Abstract
The 15 N-labeled method was used to study the nitrogen balance in flue-cured tobacco field. The results showed that although the production of fluecured tobacco was increased with the addition of the nitrogen fertilizer, the utilization rate of nitrogen fertilizer was decreased gradually. Nitrogen was mainly distributed in the stems and leaves of the flue-cured tobacco, and went up gradually with the increase of nitrogen fertilizer. Generally, with the increase of nitrogen fertilizer, the proportion of fertilizer-N in roots, stems, buds and terminal buds first increased and then decreased, however, it basically showed the increasing trend in leaves. The loss of nitrogen (runoff, seepage and sediment) and wastage nitrogen (other ways) mainly came from soil-N with the increase of nitrogen fertilizer rate. The increase of nitrogen fertilizer rate aggravated the loss of nitrogen, increased the surplus of soil nitrogen, and reduced the recycling rate of nitrogen. Considering the yield, quality and nitrogen utilization rate comprehensively, T8 (120 kg/ hm 2 ) showed the best nitrogen fertilizer rate in this experiment. 15 N fertilizer, nitrogen fertilizer rate, nitrogen balance.
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Claims 11
Claim · model-written summary
Nitrogen fertilizer increased tobacco production.
- Taxon
- fluecured tobaccoe0
- Treatment
- addition of the nitrogen fertilizere0
- Outcome
- productione0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“production of fluecured tobacco was increased with the addition of the nitrogen fertilizer”
Claim · model-written summary
Nitrogen fertilizer utilization declined as fertilizer increased.
Not reportedTaxonTreatment
Verbatim
e0“utilization rate of nitrogen fertilizer was decreased gradually”
Claim · model-written summary
Nitrogen was distributed mainly in tobacco stems and leaves.
Verbatim
e0“Nitrogen was mainly distributed in the stems and leaves of the flue-cured tobacco”
Claim · model-written summary
Nitrogen in stems and leaves increased with fertilizer rate.
Verbatim
e0“Nitrogen was mainly distributed in the stems and leaves of the flue-cured tobacco, and went up gradually with the increase of nitrogen fertilizer”
Claim · model-written summary
The fertilizer nitrogen proportion in roots, stems, buds and terminal buds first increased then decreased with fertilizer rate.
- Organ / stage
- roots, stems, buds and terminal budse0
- Treatment
- increase of nitrogen fertilizere0
- Outcome
- proportion of fertilizer-Ne0
- Direction
- first increased and then decreasede0
Not reportedTaxon
Verbatim
e0“with the increase of nitrogen fertilizer, the proportion of fertilizer-N in roots, stems, buds and terminal buds first increased and then decreased”
Claim · model-written summary
The fertilizer nitrogen proportion in leaves generally rose with fertilizer rate.
Not reportedTaxon
Verbatim
e0“it basically showed the increasing trend in leaves”
e1“Generally, with the increase of nitrogen fertilizer”
Claim · model-written summary
Nitrogen loss and wastage mainly originated from soil nitrogen as fertilizer rate increased.
Not reportedTaxon
Verbatim
e0“The loss of nitrogen (runoff, seepage and sediment) and wastage nitrogen (other ways) mainly came from soil-N with the increase of nitrogen fertilizer rate”
Claim · model-written summary
Increasing nitrogen fertilizer rate aggravated nitrogen loss.
Not reportedTaxon
Verbatim
e0“The increase of nitrogen fertilizer rate aggravated the loss of nitrogen”
Claim · model-written summary
Increasing nitrogen fertilizer rate raised the soil nitrogen surplus.
- Treatment
- increase of nitrogen fertilizer ratee1
- Outcome
- surplus of soil nitrogene0
- Direction
- increasede0
Not reportedTaxon
Verbatim
e0“increased the surplus of soil nitrogen”
e1“The increase of nitrogen fertilizer rate”
Claim · model-written summary
Increasing nitrogen fertilizer rate reduced nitrogen recycling.
- Treatment
- increase of nitrogen fertilizer ratee1
- Outcome
- recycling rate of nitrogene0
- Direction
- reducede0
Not reportedTaxon
Verbatim
e0“reduced the recycling rate of nitrogen”
e1“The increase of nitrogen fertilizer rate”
Claim · model-written summary
The authors identified T8 at 120 kg/hm2 as the best nitrogen fertilizer rate when yield, quality and nitrogen utilization were considered.
Not reportedTaxon
Verbatim
e0“Considering the yield, quality and nitrogen utilization rate comprehensively, T8 (120 kg/ hm 2 ) showed the best nitrogen fertilizer rate in this experiment.”