Abstract
In order to provide a theoretical basis for rational application of phosphate fertilizer,a sand culture experiment was conducted to study the change of several important physiological indexes at different growth stages of watermelon under different amounts of exogenous phosphorus. The results indicate that the chlorophyll value-SPAD values are decreased under the excess phosphorus at the vegetative growth period,and thus the crop photosynthesis is affected. The phosphorus deficiency symptoms are appeared at the seedling stage. The nucleic acid content of leaves is decreased at the flowering stage under the phosphorus deficiency, which means the growth and development of watermelon is inhibited if there is no sufficient exogenous phosphorus. The cellulose contents of stems are decreased under the excess supply of phosphate fertilizer,which results in plant resistance reduction.Different trends of the pectin contents at different growth stages are observed under different amounts of exogenous phosphorus.
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Claims 5
Claim · model-written summary
Excess phosphorus decreased watermelon chlorophyll SPAD values during vegetative growth.
- Taxon
- watermelon
Citrullus lanatust0 - Organ / stage
- vegetative growth periode0
- Treatment
- excess phosphoruse0
- Outcome
- chlorophyll value-SPAD valuese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the chlorophyll value-SPAD values are decreased under the excess phosphorus at the vegetative growth period”
t0“watermelon”
Claim · model-written summary
Phosphorus deficiency symptoms appeared in watermelon seedlings.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- seedling stagee0
- Outcome
- phosphorus deficiency symptomse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The phosphorus deficiency symptoms are appeared at the seedling stage.”
t0“watermelon”
Claim · model-written summary
Phosphorus deficiency decreased watermelon leaf nucleic acid content at flowering.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- leavese0
- Treatment
- phosphorus deficiencye0
- Outcome
- nucleic acid contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nucleic acid content of leaves is decreased at the flowering stage under the phosphorus deficiency”
t0“watermelon”
Claim · model-written summary
Excess phosphate fertilizer decreased cellulose content of watermelon stems.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- stemse0
- Treatment
- excess supply of phosphate fertilizere0
- Outcome
- cellulose contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cellulose contents of stems are decreased under the excess supply of phosphate fertilizer”
t0“watermelon”
Claim · model-written summary
Watermelon pectin content trends differed by growth stage and phosphorus amount.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- different amounts of exogenous phosphoruse0
- Outcome
- pectin contentse0
- Direction
- Different trendse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different trends of the pectin contents at different growth stages are observed under different amounts of exogenous phosphorus.”
t0“watermelon”
The same questions in other papers
phosphorus · physiology: pigments · Citrullus lanatus (watermelon)Positive and negative results
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12 papers more in this group
See all 16 papers →phosphorus · molecular: metabolites · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
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.