Abstract
Phosphorus (P) deficiency is one of the major problems in agricultural soils for crop production around the world. Mono ammonium phosphate (MAP) as foliar application used an effective tool to enhance nutritional status of fruit trees not only overcome leaf p deficiency but also improve flowering, increase yield and enhance fruit quality. However, use of bio fertilizers such as phosphorus solubilizing bacteria (PSB) proved to friendly environmentally and economical way for increasing P availability and improving P use efficiency under P deficiency conditions. Consequently, the aim of the present trail was to study the effects of MAP at 1% foliar application and/or soil application of phosphorus solubilizing bacteria (PSB) solely or in combination as supplementary P doses (beside H3PO4 common P fertigated source) under calcareous soil conditions on full bloom time, flowering %, yield (kg/tree) and fruit quality not only fruit physical properties i.e. fruit weight, length (L) and circumference (C), shape index (L/C) and fruit firmness but also fruit chemical components via TSS%, acidity%, and TSS/acid ratio as well as nutrient status of macro & micro leaf contents (N,P,K, Fe, Zn and Mn) of "Le Conte" pear trees. The experiment was carried out during the two successive seasons on 12 years old 'Le Conte" pear trees budded on betulifolia rootstocks (Pyrus betulifolia) grown in calcareous soil under drip irrigation system from Nile river source in a private orchid at Km 80 Alex-Cairo desert Road, El-Nubaria district, El-Behaira, Egypt. All trees received the standard horticultural practices & the experiment was designed in a complete randomized block and the treatments were as follows: (T1) control; H3PO4 common P fertigated source. (T2) T1 + MAP at 1 % as foliar application. (T3) T1 + Bacillus megatherium P solubilizing bacteria (PSB) as soil application. (T4) T2 +T3. The result showed that foliar MAP spray (T2) and PSB soil application (T3) independently improved all aforementioned parameters. However, both T2&T3 gave more or less similar result values and no significant differences were detected between them. In this respect, T2&T3 when applied together (T4) maximized to a grate extend enhancement in most studied parameters and increased yield (kg/tree) by about (167%) than the control. Improvement in leaf P nutritional status after MAP foliar spray to an adequate level (>0.3%) in the range of P and N fertilized plants as well as availability of P, Fe, Zn and Mn following soil PSB application improved nutritional status and help in better management of P fertilization in pear trees grown under calcareous soil condition. Generally, T4 (MAP + PSb) is recommended treatment since, it promotes effectively the nutrient status that achieved the shortest time to FBD, highest flowering %, yield and fruit quality of "Le-Conte" pear trees under calcareous soil conditions.
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Claims 8
Claim · model-written summary
MAP alone improved measured pear flowering, yield, fruit quality and leaf nutrients.
- Taxon
- pear trees
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communist0 - Treatment
- foliar MAP spray (T2)e0
- Outcome
- all aforementioned parameterse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“foliar MAP spray (T2) and PSB soil application (T3) independently improved all aforementioned parameters.”
t0“Pear Trees”
Claim · model-written summary
PSB alone improved measured pear flowering, yield, fruit quality and leaf nutrients.
- Taxon
- pear treesPyrus communist0
- Treatment
- PSB soil application (T3)e0
- Interactor
- PSBe0symbiont
- Outcome
- all aforementioned parameterse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar MAP spray (T2) and PSB soil application (T3) independently improved all aforementioned parameters.”
t0“Pear Trees”
Claim · model-written summary
MAP and PSB alone produced similar outcomes without a significant difference.
- Taxon
- pear treesPyrus communist0
- Outcome
- result valuese0
- Direction
- no significant differencese0
- Comparator
- T2&T3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both T2&T3 gave more or less similar result values and no significant differences were detected between them.”
t0“Pear Trees”
Claim · model-written summary
Combined MAP and PSB increased pear yield about 167% relative to control.
- Taxon
- pear treesPyrus communist0
- Treatment
- T2&T3 when applied together (T4)e0
- Outcome
- yield (kg/tree)e0
- Direction
- increasede0
- Value
- 167%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T2&T3 when applied together (T4) maximized to a grate extend enhancement in most studied parameters and increased yield (kg/tree) by about (167%) than the control.”
t0“Pear Trees”
Claim · model-written summary
The combined treatment maximized most measured pear parameters.
- Taxon
- pear treesPyrus communist0
- Treatment
- T2&T3 when applied together (T4)e0
- Outcome
- most studied parameterse0
- Direction
- maximizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T2&T3 when applied together (T4) maximized to a grate extend enhancement in most studied parameters”
t0“Pear Trees”
Claim · model-written summary
MAP foliar spray raised leaf P status to an adequate level above 0.3%.
- Taxon
- pear treesPyrus communist0
- Treatment
- MAP foliar spraye0
- Outcome
- leaf P nutritional statuse0
- Direction
- Improvemente0
- Value
- >0.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Improvement in leaf P nutritional status after MAP foliar spray to an adequate level (>0.3%)”
t0“Pear Trees”
Claim · model-written summary
PSB soil application increased availability of P, Fe, Zn and Mn.
- Taxon
- pear treesPyrus communist0
- Treatment
- soil PSB applicatione0
- Interactor
- PSBe0symbiont
- Outcome
- availability of P, Fe, Zn and Mne0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“availability of P, Fe, Zn and Mn following soil PSB application improved nutritional status”
t0“Pear Trees”
Claim · model-written summary
The authors recommend combined MAP and PSB for pear production under calcareous soil.
- Taxon
- pear treesPyrus communise0
- Outcome
- T4 (MAP + PSb) is recommended treatmente0
- Qualifier
- under calcareous soil conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T4 (MAP + PSb) is recommended treatment since, it promotes effectively the nutrient status that achieved the shortest time to FBD, highest flowering %, yield and fruit quality of "Le-Conte" pear trees under calcareous soil conditions.”
The same questions in other papers
ammonium dihydrogen phosphate · nutrient: content · Pyrus communis (pear)Results agree
1 paper in the same direction as this paper
- positive
application · nutrient: content · Pyrus communis (pear)Positive and negative results
26 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
25 papers more in this group
See all 29 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.