Biomass yield was highest under seed treatment and crop spraying, at 35.9 t/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of grain and biomass also varied depending on the use of the preparation, and was the highest in the version with seed treatment and spraying of crops (7.1 and 35.9 t/ha)”
t0“sorghum”
Claim · model-written summary
Photosynthetic productivity was closely related to sorghum yield.
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The close relationship between photosynthetic productivity and the yield of sorghum is also determined”
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