Paper · 2025 · Agriculture Association of Textile Chemical and Critical Reviews

Impact of Herbicide Combinations on Soil Microflora, Enzyme Activity, Nutrient Dynamics, and Weed Index in Dry Direct-Seeded Rice

P. Nagarjun; G. N. Dhanapal; M. T. Sanjay; et al.

12
claims
27
verbatim quotes
0
citations
3
research areas
✓
Open access

Abstract

Dry direct-seeded rice (DSR) is gaining prominence as a sustainable alternative to conventional transplanting due to labor shortages and water scarcity. However, weed infestation remains a critical challenge in this method, significantly reducing yields. This study evaluates the impact of various herbicide combinations on soil microflora, enzyme activity, nutrient uptake, and weed control in DSR. A field experiment was conducted at the Main Research Station, Hebbal, University of Agricultural Sciences, Bengaluru, India, using a randomized block design with twelve treatments, including chemical and mechanical weed management methods. The results showed that herbicide combinations such as bensulfuron-methyl + pretilachlor followed by bispyribac sodium or triafamone + ethoxysulfuron effectively controlled weeds with minimal impact on soil microbial activity and soil enzymatic functions. These treatments enhanced nutrient uptake by the crop while reducing nutrient loss through weeds, leading to higher grain and straw yields. Hand weeding at 20, 40, and 60 days after sowing recorded the highest grain (5.50 t ha⁻¹) and straw yield (7.22 t ha⁻¹), which was statistically on par with bensulfuron- methyl + pretilachlor followed by bispyribac sodium (5.39 and 7.16 t ha⁻¹) and bensulfuron- methyl + pretilachlor followed by triafamone + ethoxysulfuron (5.29 and 7.03 t ha⁻¹). The lowest yields (grain: 1.40 t ha⁻¹, straw: 2.32 t ha⁻¹) were recorded in the weedy check.

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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 12

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bensulfuron-methyl plus pretilachlor followed by bispyribac sodium controlled weeds effectively.

Treatment
bensulfuron-methyl + pretilachlor followed by bispyribac sodiume0
Interactor
weedse0weed
Outcome
weedse0
Direction
controllede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“herbicide combinations such as bensulfuron-methyl + pretilachlor followed by bispyribac sodium or triafamone + ethoxysulfuron effectively controlled weeds”

✓ located verbatim in the source · abstract, characters 665–819 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Triafamone plus ethoxysulfuron controlled weeds effectively.

Treatment
triafamone + ethoxysulfurone0
Interactor
weedse0weed
Outcome
weedse0
Direction
controllede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“triafamone + ethoxysulfuron effectively controlled weeds”

✓ located verbatim in the source · abstract, characters 763–819 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

These herbicide treatments had minimal impact on soil microbial activity and enzymatic functions.

Treatment
These treatmentse0
Outcome
soil microbial activity and soil enzymatic functionse1
Direction
minimal impacte1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“These treatments enhanced nutrient uptake by the crop while reducing nutrient loss through weeds”

✓ located verbatim in the source · abstract, characters 897–993 · show in text ↑
e1

“minimal impact on soil microbial activity and soil enzymatic functions”

✓ located verbatim in the source · abstract, characters 825–895 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

These treatments enhanced crop nutrient uptake.

Treatment
These treatmentse0
Outcome
nutrient uptake by the crope0
Direction
enhancede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“These treatments enhanced nutrient uptake by the crop”

✓ located verbatim in the source · abstract, characters 897–950 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

These treatments reduced nutrient loss through weeds.

Treatment
These treatmentse0
Interactor
weedse0weed
Outcome
nutrient loss through weedse0
Direction
reducinge0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“These treatments enhanced nutrient uptake by the crop while reducing nutrient loss through weeds”

✓ located verbatim in the source · abstract, characters 897–993 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

These treatments led to higher grain and straw yields.

Treatment
These treatmentse0
Outcome
grain and straw yieldse0
Direction
highere0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“These treatments enhanced nutrient uptake by the crop while reducing nutrient loss through weeds, leading to higher grain and straw yields”

✓ located verbatim in the source · abstract, characters 897–1035 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Hand weeding recorded the highest grain yield of 5.50 t ha⁻¹.

Treatment
Hand weeding at 20, 40, and 60 days after sowinge0
Outcome
graine0
Direction
higheste0
Value
5.50 t ha⁻¹e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“Hand weeding at 20, 40, and 60 days after sowing recorded the highest grain (5.50 t ha⁻¹)”

✓ located verbatim in the source · abstract, characters 1037–1126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Hand weeding recorded straw yield of 7.22 t ha⁻¹.

