Abstract
Pool experiment was conducted to investigate the responses of photosynthetic characteristics,chlorophyll fluorescence parameters, and yield of summer maize to different supplemental irrigations using four cultivars of Zhengdan958,Zhongke11,Xundan20 and Xundan22 as materials.Maize growth was inhibited following the supplemental irrigations was reduced.Leaf area index,net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),intercellular CO2 concentration(Ci),chlorophyll relative content(SPAD) and photochemical quenching(qP) also decreased,while the leaf water use efficiency(LWUE) increased with the decreasing of irrigation.The difference between normal irrigation and moderate deficit was not significant,while that between normal irrigation and severe deficit was significant.The initial fluorescent(Fo),PSⅡ biggest photochemical efficiency(Fv/Fm) and non-photochemical quenching(NPQ) showed insignificant changes.The results indicated that the reduction in photosynthetic capacity and light energy transfer efficiency were the main factors for the loss in yield.However,various cultivars showed different changing amplitude,the smaller changing amplitude showed less influence by drought stress and relatively stronger drought resistance.Cultivars performance on drought resistance is Zhongke11 Zhengdan958 and Xundan20 Xundan22.Because of regional climate effects,moderate supplementary irrigation play key roles in saving water and stabilizing production under seasonal drought condition.
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Claims 11
Claim · model-written summary
Reduced supplemental irrigation inhibited maize growth.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize growth was inhibited following the supplemental irrigations was reduced.”
Claim · model-written summary
Leaf area index, photosynthetic and gas exchange measures, chlorophyll content and photochemical quenching decreased as irrigation decreased.
- Treatment
- decreasing of irrigatione0
- Outcome
- Leaf area index,net photosynthetic rate(Pn),transpiration rate(Tr)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area index,net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),intercellular CO2 concentration(Ci),chlorophyll relative content(SPAD) and photochemical quenching(qP) also decreased,while the leaf water use efficiency(LWUE) increased with the decreasing of irrigation.”
t0“summer maize”
Claim · model-written summary
Chlorophyll content and photochemical quenching decreased with decreasing irrigation.
- Treatment
- decreasing of irrigatione0
- Outcome
- chlorophyll relative content(SPAD) and photochemical quenching(qP)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll relative content(SPAD) and photochemical quenching(qP) also decreased,while the leaf water use efficiency(LWUE) increased with the decreasing of irrigation.”
t0“summer maize”
Claim · model-written summary
Leaf water use efficiency increased with decreasing irrigation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf water use efficiency(LWUE) increased with the decreasing of irrigation.”
t0“summer maize”
Claim · model-written summary
Normal irrigation and moderate deficit did not differ significantly.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The difference between normal irrigation and moderate deficit was not significant,while that between normal irrigation and severe deficit was significant.”
t0“summer maize”
Claim · model-written summary
Normal irrigation and severe deficit differed significantly.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The difference between normal irrigation and moderate deficit was not significant,while that between normal irrigation and severe deficit was significant.”
t0“summer maize”
Claim · model-written summary
Initial fluorescence, maximum photochemical efficiency and nonphotochemical quenching changed insignificantly.
- Treatment
- complementary irrigationt0
- Outcome
- initial fluorescent(Fo),PSⅡ biggest photochemical efficiency(Fv/Fm) and non-photochemical quenching(NPQ)e0
- Direction
- insignificant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The initial fluorescent(Fo),PSⅡ biggest photochemical efficiency(Fv/Fm) and non-photochemical quenching(NPQ) showed insignificant changes.”
t0“complementary irrigation on photosynthesis and chlorophyll fluorescence characteristics in summer maize”
Claim · model-written summary
Reduced photosynthetic capacity and light energy transfer efficiency were identified as the main factors in yield loss.
- Outcome
- loss in yielde0
- Qualifier
- reduction in photosynthetic capacity and light energy transfer efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduction in photosynthetic capacity and light energy transfer efficiency were the main factors for the loss in yield.”
t0“summer maize”
Claim · model-written summary
Cultivars with smaller changes were less affected by drought stress and had stronger drought resistance.
- Material
- various cultivarse0
- Outcome
- drought resistancee0
- Direction
- strongere0
- Qualifier
- smaller changing amplitudee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However,various cultivars showed different changing amplitude,the smaller changing amplitude showed less influence by drought stress and relatively stronger drought resistance.”
t0“summer maize”
Claim · model-written summary
Zhongke11 and Zhengdan958 were ranked ahead of Xundan20 and Xundan22 for drought resistance.
- Material
- Zhongke11 Zhengdan958 and Xundan20 Xundan22e0
- Outcome
- Cultivars performance on drought resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivars performance on drought resistance is Zhongke11 Zhengdan958 and Xundan20 Xundan22.”
t0“summer maize”
Claim · model-written summary
Moderate supplementary irrigation was recommended for saving water and stabilizing production under seasonal drought.
- Treatment
- moderate supplementary irrigatione0
- Outcome
- saving water and stabilizing productione0
- Qualifier
- seasonal drought conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“moderate supplementary irrigation play key roles in saving water and stabilizing production under seasonal drought condition.”
t0“summer maize”
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