Abstract
This study evaluates the effect of different rates of mineral nitrogen fertilizer on ammonifier counts, protease activity and some chemical characteristics of vertisol (pH, phosphorus and potassium levels) under field pea cultivation. Increasing rates of mineral nitrogen fertilizers (20, 40 and 60 kg ha A1 ) combined with standard rates of phosphorus and potassium (75 and 60 kg ha A1 , respectively) were incorporated prior to seeding, with their effect on the above biological parameters being monitored during two stages of field pea development (pod formation and waxAripe stage), and their effect on soil chemical characteristics after field pea harvest. The results show that the use of these fertilizers led to a significant decrease in ammonifier counts in the first stage of the study (particularly the 60 kg ha A1 rate), and a nonAsignificant effect in the waxArip e stage. Conversely, protease activity was significantly increased by lower fertilization rates (20 and 40 kg ha A1 ) during the first period of the study, and by all three nitrogen fertilization rates at the milkAwax ripeness stage. The use of these fertilizers did not affect soil pH, unlike readily available phosphorus and potassium levels.
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Claims 6
Claim · model-written summary
Fertilizers significantly reduced ammonifier counts during pod formation, particularly at the highest nitrogen rate.
- Taxon
- FIELD PEAt0
- Treatment
- these fertilizerse0
- Outcome
- ammonifier countse0
- Direction
- decreasee0
- Qualifier
- first stage of the study (particularly the 60 kg ha A1 rate)e0
Not reportedComparator
Verbatim
e0“The results show that the use of these fertilizers led to a significant decrease in ammonifier counts in the first stage of the study (particularly the 60 kg ha A1 rate)”
t0“FIELD PEA”
Claim · model-written summary
Fertilizers had a nonsignificant effect on ammonifier counts at the wax-ripe stage.
Not reportedComparatorDirection
Verbatim
e0“The results show that the use of these fertilizers led to a significant decrease in ammonifier counts in the first stage of the study (particularly the 60 kg ha A1 rate), and a nonAsignificant effect in the waxArip e stage”
t0“FIELD PEA”
Claim · model-written summary
Lower fertilizer rates significantly increased protease activity in the first period.
- Taxon
- FIELD PEAt0
- Treatment
- lower fertilization rates (20 and 40 kg ha A1 )e0
- Outcome
- protease activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“protease activity was significantly increased by lower fertilization rates (20 and 40 kg ha A1 ) during the first period of the study”
t0“FIELD PEA”
Claim · model-written summary
All three nitrogen rates significantly increased protease activity at milk-wax ripeness.
- Taxon
- FIELD PEAt0
- Treatment
- all three nitrogen fertilization ratese0
- Outcome
- protease activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“protease activity was significantly increased by lower fertilization rates (20 and 40 kg ha A1 ) during the first period of the study, and by all three nitrogen fertilization rates at the milkAwax ripeness stage”
t0“FIELD PEA”
Claim · model-written summary
Fertilizers did not change soil pH.
Not reportedComparator
Verbatim
e0“The use of these fertilizers did not affect soil pH, unlike readily available phosphorus and potassium levels”
t0“FIELD PEA”
Claim · model-written summary
Fertilizers affected readily available soil phosphorus and potassium levels.
- Taxon
- FIELD PEAt0
- Treatment
- these fertilizerse0
- Outcome
- readily available phosphorus and potassium levelse0
Not reportedComparatorDirection
Verbatim
e0“The use of these fertilizers did not affect soil pH, unlike readily available phosphorus and potassium levels”
t0“FIELD PEA”
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