Abstract
The labor-saving intensive planting of Korla fragrant pear has emerged as an innovative cultivation model in recent years. Exploring drip irrigation methods and nitrogen application rates compatible with this model is crucial for mitigating soil salinization and improving the yield and quality of fragrant pears. A field experiment was conducted to evaluate the effects of drip irrigation methods and nitrogen application rates on the soil salt accumulation (SSA), soil nitrogen content, fruit yield and quality of fragrant pears during the growing seasons of 2022 and 2023 in Xinjiang, China. Two drip irrigation methods, i.e., surface drip irrigation (DI) and subsurface drip irrigation (SDI), and four nitrogen application rates, i.e., 100 kg ha −1 (N1), 200 kg ha −1 (N2), 300 kg ha −1 (N3), and 400 (N4) kg ha −1 , were included. The results showed that the SDI treatment significantly reduced the SSA in the root zone of pear trees by 1.5–3.8 g kg −1 during the growing stages. The lowest SSA was obtained at nitrogen application rates of 300 kg ha −1 and 200 kg ha −1 under the DI and SDI treatments, respectively. In addition, the overall quality score was evaluated via principal component analysis (PCA). The yield and overall quality score under the SDI treatment were 10.7–24.4 % and 150.2–315.3 % higher than those under the DI treatment. The pear yield and overall quality increased and then decreased with increasing nitrogen application rate, with appropriate values of 300 kg ha −1 and 200 kg ha −1 under the DI and SDI treatments, respectively. The structural equation model (SEM) indicated that drip irrigation methods and nitrogen application rates primarily improved pear yield and overall quality by reducing soil salinity. Considering the soil salinity, pear yield and quality, SDI combined with 200 kg ha −1 nitrogen application is recommended for the young Korla fragrant pear trees. • SDI significantly reduced soil salt accumulation. • Drip irrigation method is the dominant factor affecting pear yield and quality. • Appropriate nitrogen application for SDI and DI were 200 kg ha −1 and 300 kg ha −1 .
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Claims 9
Claim · model-written summary
Subsurface drip irrigation reduced root-zone soil salt accumulation by 1.5–3.8 g kg −1.
- Taxon
- pear trees
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communise1 - Treatment
- SDI treatmente1
- Outcome
- SSAe1
- Direction
- reducede1
- Value
- 1.5–3.8 g kg −1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e1“the SDI treatment significantly reduced the SSA in the root zone of pear trees by 1.5–3.8 g kg −1 during the growing stages”
Claim · model-written summary
Lowest soil salt accumulation occurred at 300 kg ha −1 nitrogen under DI.
Not reportedTaxon
Verbatim
e1“The lowest SSA was obtained at nitrogen application rates of 300 kg ha −1 and 200 kg ha −1 under the DI and SDI treatments, respectively”
Claim · model-written summary
Lowest soil salt accumulation occurred at 200 kg ha −1 nitrogen under SDI.
Not reportedTaxon
Verbatim
e1“The lowest SSA was obtained at nitrogen application rates of 300 kg ha −1 and 200 kg ha −1 under the DI and SDI treatments, respectively”
Claim · model-written summary
Yield under SDI was 10.7–24.4 % higher than DI.
Not reportedTaxon
Verbatim
e1“The yield and overall quality score under the SDI treatment were 10.7–24.4 % and 150.2–315.3 % higher than those under the DI treatment”
Claim · model-written summary
Overall quality score under SDI was 150.2–315.3 % higher than DI.
- Treatment
- SDI treatmente1
- Outcome
- overall quality scoree1
- Direction
- highere1
- Value
- 150.2–315.3 %e1
- Comparator
- DI treatmente1
Not reportedTaxon
Verbatim
e1“The yield and overall quality score under the SDI treatment were 10.7–24.4 % and 150.2–315.3 % higher than those under the DI treatment”
Claim · model-written summary
Pear yield increased then decreased with increasing nitrogen rate.
- Taxon
- pearPyrus communise1
- Treatment
- nitrogen application ratee1
- Outcome
- yielde1
- Direction
- increased and then decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The pear yield and overall quality increased and then decreased with increasing nitrogen application rate”
Claim · model-written summary
Overall pear quality increased then decreased with increasing nitrogen rate.
- Taxon
- pearPyrus communise1
- Treatment
- nitrogen application ratee1
- Outcome
- overall qualitye1
- Direction
- increased and then decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The pear yield and overall quality increased and then decreased with increasing nitrogen application rate”
Claim · model-written summary
Irrigation and nitrogen primarily improved yield and quality through reduced soil salinity.
- Taxon
- pearPyrus communise1
- Treatment
- drip irrigation methods and nitrogen application ratese1
- Outcome
- yield and overall qualitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The structural equation model (SEM) indicated that drip irrigation methods and nitrogen application rates primarily improved pear yield and overall quality by reducing soil salinity”
Claim · model-written summary
SDI with 200 kg ha −1 nitrogen was recommended for young Korla fragrant pear trees.
Verbatim
e1“SDI combined with 200 kg ha −1 nitrogen application is recommended for the young Korla fragrant pear trees”
The same questions in other papers
irrigation · yield · Pyrus communis (pear)Positive and negative results
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- negative
- negative
- no effect
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See all 23 papers →irrigation · quality: general · Pyrus communis (pear)Results agree
2 papers in the same direction as this paper
- positive
- positive
irrigation · molecular: metabolites · Pyrus communis (pear)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.