Abstract
The effects of different nitrogen forms(nitrate,ammonium and the mixture of nitrate and ammonium) and water stress on the relationship between growth and water supply of paddy plants under hydroponic conditions are studied.The results show that,under a slight water stress(5% of PEG),the biomass of paddy plants under nutrient supply of ammonium and the mixture of nitrate and ammonium is higher than that under the normal moisture conditions,which reveals that a slight water stress can stimulate the growth of paddy plants under nutrient supply of these two nitrogen forms.Under severe water stress(10% of PEG),the biomass of paddy plants under nutrient supply of ammonium is higher than that under the normal moisture conditions.Furthermore,the effects of water stress on root length,root surface area and root volume of paddy plants under nutrient supply of ammonium are not so significant.Under sever water stress,the flux of xylem sap and water use efficiency of paddy plants under nutrient supply of ammonium is higher than that under nutrient supply of other two nitrogen forms.The results also reveal that ammonium nutrition can improve the growth of paddy plants under water stress comparing with that of other two nitrogen forms.
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Claims 5
Claim · model-written summary
Slight water stress(5% of PEG) increased paddy plant biomass under ammonium and mixed nitrate-ammonium supply compared with normal moisture.
Verbatim
e1“under a slight water stress(5% of PEG),the biomass of paddy plants under nutrient supply of ammonium and the mixture of nitrate and ammonium is higher than that under the normal moisture conditions”
Claim · model-written summary
Under severe water stress(10% of PEG), paddy plant biomass under ammonium supply was higher than under normal moisture.
Verbatim
e2“Under severe water stress(10% of PEG),the biomass of paddy plants under nutrient supply of ammonium is higher than that under the normal moisture conditions”
Claim · model-written summary
Water stress had no significant effect on root length, root surface area and root volume of paddy plants under ammonium supply.
- Taxon
- paddy plantse3
- Treatment
- water stresse3
- Outcome
- root length,root surface area and root volumee3
- Direction
- no_changeinferrede3
- Qualifier
- not so significante3
Not reportedComparator
Verbatim
e3“Furthermore,the effects of water stress on root length,root surface area and root volume of paddy plants under nutrient supply of ammonium are not so significant”
Claim · model-written summary
Under severe water stress, xylem sap flux and water use efficiency of paddy plants under ammonium supply were higher than under the other two nitrogen forms.
Verbatim
e4“Under sever water stress,the flux of xylem sap and water use efficiency of paddy plants under nutrient supply of ammonium is higher than that under nutrient supply of other two nitrogen forms”
Claim · model-written summary
Ammonium nutrition improved the growth of paddy plants under water stress compared with the other two nitrogen forms.
Verbatim
e5“ammonium nutrition can improve the growth of paddy plants under water stress comparing with that of other two nitrogen forms”
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