Abstract
[Objective] Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied to provide a basis for high-yield and efficient use of nitrogen fertilizer of late sown winter wheat in Yellow and Huai Valley in China.[Method] We conducted an experiment to study the effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat in 2007-2008.[Result] The results showed that,compared with normal sowing(October 15),late sowing(October 26) enhanced the activity of nitrate reductase and the soluble protein content in flag leaf.However,the nitrogen accumulation amount of whole plant,nitrogen concentration of grain,grain yield and nitrogen use efficiency of that were reduced because of shorter growing period.Under the condition of late sowing,the activity of nitrate reductase,glutamine synthetase,the soluble protein content in flag leaf was higher under medium plant density(225×104 plants/hm2) and high plant densities(300×104 plants/hm2) than that under low density,so were the leaf nitrogen content,the contribution of translocation nitrogen to grain nitrogen accumulation.Thus,grain yield and nitrogen use efficiency under medium and high plant densities(300×104 plants/hm2) were higher than that under low density.[Conclusion] In the areas with the condition similar to this experiment,when considering both yield and grain quality,Xinmai 18 is suggested with the densities 225×104 plants/hm2 for moderate late sowing.
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Claims 7
Claim · model-written summary
Late sowing enhanced nitrate reductase activity and soluble protein content in flag leaf compared with normal sowing.
- Taxon
- winter wheat
Triticum aestivume0 - Organ / stage
- flag leafe1
- Treatment
- late sowing(October 26)e1
- Outcome
- the activity of nitrate reductase and the soluble protein content in flag leafe1
- Direction
- enhancede1
- Comparator
- normal sowing(October 15)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied”
e1“compared with normal sowing(October 15),late sowing(October 26) enhanced the activity of nitrate reductase and the soluble protein content in flag leaf”
Claim · model-written summary
Late sowing reduced whole-plant nitrogen accumulation, grain nitrogen concentration and grain yield because of shorter growing period.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- late sowing(October 26)e1
- Outcome
- nitrogen accumulation amount of whole plant,nitrogen concentration of grain,grain yielde2
- Direction
- reducede2
- Qualifier
- because of shorter growing periode2
- Comparator
- normal sowing(October 15)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied”
e1“compared with normal sowing(October 15),late sowing(October 26) enhanced the activity of nitrate reductase and the soluble protein content in flag leaf”
e2“the nitrogen accumulation amount of whole plant,nitrogen concentration of grain,grain yield and nitrogen use efficiency of that were reduced because of shorter growing period”
Claim · model-written summary
Late sowing reduced nitrogen use efficiency because of shorter growing period.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- late sowing(October 26)e1
- Outcome
- nitrogen use efficiencye2
- Direction
- reducede2
- Qualifier
- because of shorter growing periode2
- Comparator
- normal sowing(October 15)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied”
e1“compared with normal sowing(October 15),late sowing(October 26) enhanced the activity of nitrate reductase and the soluble protein content in flag leaf”
e2“the nitrogen accumulation amount of whole plant,nitrogen concentration of grain,grain yield and nitrogen use efficiency of that were reduced because of shorter growing period”
Claim · model-written summary
Under late sowing, medium and high plant densities raised nitrate reductase, glutamine synthetase and soluble protein content in flag leaf compared with low density.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- flag leafe3
- Treatment
- medium plant density(225×104 plants/hm2) and high plant densities(300×104 plants/hm2)e3
- Outcome
- the activity of nitrate reductase,glutamine synthetase,the soluble protein content in flag leafe3
- Direction
- highere3
- Qualifier
- Under the condition of late sowinge3
- Comparator
- low densitye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied”
e3“Under the condition of late sowing,the activity of nitrate reductase,glutamine synthetase,the soluble protein content in flag leaf was higher under medium plant density(225×104 plants/hm2) and high plant densities(300×104 plants/hm2) than that under low density”
Claim · model-written summary
Under late sowing, medium and high plant densities raised leaf nitrogen content and the contribution of translocated nitrogen to grain nitrogen accumulation compared with low density.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- medium plant density(225×104 plants/hm2) and high plant densities(300×104 plants/hm2)e3
- Outcome
- leaf nitrogen content,the contribution of translocation nitrogen to grain nitrogen accumulatione4
- Direction
- highere3
- Qualifier
- Under the condition of late sowinge3
- Comparator
- low densitye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied”
e3“Under the condition of late sowing,the activity of nitrate reductase,glutamine synthetase,the soluble protein content in flag leaf was higher under medium plant density(225×104 plants/hm2) and high plant densities(300×104 plants/hm2) than that under low density”
e4“so were the leaf nitrogen content,the contribution of translocation nitrogen to grain nitrogen accumulation”
Claim · model-written summary
Under late sowing, medium and high plant densities gave higher grain yield and nitrogen use efficiency than low density.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- medium and high plant densities(300×104 plants/hm2)e5
- Outcome
- grain yield and nitrogen use efficiencye5
- Direction
- highere5
- Comparator
- low densitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied”
e5“grain yield and nitrogen use efficiency under medium and high plant densities(300×104 plants/hm2) were higher than that under low density”
Claim · model-written summary
Xinmai 18 at 225×104 plants/hm2 is suggested for moderate late sowing when yield and grain quality are both considered.
- Taxon
- winter wheatTriticum aestivume0
- Material
- Xinmai 18e6
- Treatment
- densities 225×104 plants/hm2e6
- Outcome
- for moderate late sowinge6
- Qualifier
- when considering both yield and grain qualitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of plant density on nitrogen metabolism and nitrogen use efficiency of late sown winter wheat were studied”
e6“when considering both yield and grain quality, Xinmai 18 is suggested with the densities 225×104 plants/hm2 for moderate late sowing”
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