Treatment
Hand weeding at 20, 40, and 60 days after sowinge0
Outcome
straw yielde0
Direction
higheste0
Value
7.22 t ha⁻¹e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“Hand weeding at 20, 40, and 60 days after sowing recorded the highest grain (5.50 t ha⁻¹) and straw yield (7.22 t ha⁻¹)”

✓ located verbatim in the source · abstract, characters 1037–1156 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Bensulfuron-methyl plus pretilachlor followed by bispyribac sodium gave grain yield of 5.39 t ha⁻¹, statistically on par with hand weeding.

Treatment
bensulfuron- methyl + pretilachlor followed by bispyribac sodiume0
Outcome
graine1
Direction
on pare0
Value
5.39e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“statistically on par with bensulfuron- methyl + pretilachlor followed by bispyribac sodium (5.39 and 7.16 t ha⁻¹)”

✓ located verbatim in the source · abstract, characters 1168–1281 · show in text ↑
e1

“the highest grain (5.50 t ha⁻¹) and straw yield (7.22 t ha⁻¹)”

✓ located verbatim in the source · abstract, characters 1095–1156 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Bensulfuron-methyl plus pretilachlor followed by bispyribac sodium gave straw yield of 7.16 t ha⁻¹, statistically on par with hand weeding.

Treatment
bensulfuron- methyl + pretilachlor followed by bispyribac sodiume0
Outcome
straw yielde1
Direction
on pare0
Value
7.16 t ha⁻¹e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“statistically on par with bensulfuron- methyl + pretilachlor followed by bispyribac sodium (5.39 and 7.16 t ha⁻¹)”

✓ located verbatim in the source · abstract, characters 1168–1281 · show in text ↑
e1

“the highest grain (5.50 t ha⁻¹) and straw yield (7.22 t ha⁻¹)”

✓ located verbatim in the source · abstract, characters 1095–1156 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Weedy check gave the lowest grain yield of 1.40 t ha⁻¹.

Outcome
graine0
Direction
loweste0
Value
1.40 t ha⁻¹e0
Comparator
weedy checke0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“The lowest yields (grain: 1.40 t ha⁻¹, straw: 2.32 t ha⁻¹) were recorded in the weedy check”

✓ located verbatim in the source · abstract, characters 1385–1476 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Weedy check gave the lowest straw yield of 2.32 t ha⁻¹.

Outcome
strawe0
Direction
loweste0
Value
2.32 t ha⁻¹e0
Comparator
weedy checke0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Dry Direct-Seeded Rice”

✓ located verbatim in the source · title, characters 107–129 · show in text ↑
e0

“The lowest yields (grain: 1.40 t ha⁻¹, straw: 2.32 t ha⁻¹) were recorded in the weedy check”

✓ located verbatim in the source · abstract, characters 1385–1476 · show in text ↑

Pretilachlor · yield · Oryza sativa (rice)Results differ

141 papers: 133 positive, 8 negative or no effect

7 papers in the same direction as this paper · 133 in the opposite direction

  1. positive
  2. positive
  3. positive

137 papers more in this group

See all 141 papers →

Pretilachlor · weed · Oryza sativa (rice)Results differ

150 papers: 147 positive, 3 negative or no effect

146 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. negative
  3. no effect

146 papers more in this group

See all 150 papers →

bispyribac-sodium · yield · Oryza sativa (rice)Results differ

170 papers: 161 positive, 9 negative or no effect

8 papers in the same direction as this paper · 161 in the opposite direction

  1. positive
  2. positive
  3. positive

166 papers more in this group

See all 170 papers →

Ethoxysulfuron · weed · Oryza sativa (rice)Positive and negative results

38 papers: 36 positive, 2 negative or no effect

35 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. positive

34 papers more in this group

See all 38 papers →

bensulfuron-methyl · yield · Oryza sativa (rice)Positive and negative results

45 papers: 39 positive, 6 negative or no effect

5 papers in the same direction as this paper · 39 in the opposite direction

  1. positive
  2. positive
  3. positive

41 papers more in this group

See all 45 papers →

bensulfuron-methyl · weed · Oryza sativa (rice)Positive and negative results

47 papers: 46 positive, 1 negative or no effect

45 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

43 papers more in this group

See all 47 papers →

bispyribac-sodium · weed · Oryza sativa (rice)Positive and negative results

153 papers: 149 positive, 4 negative or no effect

148 papers in the same direction as this paper · 1 in the opposite direction · 3 reporting no difference from an alternative

  1. negative
  2. no effect
    Total weed population and dry weight under bispyribac-sodium at 25 g/ha were at par with the higher doses.

    Evaluation of bispyribac-sodium in transplanted rice · 2013 · compared with higher doses of bispyribac-sodium at 35 and 50 g/ha

    No difference from an alternative

  3. no effect

149 papers more in this group

See all 153 papers →

triafamone · weed · Oryza sativa (rice)Results agree

18 papers: 18 positive, 0 negative or no effect

17 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

14 papers more in this group

See all 18 papers →

8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.