Abstract
Introduction. High–density orchards of ‘Amrapali’ mango trees become overcrowded and show progressive decline in yield after 14–15 years of planting; hence, trees require pruning for sustainable production. Reduction in yield in such orchards is due to poor light interception and a low photosynthetic rate, which influence vegetative growth, flower initiation, fruit set and, thereby, the fruit yield. Hence, to help design a tree canopy for optimum plant growth and yield, we studied the effect of pruning on light interception and on different leaf physiological parameters of ‘Amrapali’ mango trees under high density. Materials and methods. Sixteen-year-old trees of an ‘Amrapali’ mango high-density orchard were subjected to tipping and light, moderate and heavy pruning; un-pruned trees were used as control. The available photosynthetic photon flux (PPF) and leaf physiological parameters such as rate of photosynthesis, specific leaf weight (SLW) and leaf chlorophyll (Chl) content were measured in pruned and un-pruned tree canopies, following standard procedures. Results and discussion. The percent available PPF was greater in all pruned tree canopies than in un-pruned tree canopies; this could be due to tree openness caused by pruning. The light interception was lower at the lowest height of the tree canopy, probably because the center of the tree canopy was partially blocked by new growth or criss-cross branches. The rate of photosynthesis was greater in leaves that developed in pruned tree canopies than in those developed in un-pruned tree canopies, although there was no difference in SLW; this could be due to better light interception in pruned trees. In contrast, total leaf chlorophyll content was the highest in leaves that developed in un-pruned and tipped tree canopies; this may be due to increased shade owing to overlapping or crowding of tree canopies in these trees, indicating that mango leaves that developed in shade appeared to be more physiologically efficient at synthesizing chlorophyll than leaves that grew in the sun or on the sunny side. Conclusions. The studies indicated that pruning ‘Amrapali’ mango trees by removing about 10–15 cm of the top from old branches improves light penetration, which influences the leaf physiology considerably. Hence, it would be useful for designing high-density ‘Amrapali’ mango orchards to maximize productivity, although it requires additional studies to recommend a particular pruning intensity.
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Claims 8
Claim · model-written summary
Pruned mango canopies had greater percent available photosynthetic photon flux than un-pruned canopies.
- Taxon
- mango
_from_India.jpg?width=60)
Mangifera indicat0 - Treatment
- pruned tree canopiese1
- Outcome
- percent available PPFe1
- Direction
- greatere1
- Comparator
- un-pruned tree canopiese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_from_India.jpg?width=500)
Verbatim
t0“high-density orchards of mango trees”
e1“The percent available PPF was greater in all pruned tree canopies than in un-pruned tree canopies”
Claim · model-written summary
Light interception was lower at the lowest height of the mango tree canopy.
- Taxon
- mangoMangifera indicat0
- Organ / stage
- lowest height of the tree canopye2
- Outcome
- light interceptione2
- Direction
- lowere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-density orchards of mango trees”
e2“The light interception was lower at the lowest height of the tree canopy”
Claim · model-written summary
The rate of photosynthesis was greater in mango leaves developed in pruned canopies than in leaves from un-pruned canopies.
- Taxon
- mangoMangifera indicat0
- Organ / stage
- leavese3
- Treatment
- pruned tree canopiese3
- Outcome
- rate of photosynthesise3
- Direction
- greatere3
- Comparator
- un-pruned tree canopiese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-density orchards of mango trees”
e3“The rate of photosynthesis was greater in leaves that developed in pruned tree canopies than in those developed in un-pruned tree canopies”
Claim · model-written summary
Specific leaf weight did not differ between pruned and un-pruned mango canopies.
- Taxon
- mangoMangifera indicat0
- Treatment
- pruned tree canopiese3
- Outcome
- SLWe4
- Direction
- no differencee4
- Comparator
- un-pruned tree canopiese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-density orchards of mango trees”
e3“The rate of photosynthesis was greater in leaves that developed in pruned tree canopies than in those developed in un-pruned tree canopies”
e4“although there was no difference in SLW”
Claim · model-written summary
Total leaf chlorophyll content was highest in leaves developed in un-pruned and tipped mango canopies.
- Taxon
- mangoMangifera indicat0
- Organ / stage
- leavese5
- Treatment
- un-pruned and tipped tree canopiese5
- Outcome
- total leaf chlorophyll contente5
- Direction
- higheste5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-density orchards of mango trees”
e5“In contrast, total leaf chlorophyll content was the highest in leaves that developed in un-pruned and tipped tree canopies”
Claim · model-written summary
Mango leaves developed in shade may be more efficient at synthesizing chlorophyll than sun leaves.
- Taxon
- mangoMangifera indicat0
- Treatment
- increased shadee7
- Outcome
- more physiologically efficient at synthesizing chlorophylle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-density orchards of mango trees”
e6“mango leaves that developed in shade appeared to be more physiologically efficient at synthesizing chlorophyll than leaves that grew in the sun”
e7“this may be due to increased shade owing to overlapping or crowding of tree canopies in these trees”
Claim · model-written summary
Removing about 10–15 cm of the top from old branches improves light penetration in mango trees.
- Taxon
- mangoMangifera indicat0
- Treatment
- removing about 10–15 cm of the top from old branchese7
- Outcome
- light penetratione7
- Direction
- improvese7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-density orchards of mango trees”
e7“pruning ‘Amrapali’ mango trees by removing about 10–15 cm of the top from old branches improves light penetration”
Claim · model-written summary
High-density ‘Amrapali’ mango orchards pruned as described would be useful to maximize productivity.
- Taxon
- mangoMangifera indicat0
- Outcome
- maximize productivitye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-density orchards of mango trees”
e7“it would be useful for designing high-density ‘Amrapali’ mango orchards to maximize productivity”
The same questions in other papers
pruning · physiology: photosynthesis · Mangifera indica (mango)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
pruning · growth · Mangifera indica (mango)Positive and negative results
5 papers in the same direction as this paper · 20 in the opposite direction
- positive
- no effect
- positive
22 papers more in this group
See all 26 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.