Abstract
In order to investigate the effect of nitrogen level,seeding density and seedling age on seedling quality of rice,a two-factor experiment including four N levels(10.3,20.7,31.0 and 41.4 g/m2)and four seeding densities(353,706,1059 and 1412 plants/m2)was conducted at Taoyuan town,Yongsheng county,Yunnan Province.Dynamic of leaf age,tiller number,dry weight,leaf SPAD value of seeding and leaf area index(LAI)in seedling nursery were investigated using an indica hybrid rice,Xieyou 107 as material.The low seeding densities or high N levels decreased the effective accumulated temperature for leaf emergence on stem and accelerate the leaf emergence,especially for seeding densities;Tiller number per seedling decreased with the development of seedling under high seeding density or low N level,whereas increased till 27 days after sowing then decreased under low seeding densities or high N levels;Nitrogen application promoted the emergence of new tillers,the maintenance of tiller with more than three leaves and the increase of LAI in seedling nursery,dry weight and N content of plant;The increased seeding density had negative effects on seedling quality indices,including the emergence of new tillers,the maintenance of tillers with more than three leaves,dry weight and N content of plants whereas showed positive effects on the LAI of seedling nursery,and the effects were more obvious than nitrogen treatments.
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Claims 9
Claim · model-written summary
Low seeding density or high N level decreased the effective accumulated temperature for leaf emergence on the stem.
- Taxon
- rice
Oryza sativae0 - Material
- Xieyou 107e2
- Treatment
- low seeding densities or high N levelse3
- Outcome
- effective accumulated temperature for leaf emergence on steme3
- Direction
- decreasede3
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e3“The low seeding densities or high N levels decreased the effective accumulated temperature for leaf emergence on stem and accelerate the leaf emergence”
Claim · model-written summary
Low seeding density or high N level accelerated leaf emergence, especially under seeding density.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- low seeding densities or high N levelse3
- Outcome
- leaf emergencee3
- Direction
- acceleratee3
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e3“The low seeding densities or high N levels decreased the effective accumulated temperature for leaf emergence on stem and accelerate the leaf emergence”
Claim · model-written summary
Tiller number per seedling decreased with seedling development under high seeding density or low N level.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- high seeding density or low N levele4
- Outcome
- Tiller number per seedlinge4
- Direction
- decreasede4
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e4“Tiller number per seedling decreased with the development of seedling under high seeding density or low N level,whereas increased till 27 days after sowing then decreased under low seeding densities or high N levels”
Claim · model-written summary
Under low seeding density or high N level, tiller number per seedling increased until 27 days after sowing and then decreased.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- low seeding densities or high N levelse4
- Outcome
- Tiller number per seedlinge4
- Direction
- increasede4
- Qualifier
- till 27 days after sowing then decreasede4
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e4“Tiller number per seedling decreased with the development of seedling under high seeding density or low N level,whereas increased till 27 days after sowing then decreased under low seeding densities or high N levels”
Claim · model-written summary
Nitrogen application promoted the emergence of new tillers, the maintenance of tillers with more than three leaves, and LAI in the seedling nursery.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- Nitrogen applicatione5
- Outcome
- the emergence of new tillers, the maintenance of tiller with more than three leaves and the increase of LAI in seedling nurserye5
- Direction
- promotede5
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e5“Nitrogen application promoted the emergence of new tillers, the maintenance of tiller with more than three leaves and the increase of LAI in seedling nursery,dry weight and N content of plant”
Claim · model-written summary
Nitrogen application increased dry weight and N content of rice seedlings.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- Nitrogen applicatione5
- Outcome
- dry weight and N content of plante5
- Direction
- increasee5
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e5“Nitrogen application promoted the emergence of new tillers, the maintenance of tiller with more than three leaves and the increase of LAI in seedling nursery,dry weight and N content of plant”
Claim · model-written summary
Increased seeding density had negative effects on the emergence of new tillers and the maintenance of tillers with more than three leaves; the effects were more obvious than nitrogen treatments.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- increased seeding densitye6
- Outcome
- the emergence of new tillers, the maintenance of tillers with more than three leavese6
- Direction
- decreaseinferrede6
- Qualifier
- the effects were more obvious than nitrogen treatmentse6
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e6“The increased seeding density had negative effects on seedling quality indices,including the emergence of new tillers, the maintenance of tillers with more than three leaves,dry weight and N content of plants whereas showed positive effects on the LAI of seedling nursery,and the effects were more obvious than nitrogen treatments”
Claim · model-written summary
Increased seeding density had negative effects on dry weight and N content of rice seedlings; the effects were more obvious than nitrogen treatments.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- increased seeding densitye6
- Outcome
- dry weight and N content of plantse6
- Direction
- decreaseinferrede6
- Qualifier
- the effects were more obvious than nitrogen treatmentse6
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e6“The increased seeding density had negative effects on seedling quality indices,including the emergence of new tillers, the maintenance of tillers with more than three leaves,dry weight and N content of plants whereas showed positive effects on the LAI of seedling nursery,and the effects were more obvious than nitrogen treatments”
Claim · model-written summary
Increased seeding density had positive effects on the LAI of the seedling nursery.
- Taxon
- riceOryza sativae0
- Material
- Xieyou 107e2
- Treatment
- increased seeding densitye6
- Outcome
- the LAI of seedling nurserye6
- Direction
- increaseinferrede6
- Qualifier
- the effects were more obvious than nitrogen treatmentse6
- Setting
- Taoyuan town,Yongsheng county,Yunnan Provincee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling quality of rice”
e1“was conducted at Taoyuan town,Yongsheng county,Yunnan Province”
e2“using an indica hybrid rice,Xieyou 107 as material”
e6“The increased seeding density had negative effects on seedling quality indices,including the emergence of new tillers, the maintenance of tillers with more than three leaves,dry weight and N content of plants whereas showed positive effects on the LAI of seedling nursery,and the effects were more obvious than nitrogen treatments”
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