Abstract
【Objective】The effects of potassium(K) fertilizing on yield of summer sweet potato variety Longshu24 were studied to provide technical support for K fertilizing application. 【Method】Using randomized block design, traits,yields,dry matter accumulation of sweet potato and K fertilizing use efficiency were analyzed under the K fertilizing application dose of 0,75,150,225,300 and 375 kg/ha,respectively. 【Result】Stem diameter of summer sweet potato variety Longshu24 showed no differences in different treatments. The average stem weight had significant differences among the treatments. It was increased under the low K fertilizing and restrained under the high K fertilizing. Applying K fertilizing could increase the numbers of base branches. The root dry rate had significant differences among treatments. The root fresh and dry yield of no fertilizing was the lowest among treatments, while its root dry rate was the highest and significantly differed from other treatments(P0.05, similarly hereinafter). The low level of K fertilizing increased the portion in large- and medium-sized sweet potato,but the high level of K fertilizing decreased the portion in large- and medium-sized sweet potato. The K fertilizing could improve the velocity peak,the dry matter accumulation of storage root and the dry matter accumulation of single plant during transplanting 90-120 days. It reduced the value of T/R. The optimal amount of K fertilizing was 250 kg/ha for producing high yield of fresh tuber,212.5 kg/ha for producing high yield of dried sweet potato and starch,and 162.5 kg/ha for producing high yield of total plant. The K fertilizing use efficiency showed the fertilizing law of diminishing returns. 【Conclusion】Under the conditions of available K(120 mg/kg) in soil moisture, for the maximum dry tuber(15876.1 kg/ha) yield, fresh yield(57190.5 kg/ha), and starch yield(10174.2 kg/ha), N, P2O5and K2O application was 90,90 and 300 kg/ha, respectively.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 19
Claim · model-written summary
Stem diameter did not differ among treatments.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase0 - Material
- Longshu24e0
- Treatment
- different treatmentse0
- Outcome
- Stem diametere0
- Direction
- no differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“Stem diameter of summer sweet potato variety Longshu24 showed no differences in different treatments.”
Claim · model-written summary
Average stem weight differed significantly among treatments.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- treatmentse0
- Outcome
- average stem weighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average stem weight had significant differences among the treatments.”
t0“sweet potato”
Claim · model-written summary
Low potassium fertilization increased stem weight.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- low K fertilizinge0
- Outcome
- average stem weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average stem weight had significant differences among the treatments. It was increased under the low K fertilizing”
t0“sweet potato”
Claim · model-written summary
High potassium fertilization restrained stem weight.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- high K fertilizinge0
- Outcome
- average stem weighte0
- Direction
- restrainede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average stem weight had significant differences among the treatments. It was increased under the low K fertilizing and restrained under the high K fertilizing.”
t0“sweet potato”
Claim · model-written summary
Potassium fertilization increased base branch number.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- K fertilizinge0
- Outcome
- numbers of base branchese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying K fertilizing could increase the numbers of base branches.”
t0“sweet potato”
Claim · model-written summary
Root dry rate differed significantly among treatments.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- treatmentse0
- Outcome
- root dry ratee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root dry rate had significant differences among treatments.”
t0“sweet potato”
Claim · model-written summary
Without fertilization, root fresh and dry yield were lowest.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- no fertilizinge0
- Outcome
- root fresh and dry yielde0
- Direction
- loweste0
- Comparator
- treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root fresh and dry yield of no fertilizing was the lowest among treatments”
t0“sweet potato”
Claim · model-written summary
Without fertilization, root dry rate was highest and significantly different.
- Taxon
- sweet potatoIpomoea batatast0
- Outcome
- root dry ratee0
- Direction
- higheste0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while its root dry rate was the highest and significantly differed from other treatments”
t0“sweet potato”
Claim · model-written summary
Low potassium increased the share of large and medium sweet potatoes.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- low level of K fertilizinge0
- Outcome
- portion in large- and medium-sized sweet potatoe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The low level of K fertilizing increased the portion in large- and medium-sized sweet potato”
Claim · model-written summary
High potassium decreased the share of large and medium sweet potatoes.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- high level of K fertilizinge0
- Outcome
- portion in large- and medium-sized sweet potatoe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high level of K fertilizing decreased the portion in large- and medium-sized sweet potato”
Claim · model-written summary
Potassium fertilization improved the velocity peak and dry matter accumulation during days 90 to 120.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- K fertilizinge0
- Outcome
- velocity peak,the dry matter accumulation of storage root and the dry matter accumulation of single plante0
- Direction
- improvee0
- Qualifier
- 90-120 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The K fertilizing could improve the velocity peak,the dry matter accumulation of storage root and the dry matter accumulation of single plant during transplanting 90-120 days.”
