Abstract
In conservation agricultural practices, adoption of herbicide has increased for crop protection but increased herbicide uses for soil health are being questioned. Two experiments were conducted to examine the effect of herbicide on net nitrogen mineralization rates in situ under field conditions. Both experiments were conducted at different treatments of post and pre emergence herbicides in the research farm of Bangladesh Agricultural University under Old Brahmaputra Floodplain (AEZ 9). Experiment-1 comprised of three post emergence herbicides and one control treatment [T1-Control, T2-2,4-D Amine, T3-Carfentrazzone-ethyl+isoproturon (Affinity), T4- Carfentrazzone-ethyl (Hammer)]. Composite soil sampling for post emergence herbicides was done at day 21 (days after planting, DAP) which was the day of herbicide and fertilizer application, day 22, 23, 24 and 25 (DAP) after herbicide application. Experiment-2 comprised of one most popular pre-emergence herbicides Pendimethalin (Panida) with manual weeded control treatment. Composite soil sampling for pre emergence herbicides was done at day 3 (DAP) which was the day of herbicide and fertilizer application; day 4, 5, 6 and 7 (DAP) after herbicide application. Both experimental designs were Randomized Complete Block Design (RCBD) with four replications. Herbicides were tested at their label rate compared with manual weeded control treatment. Tested post-emergence herbicides had no significant effect on N mineralization. The numerically higher concentration of NH4+-N and NO3--N was found in treatment T4 (Carfentrazzone-ethyl). Tested pre- and post-emergence herbicides had no significant effect on soil NH4+ and NO3--N content. Similarly, pre-emergence herbicides Pendimethalin (Panida) had no significant effect on NO3--N production. The study revealed that commonly used herbicides have no short term inhibitory effect on nitrogen mineralization and nitrifying microorganism. The increase in nitrification process is an indication of increasing nitrifying microorganism and positive effect to the soil microbiota. Although tested herbicide did not differ significantly with respect to wheat grain, yet the higher grain yield was produced by Carfentrazzone-ethyl+isoproturon (Affinity).
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Claims 8
Claim · model-written summary
Post-emergence herbicides had no significant effect on N mineralization in the wheat field.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- post-emergence herbicidese0
- Outcome
- N mineralizatione0
- Direction
- no significant effecte0
- Setting
- field conditionse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of herbicides on in-situ net mineralization of nitrogen in wheat field”
e0“Tested post-emergence herbicides had no significant effect on N mineralization”
e7“to examine the effect of herbicide on net nitrogen mineralization rates in situ under field conditions”
Claim · model-written summary
Carfentrazone-ethyl was associated with numerically higher NH4+-N and NO3--N concentrations.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Carfentrazzone-ethyle1
- Outcome
- concentration of NH4+-N and NO3--Ne1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of herbicides on in-situ net mineralization of nitrogen in wheat field”
e1“The numerically higher concentration of NH4+-N and NO3--N was found in treatment T4 (Carfentrazzone-ethyl)”
Claim · model-written summary
Pre- and post-emergence herbicides had no significant effect on soil NH4+ and NO3--N content.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- pre- and post-emergence herbicidese2
- Outcome
- soil NH4+ and NO3--N contente2
- Direction
- no significant effecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of herbicides on in-situ net mineralization of nitrogen in wheat field”
e2“Tested pre- and post-emergence herbicides had no significant effect on soil NH4+ and NO3--N content”
Claim · model-written summary
Pre-emergence Pendimethalin (Panida) had no significant effect on NO3--N production.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- pre-emergence herbicides Pendimethalin (Panida)e3
- Outcome
- NO3--N productione3
- Direction
- no significant effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of herbicides on in-situ net mineralization of nitrogen in wheat field”
e3“pre-emergence herbicides Pendimethalin (Panida) had no significant effect on NO3--N production”
Claim · model-written summary
Commonly used herbicides have no short-term inhibitory effect on nitrogen mineralization and nitrifying microorganisms.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- commonly used herbicidese4
- Outcome
- nitrogen mineralization and nitrifying microorganisme4
- Direction
- no short term inhibitory effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of herbicides on in-situ net mineralization of nitrogen in wheat field”
e4“The study revealed that commonly used herbicides have no short term inhibitory effect on nitrogen mineralization and nitrifying microorganism”
Claim · model-written summary
The nitrification process increased, indicating more nitrifying microorganisms and a positive effect on soil microbiota.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- nitrification processe5
- Direction
- increasee5
- Qualifier
- indication of increasing nitrifying microorganisme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of herbicides on in-situ net mineralization of nitrogen in wheat field”
e5“The increase in nitrification process is an indication of increasing nitrifying microorganism and positive effect to the soil microbiota”
Claim · model-written summary
Tested herbicides did not differ significantly in wheat grain.
- Taxon
- wheatTriticum aestivume6
- Treatment
- tested herbicidee6
- Outcome
- wheat graine6
- Direction
- did not differ significantlye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Although tested herbicide did not differ significantly with respect to wheat grain, yet the higher grain yield was produced by Carfentrazzone-ethyl+isoproturon (Affinity)”
Claim · model-written summary
Carfentrazone-ethyl+isoproturon (Affinity) produced the higher wheat grain yield.
- Taxon
- wheatTriticum aestivume6
- Treatment
- Carfentrazzone-ethyl+isoproturon (Affinity)e6
- Outcome
- grain yielde6
- Direction
- highere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Although tested herbicide did not differ significantly with respect to wheat grain, yet the higher grain yield was produced by Carfentrazzone-ethyl+isoproturon (Affinity)”
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