Abstract
An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during November 2011 to May 2012 to determine the effect of pre-emergence herbicide Pretilachlor @ 75%, 100%, 125%, 150%, 175% and 200% of the recommended dose under two water management regime i.e. continuous flooding and field capacity on weed suppression and yield performance of Boro rice cv. BRRIdhan28. One weed free and one control (unweeded) treatment were also imposed for treatment comparison. The experiment was laid down in Split Plot design with three replications. Standard management practices for transplanted rice were followed. Continuous flooding was found to contribute better weed control efficiency than field capacity. At 60 DAT, the highest weed control efficiency of 65.75% was found in the treatment receiving Pretilachlor @ 125% of the recommended dose under continuous flooding and the least (54.76%) was found in the treatment receiving 75% of the recommended dose under field capacity. Continuous flooding contributed to more tillers thanfield capacity, and herbicide up to 125% of the recommended dose enhanced tillering in rice. At 75DAT the highest number of tillers (17.53 hill-1) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management (W1T3), while the lowest (11.10 hill-1) was recorded in W2T6 treatment receiving Pretilachlor @ 200% of the recommended dose under field capacity. The highest tiller mortality (27.90%) was observed in W1T3 treatment, whereas the least (8.06%) was observed in W2T5 treatment receiving the same herbicide @175% of the recommended dose under field capacity. Application of Pretilachlor at recommended dose under continuous flooding contributed to the highest crop dry matter production (1144.60g m-2) thus leading to the highest grain yield of 6.31 t ha-1 being followed by the treatment receiving Pretilachlor @ 125% of the recommended dose under same water management yielding 5.95 t ha-1 along with the highest harvest index of 0.58. Results revealed that Pretilachlor at recommended dose might be considered as viable option for weed management in transplanted Boro rice cultivation for effective weed management and satisfactory grain yield provided that appropriate water management is adopted. Journal of Science Foundation 2014;12(2):39-46DOI: http://dx.doi.org/10.3329/jsf.v12i2.27737
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Claims 14
Claim · model-written summary
Rice trial reported weed control efficiency for continuous flooding.
Not reportedTreatment
Verbatim
t0“Boro Rice”
e0“Continuous flooding was found to contribute better weed control efficiency than field capacity”
Claim · model-written summary
Rice trial reported weed control efficiency for Pretilachlor @ 125% of the recommended dose.
- Taxon
- Boro Ricet0
- Treatment
- Pretilachlor @ 125% of the recommended dosee0
- Outcome
- weed control efficiencye0
- Direction
- higheste0
- Value
- 65.75%e0
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“the highest weed control efficiency of 65.75% was found in the treatment receiving Pretilachlor @ 125% of the recommended dose under continuous flooding”
Claim · model-written summary
Rice trial reported weed control efficiency for 75% of the recommended dose.
- Taxon
- Boro Ricet0
- Treatment
- 75% of the recommended dosee0
- Outcome
- weed control efficiencye1
- Direction
- leaste0
- Value
- 54.76%e0
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“the least (54.76%) was found in the treatment receiving 75% of the recommended dose under field capacity”
e1“Continuous flooding was found to contribute better weed control efficiency than field capacity”
Claim · model-written summary
Rice trial reported tillers for Continuous flooding.
Verbatim
t0“Boro Rice”
e0“Continuous flooding contributed to more tillers thanfield capacity”
Claim · model-written summary
Rice trial reported tillering for herbicide up to 125% of the recommended dose.
- Taxon
- Boro Ricet0
- Treatment
- herbicide up to 125% of the recommended dosee0
- Outcome
- tilleringe0
- Direction
- enhancede0
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“herbicide up to 125% of the recommended dose enhanced tillering in rice”
Claim · model-written summary
Rice trial reported number of tillers for Pretilachlor @ 125% of the recommended dose.
- Taxon
- Boro Ricet0
- Treatment
- Pretilachlor @ 125% of the recommended dosee0
- Outcome
- number of tillerse0
- Direction
- higheste0
- Value
- 17.53 hill-1e0
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“the highest number of tillers (17.53 hill-1) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management”
Claim · model-written summary
Rice trial reported number of tillers for Pretilachlor @ 200% of the recommended dose.
- Taxon
- Boro Ricet0
- Treatment
- Pretilachlor @ 200% of the recommended dosee0
- Outcome
- number of tillerse1
- Direction
- loweste0
- Value
- 11.10 hill-1e0
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“the lowest (11.10 hill-1) was recorded in W2T6 treatment receiving Pretilachlor @ 200% of the recommended dose under field capacity”
e1“the highest number of tillers (17.53 hill-1) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management”
Claim · model-written summary
Rice trial reported tiller mortality for W1T3 treatment.
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“The highest tiller mortality (27.90%) was observed in W1T3 treatment”
Claim · model-written summary
Rice trial reported tiller mortality for herbicide @175% of the recommended dose.
- Taxon
- Boro Ricet0
- Treatment
- herbicide @175% of the recommended dosee0
- Outcome
- tiller mortalitye1
- Direction
- leaste0
- Value
- 8.06%e0
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“the least (8.06%) was observed in W2T5 treatment receiving the same herbicide @175% of the recommended dose under field capacity”
e1“The highest tiller mortality (27.90%) was observed in W1T3 treatment”
Claim · model-written summary
Rice trial reported crop dry matter production for Pretilachlor at recommended dose under continuous flooding.
- Taxon
- Boro Ricet0
- Treatment
- Pretilachlor at recommended dose under continuous floodinge0
- Outcome
- crop dry matter productione0
- Direction
- higheste0
- Value
- 1144.60g m-2e0
Not reportedComparator
Verbatim
t0“Boro Rice”
e0“Application of Pretilachlor at recommended dose under continuous flooding contributed to the highest crop dry matter production (1144.60g m-2)”
Claim · model-written summary
Rice trial reported grain yield for Pretilachlor at recommended dose under continuous flooding.
Not reportedTreatmentComparator
Verbatim
t0“Boro Rice”
e0“the highest grain yield of 6.31 t ha-1”
Claim · model-written summary
Rice trial reported yielding for Pretilachlor @ 125% of the recommended dose.
- Taxon
- Boro Ricet0
- Treatment
- Pretilachlor @ 125% of the recommended dosee0
- Outcome
- yieldinge0
- Value
- 5.95 t ha-1e0
Not reportedComparatorDirection
Verbatim
t0“Boro Rice”
e0“Pretilachlor @ 125% of the recommended dose under same water management yielding 5.95 t ha-1”
Claim · model-written summary
Rice trial reported harvest index for Pretilachlor @ 125% of the recommended dose.
Not reportedTreatmentComparator
Verbatim
t0“Boro Rice”
e0“the highest harvest index of 0.58”
Claim · model-written summary
The authors recommend Pretilachlor at the recommended dose with appropriate water management for Boro rice.
Verbatim
e0“Pretilachlor at recommended dose might be considered as viable option for weed management in transplanted Boro rice cultivation for effective weed management and satisfactory grain yield provided that appropriate water management is adopted”
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See all 286 papers →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.