t0“sweet potato”
Claim · model-written summary
Potassium fertilization reduced T/R.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- potassium fertilizingt0
- Outcome
- value of T/Re0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It reduced the value of T/R.”
t0“potassium fertilizing on yield of summer sweet potato”
Claim · model-written summary
Optimal potassium for fresh tuber yield was 250 kg/ha.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- K fertilizinge0
- Outcome
- high yield of fresh tubere0
- Value
- 250 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal amount of K fertilizing was 250 kg/ha for producing high yield of fresh tuber”
t0“sweet potato”
Claim · model-written summary
Optimal potassium for dried sweet potato and starch yield was 212.5 kg/ha.
- Taxon
- sweet potatoIpomoea batatase0
- Outcome
- high yield of dried sweet potato and starche0
- Value
- 212.5 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“212.5 kg/ha for producing high yield of dried sweet potato and starch”
Claim · model-written summary
Optimal potassium for total plant yield was 162.5 kg/ha.
- Taxon
- sweet potatoIpomoea batatast0
- Outcome
- high yield of total plante0
- Value
- 162.5 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“162.5 kg/ha for producing high yield of total plant”
t0“sweet potato”
Claim · model-written summary
Potassium fertilizer use efficiency showed diminishing returns.
- Taxon
- sweet potatoIpomoea batatast0
- Outcome
- K fertilizing use efficiencye0
- Direction
- diminishing returnse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The K fertilizing use efficiency showed the fertilizing law of diminishing returns.”
t0“sweet potato”
Claim · model-written summary
Maximum dry tuber yield was 15876.1 kg/ha under stated N, P2O5 and K2O application.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- N, P2O5and K2O application was 90,90 and 300 kg/hae0
- Outcome
- dry tubere0
- Direction
- maximume0
- Value
- 15876.1 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for the maximum dry tuber(15876.1 kg/ha) yield, fresh yield(57190.5 kg/ha), and starch yield(10174.2 kg/ha), N, P2O5and K2O application was 90,90 and 300 kg/ha, respectively.”
t0“sweet potato”
Claim · model-written summary
Maximum fresh yield was 57190.5 kg/ha under stated fertilizer application.
- Taxon
- sweet potatoIpomoea batatast0
- Outcome
- fresh yielde0
- Direction
- maximume0
- Value
- 57190.5 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum dry tuber(15876.1 kg/ha) yield, fresh yield(57190.5 kg/ha), and starch yield(10174.2 kg/ha), N, P2O5and K2O application was 90,90 and 300 kg/ha”
t0“sweet potato”
Claim · model-written summary
Maximum starch yield was 10174.2 kg/ha under stated fertilizer application.
- Taxon
- sweet potatoIpomoea batatast0
- Outcome
- starch yielde0
- Direction
- maximume0
- Value
- 10174.2 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum dry tuber(15876.1 kg/ha) yield, fresh yield(57190.5 kg/ha), and starch yield(10174.2 kg/ha), N, P2O5and K2O application was 90,90 and 300 kg/ha”
t0“sweet potato”
The same questions in other papers
fertilization · growth · Ipomoea batatas (sweet potato)Results differ
52 papers in the same direction as this paper · 10 in the opposite direction
- no effect
- no effect
- no effect
59 papers more in this group
See all 63 papers →fertilization · organism · Ipomoea batatas (sweet potato)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
4 papers more in this group
See all 8 papers →potassium · growth · Ipomoea batatas (sweet potato)Positive and negative results
21 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
23 papers more in this group
See all 27 papers →fertilization · yield · Ipomoea batatas (sweet potato)Positive and negative results
125 papers in the same direction as this paper · 18 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- no effect
141 papers more in this group
See all 145 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.