Abstract
A huge amount of precipitation and higher water table during rapeseed growing season in Yangtze River regions grown with rice and rapeseed rotation system and heavy soil result in frequent waterlogging occurrence.A pot experiment was performed at four growth stages with three waterlogging time treatments which were followed by normal water administration.Two rapeseed lines with different levels of waterlogging tolerance were used to investigate the effects of the sustainable waterlogging time on rapeseed growth and yield.The treatments were waterlogging of 10,20 and 30 days at seedling and budding stages and 10,15 and 20 days at flowering and maturity stages.The results showed that (1) the sustainable waterlogging time affected the development of roots,the growth of up-ground part of plant and yield,which was significantly different between two lines;(2) waterlogging at seedling stage led to the decrease of chlorophyll content in leaves,and the increase of malondialdehyde and proline contents;(3) sensitivity to waterlogging judged by yield in different developmental stages of rapeseed ranked in the order of budding stage,flowering stage,seedling stage,podding and maturity stages;(4) the research on effects of sustainable waterlogging time on yield can provide a basis for estimating the influence of continuous rainfall on rapeseed production.
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Claims 7
Claim · model-written summary
Waterlogging duration affected root development.
- Taxon
- Rapeseedt0
- Material
- two linese0
- Treatment
- sustainable waterlogging timee0
- Outcome
- development of rootse0
Not reportedComparatorDirection
Verbatim
e0“the sustainable waterlogging time affected the development of roots,the growth of up-ground part of plant and yield,which was significantly different between two lines;”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Waterlogging duration affected shoot growth.
Not reportedComparatorDirection
Verbatim
e0“the sustainable waterlogging time affected the development of roots,the growth of up-ground part of plant and yield,which was significantly different between two lines;”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Waterlogging duration affected yield differently between lines.
Not reportedDirection
Verbatim
e0“the sustainable waterlogging time affected the development of roots,the growth of up-ground part of plant and yield,which was significantly different between two lines;”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Seedling-stage waterlogging decreased leaf chlorophyll.
- Taxon
- Rapeseedt0
- Treatment
- waterlogging at seedling stagee0
- Outcome
- chlorophyll content in leavese0
- Direction
- decreasee0
Not reportedComparator
Verbatim
e0“waterlogging at seedling stage led to the decrease of chlorophyll content in leaves”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Seedling-stage waterlogging increased malondialdehyde.
Not reportedComparator
Verbatim
e0“waterlogging at seedling stage led to the decrease of chlorophyll content in leaves,and the increase of malondialdehyde and proline contents”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Seedling-stage waterlogging increased proline.
- Taxon
- Rapeseedt0
- Treatment
- waterlogging at seedling stagee0
- Outcome
- proline contentse0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“waterlogging at seedling stage led to the decrease of chlorophyll content in leaves,and the increase of malondialdehyde and proline contents”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
By yield, budding was the most sensitive stage, followed by flowering, seedling, podding, and maturity.
Verbatim
e0“sensitivity to waterlogging judged by yield in different developmental stages of rapeseed ranked in the order of budding stage,flowering stage,seedling stage,podding and maturity stages”
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