Abstract
Nitrogen fertilizer is an important kinetic energy for potato production. To study the effect of nitrogen(N) fertilizer application and the topdressing ratio on potato growth and yield, different N application levels: N75 (75 kg ha−1), N150 (150 kg ha−1), N225 (225 kg ha−1) and different N fertilizer base/topdressing ratios: T1 (2:8), T2 (5:5), T3 (8:2), and T4 (10:0) were used to find the best N fertilizer operation. The results showed that higher yields can be obtained when 120–180 kg ha−1 N was applied under the base/topdressing ratio of 8:2 in silt loam (sand–silt–clay: 29-50-21). The base N fertilizer dosage largely determined the root morphology, while topdressing fertilizer mainly affected the leaf photosystem, however, rhizosphere topdressing at the early stages of bud emergence did not immediately affect the leaf soluble protein and the sugar content. Topdressing N increased the tuber crude protein and ascorbic acid content to some extent, but had weak effect on the amylose/amylopectin ratio, for the starch content was mainly influenced by total N application. When base N fertilizer was low, it could be compensated by applying fertilizer during flowering, though when the amount of base fertilizer was sufficient, topdressing would cause a decrease in the average single potato weight and an increase in potato sets per plant, thereby reducing the commercial potato rate. Overall, adopting a suitable base/topdressing ratio can promote plant growth and improve tuber quality and yield. However, the relationship between the specific application amount and the ratio under different soil texture conditions needs further study.
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Claims 12
Claim · model-written summary
Potato yield was higher with 120–180 kg ha−1 N and an 8:2 base/topdressing ratio in silt loam.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- 120–180 kg ha−1 Ne0
- Outcome
- yieldse0
- Direction
- highere0
- Value
- 120–180 kg ha−1e0
- Qualifier
- base/topdressing ratio of 8:2e0
- Setting
- silt loame0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that higher yields can be obtained when 120–180 kg ha−1 N was applied under the base/topdressing ratio of 8:2 in silt loam (sand–silt–clay: 29-50-21)”
t0“Potato”
Claim · model-written summary
base N fertilizer dosage affected potato root morphology as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- base N fertilizer dosagee0
- Outcome
- root morphologye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The base N fertilizer dosage largely determined the root morphology”
t0“Potato”
Claim · model-written summary
topdressing fertilizer affected potato leaf photosystem as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- topdressing fertilizere0
- Outcome
- leaf photosysteme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“topdressing fertilizer mainly affected the leaf photosystem”
t0“Potato”
Claim · model-written summary
rhizosphere topdressing affected potato leaf soluble protein as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- rhizosphere topdressinge0
- Outcome
- leaf soluble proteine0
- Direction
- did not immediately affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rhizosphere topdressing at the early stages of bud emergence did not immediately affect the leaf soluble protein and the sugar content”
t0“Potato”
Claim · model-written summary
rhizosphere topdressing affected potato sugar content as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- rhizosphere topdressinge0
- Outcome
- sugar contente0
- Direction
- did not immediately affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rhizosphere topdressing at the early stages of bud emergence did not immediately affect the leaf soluble protein and the sugar content”
t0“Potato”
Claim · model-written summary
Topdressing N affected potato tuber crude protein as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Topdressing Ne0
- Outcome
- tuber crude proteine0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing N increased the tuber crude protein and ascorbic acid content to some extent”
t0“Potato”
Claim · model-written summary
Topdressing N affected potato ascorbic acid content as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Topdressing Ne0
- Outcome
- ascorbic acid contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing N increased the tuber crude protein and ascorbic acid content to some extent”
t0“Potato”
Claim · model-written summary
Topdressing N affected potato amylose/amylopectin ratio as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Topdressing Ne0
- Outcome
- amylose/amylopectin ratioe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing N increased the tuber crude protein and ascorbic acid content to some extent, but had weak effect on the amylose/amylopectin ratio”
t0“Potato”
Claim · model-written summary
total N application affected potato starch content as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- total N applicatione0
- Outcome
- starch contente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the starch content was mainly influenced by total N application”
t0“Potato”
Claim · model-written summary
topdressing affected potato average single potato weight as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- topdressinge0
- Outcome
- average single potato weighte0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“topdressing would cause a decrease in the average single potato weight and an increase in potato sets per plant”
t0“Potato”
Claim · model-written summary
topdressing affected potato potato sets per plant as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- topdressinge0
- Outcome
- potato sets per plante0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“topdressing would cause a decrease in the average single potato weight and an increase in potato sets per plant”
t0“Potato”
Claim · model-written summary
topdressing affected potato commercial potato rate as described.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- topdressinge0
- Outcome
- commercial potato ratee0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“topdressing would cause a decrease in the average single potato weight and an increase in potato sets per plant, thereby reducing the commercial potato rate”
t0“Potato”
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