Abstract
Field research was conducted during rabi season of 2011-2012 at Agricultural College and Research Institute, Killikulam, Tamil Nadu to evolve the labour-saving weed management practice in transplanted rice. The experiment was consisted of 12 treatments laid out in randomized block design with three replications. The treatments comprised of application of pre-emergence herbicides viz., oxadiargyl 80% WP @ 70 g ha-1, butachlor 50% EC @ 1.25 kg ha-1, metsulfuron methyl 10% + chlorimuron ethyl 10% WP @ 4 g ha-1, bensulfuron methyl 0.6% + pretilachlor 6% GR @ 660 g ha-1 on 3 DAT along with post-emergence herbicide 2, 4-D Na salt @ 1.25 kg ha-1 or hand weeding on 35 DAT. In addition, the rotary weeding and hand weeding twice on 15 and 35 DAT and weed free conditions were tested with unweeded check. The results revealed that pre-emergence application of bensulfuron methyl + pretilachlor at 660 g a.i. ha-1 on 3 DAT with one hand weeding on 35 DAT recorded significantly lower weed dry weight (37.80 kg ha-1) and nutrient removal by weeds (1.25 N, 0.13 P2O5 and 0.87 K2O kg ha-1, respectively). This treatment also recorded higher grain and straw yield (6710 and 7717 kg ha-1, respectively) with higher number of productive tillers m-2 (427), dry matter production (14668 kg ha-1) and N, P2O5 and K2O uptake of 93.88, 35.20 and 108.54 kg ha-1, respectively. Further the gross return, net return and B:C ratio were also higher with this treatment.
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Claims 8
Claim · model-written summary
Bensulfuron methyl plus pretilachlor followed by hand weeding gave significantly lower weed dry weight of 37.80 kg ha-1.
- Taxon
- rice
Oryza sativat0 - Treatment
- bensulfuron methyl + pretilachlor at 660 g a.i. ha-1 on 3 DAT with one hand weeding on 35 DATe0
- Interactor
- weede0weed
- Outcome
- weed dry weighte0
- Direction
- lowere0
- Value
- 37.80 kg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pre-emergence application of bensulfuron methyl + pretilachlor at 660 g a.i. ha-1 on 3 DAT with one hand weeding on 35 DAT recorded significantly lower weed dry weight (37.80 kg ha-1)”
t0“rice”
Claim · model-written summary
The same treatment lowered nitrogen removal by weeds to 1.25 kg ha-1.
- Taxon
- riceOryza sativat0
Not reportedTreatmentComparatorOutcomeDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment also recorded higher grain and straw yield (6710 and 7717 kg ha-1, respectively)”
t0“rice”
Claim · model-written summary
The treatment produced higher grain yield of 6710 kg ha-1.
- Taxon
- riceOryza sativat0
- Outcome
- grain and straw yielde0
- Direction
- highere0
- Value
- 6710e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment also recorded higher grain and straw yield (6710 and 7717 kg ha-1, respectively)”
t0“rice”
Claim · model-written summary
The treatment produced higher straw yield of 7717 kg ha-1.
- Taxon
- riceOryza sativat0
- Outcome
- straw yielde0
- Direction
- highere0
- Value
- 7717 kg ha-1e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment also recorded higher grain and straw yield (6710 and 7717 kg ha-1, respectively)”
t0“rice”
Claim · model-written summary
The treatment increased productive tillers to 427 m-2.
- Taxon
- riceOryza sativat0
- Outcome
- number of productive tillers m-2e0
- Direction
- highere0
- Value
- 427e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with higher number of productive tillers m-2 (427)”
t0“rice”
Claim · model-written summary
The treatment increased dry matter production to 14668 kg ha-1.
- Taxon
- riceOryza sativat0
- Outcome
- dry matter productione0
- Direction
- higherinferrede0
- Value
- 14668 kg ha-1e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry matter production (14668 kg ha-1)”
t0“rice”
Claim · model-written summary
The treatment increased nutrient uptake.
- Taxon
- riceOryza sativat0
- Outcome
- N, P2O5 and K2O uptakee0
- Direction
- higherinferrede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N, P2O5 and K2O uptake of 93.88, 35.20 and 108.54 kg ha-1, respectively”
t0“rice”
Claim · model-written summary
Gross return, net return and B:C ratio were higher with the treatment.
- Taxon
- riceOryza sativat0
- Treatment
- this treatmente0
- Outcome
- gross return, net return and B:C ratioe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further the gross return, net return and B:C ratio were also higher with this treatment.”
t0“rice”
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