Abstract
Effects of supplying K2O at 0, 12, 24 and 36 g m-2 soils on distribution of photosynthates (carbohydrates produced by photosynthesis) were studied in plants of Ipomoea batatas Lam (Beijing 553). Storage roots yield, photosynthate distribution, sucrose synthase and insoluble acid invertase activities, as well as abscisic acid content in storage roots were determined. The storage root yield first increased and then decreased as the increase in potassium fertilizer supply, with the highest increase of 36.42% under treatment of 24 g K2Om-2 (K24) which was determined to be the optimal amount of fertilization. Under the K24 treatment, the chlorophyll content and PN of functional leaves were improved in the early growth stage, as was the leaf area index. This treatment also increased the sucrose synthase activity and abscisic acid content of storage roots by 16.47% and 18.27%, respectively, for the whole growth stages, and improved insoluble acid invertase activity by 5.75% in the late growth stage. Larger increases of abscisic acid content appeared in late growth stage. More photosynthates were unloaded to storage roots as a result of the improved sucrose synthase, insoluble acid invertase activities and abscisic acid content which contributed to sink strength. The dry matter distribution rate of storage rootswas significantly higher (69.45%) in plants with K24 treatment. In summary, sweet potatos under K24 treatment not only supplied more photosynthates during the early and middle growth stages but also had higher sink strength of storage roots which lead to higher photosynthate distribution in storage roots mainly in the late growth stage. The optimal amount was K2O 24 g m-2.
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Claims 4
Claim · model-written summary
Storage root yield first increased then decreased with rising potassium supply, peaking at 24 g K2O m-2.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- potassium fertilizer supplye2
- Outcome
- storage root yielde2
- Direction
- first increased and then decreasede2
- Value
- 36.42%e2
- Qualifier
- 24 g K2Om-2 (K24)e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
t0“Effects of potassium on yield, photosynthate distribution, enzymes' activity and ABA content in storage roots of sweet potato (Ipomoea batatas Lam.)”
e2“The storage root yield first increased and then decreased as the increase in potassium fertilizer supply, with the highest increase of 36.42% under treatment of 24 g K2Om-2 (K24)”
Claim · model-written summary
The K24 treatment raised sucrose synthase activity and ABA content of storage roots by 16.47% and 18.27%.
- Taxon
- sweet potatoIpomoea batatast0
- Organ / stage
- storage rootse3
- Treatment
- K24e2
- Compound
- abscisic acide3
- Outcome
- sucrose synthase activitye3
- Direction
- increasede3
- Value
- 16.47%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of potassium on yield, photosynthate distribution, enzymes' activity and ABA content in storage roots of sweet potato (Ipomoea batatas Lam.)”
e2“The storage root yield first increased and then decreased as the increase in potassium fertilizer supply, with the highest increase of 36.42% under treatment of 24 g K2Om-2 (K24)”
e3“This treatment also increased the sucrose synthase activity and abscisic acid content of storage roots by 16.47% and 18.27%, respectively, for the whole growth stages”
Claim · model-written summary
Insoluble acid invertase activity in storage roots increased by 5.75% under K24 in the late growth stage.
- Taxon
- sweet potatoIpomoea batatast0
- Organ / stage
- late growth stagee4
- Treatment
- K24e2
- Outcome
- insoluble acid invertase activitye4
- Direction
- improvede4
- Value
- 5.75%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of potassium on yield, photosynthate distribution, enzymes' activity and ABA content in storage roots of sweet potato (Ipomoea batatas Lam.)”
e2“The storage root yield first increased and then decreased as the increase in potassium fertilizer supply, with the highest increase of 36.42% under treatment of 24 g K2Om-2 (K24)”
e4“improved insoluble acid invertase activity by 5.75% in the late growth stage”
Claim · model-written summary
The dry matter distribution rate of storage roots was significantly higher (69.45%) under K24 treatment.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- K24 treatmente5
- Outcome
- dry matter distribution rate of storage rootse5
- Direction
- significantly highere5
- Value
- 69.45%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of potassium on yield, photosynthate distribution, enzymes' activity and ABA content in storage roots of sweet potato (Ipomoea batatas Lam.)”
e5“The dry matter distribution rate of storage rootswas significantly higher (69.45%) in plants with K24 treatment”
The same questions in other 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
- positive
- no effect
- negative
141 papers more in this group
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