Abstract
Micro-drip irrigation promotes high water and nutrient use efficiency in crops.We aimed to develop a new micro-drip irrigation technology that can reduce the effects of chemical fertilizer input on soil quality while maintaining agricultural productivity. There were four treatments: micro-drip irrigation with 240 (LF), 300 (MF), and 360 kg ha-1 fertilization (HF) and subsurface drip irrigation (SDI) with 240 kg ha-1 fertilization (CK). Micro-drip irrigation decreased N concentration around the roots by >24% compared with SDI, and increased the urease, alkaline phosphatase activities, and partial nitrogen productivity by 31.5%, 37.7%, and 22.1%, respectively. Although the HF treatment increased cucumber yield by 20%–45% compared with LF and MF, the urease and alkaline phosphatase activities decreased by 11.4%–15.3% and 11.5%–23.0%, respectively. Furthermore, the HF treatment significantly increased the N concentration around the roots. There was a negative correlation between soil enzymatic activities and N concentration. Overall, micro-drip irrigation mitigated the inhibition of soil enzymatic activities and increased nutrient uptake and cucumber yield. However, the negative effects of high fertilization on soil quality and N loss were unavoidable. The optimal fertilization level for greenhouse cucumber cultivations was 300 kg N hm-2 under micro-drip irrigation.
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Claims 10
Claim · model-written summary
Micro-drip irrigation lowered nitrogen concentration near cucumber roots by more than 24% relative to subsurface drip irrigation.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- Micro-drip irrigatione0
- Outcome
- N concentration around the rootse0
- Direction
- decreasede0
- Value
- >24%e0
- Comparator
- SDIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“Micro-drip irrigation decreased N concentration around the roots by >24% compared with SDI”
Claim · model-written summary
Micro-drip irrigation raised soil urease activity by 31.5%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Micro-drip irrigatione2
- Outcome
- ureasee0
- Direction
- increasede0
- Value
- 31.5%e0
- Comparator
- SDIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“increased the urease, alkaline phosphatase activities, and partial nitrogen productivity by 31.5%, 37.7%, and 22.1%, respectively”
e1“compared with SDI”
e2“Micro-drip irrigation decreased N concentration around the roots by >24% compared with SDI”
Claim · model-written summary
Micro-drip irrigation raised soil alkaline phosphatase activity by 37.7%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Micro-drip irrigatione0
- Outcome
- alkaline phosphatase activitiese0
- Direction
- increasede0
- Value
- 37.7%e0
- Comparator
- SDIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“Micro-drip irrigation decreased N concentration around the roots by >24% compared with SDI, and increased the urease, alkaline phosphatase activities, and partial nitrogen productivity by 31.5%, 37.7%, and 22.1%, respectively”
Claim · model-written summary
Micro-drip irrigation raised partial nitrogen productivity by 22.1%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Micro-drip irrigatione0
- Outcome
- partial nitrogen productivitye0
- Direction
- increasede0
- Value
- 22.1%e0
- Comparator
- SDIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“Micro-drip irrigation decreased N concentration around the roots by >24% compared with SDI, and increased the urease, alkaline phosphatase activities, and partial nitrogen productivity by 31.5%, 37.7%, and 22.1%, respectively”
Claim · model-written summary
High fertilization raised cucumber yield by 20%–45% versus low and medium fertilization.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- HF treatmente0
- Outcome
- cucumber yielde0
- Direction
- increasede0
- Value
- 20%–45%e0
- Comparator
- LF and MFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the HF treatment increased cucumber yield by 20%–45% compared with LF and MF”
Claim · model-written summary
High fertilization lowered soil urease activity by 11.4%–15.3%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- HF treatmente0
- Outcome
- ureasee0
- Direction
- decreasede0
- Value
- 11.4%–15.3%e0
- Comparator
- LF and MFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“HF treatment increased cucumber yield by 20%–45% compared with LF and MF, the urease and alkaline phosphatase activities decreased by 11.4%–15.3% and 11.5%–23.0%, respectively”
Claim · model-written summary
High fertilization lowered soil alkaline phosphatase activity by 11.5%–23.0%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- HF treatmente0
- Outcome
- alkaline phosphatase activitiese0
- Direction
- decreasede0
- Value
- 11.5%–23.0%e0
- Comparator
- LF and MFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“HF treatment increased cucumber yield by 20%–45% compared with LF and MF, the urease and alkaline phosphatase activities decreased by 11.4%–15.3% and 11.5%–23.0%, respectively”
Claim · model-written summary
High fertilization significantly raised nitrogen concentration around cucumber roots.
- Taxon
- cucumberCucumis sativust0
- Treatment
- HF treatmente0
- Outcome
- N concentration around the rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“the HF treatment significantly increased the N concentration around the roots”
Claim · model-written summary
Soil enzyme activities were negatively correlated with nitrogen concentration.
- Taxon
- cucumberCucumis sativust0
- Compound
- Ne0
- Outcome
- soil enzymatic activitiese0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber (Cucumis sativus L.)”
e0“negative correlation between soil enzymatic activities and N concentration”
Claim · model-written summary
The authors identified 300 kg N hm-2 under micro-drip irrigation as the optimal fertilization level for greenhouse cucumber.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- micro-drip irrigatione0
- Outcome
- optimal fertilization levele0
- Value
- 300 kg N hm-2e0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal fertilization level for greenhouse cucumber cultivations was 300 kg N hm-2 under micro-drip irrigation”
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