Abstract
Combining 6 different temperature conditions (2 different air-temperatures × 3 different water-temperatures) with 6 different fertilizing conditions (3 different levels of fertilizer × 2 different fertilizing soil depths) as shown in Table 1, the authors set up 36 treatments and grew the rice seedlings for 30 days and examined the temperature and fertilizing effects on the growth and characteristics of seedlings. The results obtained can be summarized as follows, 1. The plant age (expressed by the number of leaves on the main stem) is much influenced by the water-temperature, and the higher the temperature is the more the plant age advances but the plant age is also influenced to some extent by the fertilizing conditions such as the amount of nitrogen. 2. The plant height, the weight of top dry-matter and foot dry-matter and the ratio of top dry-matter to the plant height (top/plant height ratio) increase all with the increasing amount of nitrogen as well as the increasing concentration of nitrogen in soil under low air and water- temperatures, while as the temperature raised the ill-effects of large amount of nitrogen on the growth of seedlings begin to appear, and as a result of it, under high temperature conditions it is necessary to decrease the amount of nitrogen as well as the concentration of nitrogen in soil for the favourable growth of rice seedlings. 3. The nitrogen content in rice seedlings is much more influenced by the fertilizing conditions than by temperature conditions, and the nitrogen content is almost parallel to the amount of nitrogen applied. 4. The carbohydrate (total sugar-Estarch) content in rice seedlings is very high in both the highest and the lowest temperature condition in the present experiment and it is very low at the treatment of 26°C in water-temperarature, and it decreases with the increasing amount of nitrogen applied, except for the treatrnent of 36°C in water-temperature. 5. The ratio of carbohydrate to nitrogen (C/N ratio) in rice seedlings is much more influenced by fertilizing conditions than by temperature conditions, and the ratio decreases progressively with the increasing amount of nitrogen applied at any temperature condition.
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Claims 11
Claim · model-written summary
Higher water temperature advanced rice seedling leaf age.
- Taxon
- rice seedlings
Oryza sativat0 - Treatment
- temperaturee0
- Outcome
- plant agee0
- Direction
- advancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the higher the temperature is the more the plant age advances”
t0“rice seedlings”
Claim · model-written summary
Fertilizing conditions, including nitrogen amount, also influenced rice seedling age.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- the fertilizing conditions such as the amount of nitrogene0
- Outcome
- plant agee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plant age is also influenced to some extent by the fertilizing conditions such as the amount of nitrogen.”
t0“rice seedlings”
Claim · model-written summary
At low air and water temperatures, greater nitrogen amount and concentration increased seedling height and dry matter measures.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- increasing amount of nitrogene0
- Outcome
- plant height, the weight of top dry-matter and foot dry-mattere0
- Direction
- increasee0
- Qualifier
- under low air and water- temperaturese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plant height, the weight of top dry-matter and foot dry-matter and the ratio of top dry-matter to the plant height (top/plant height ratio) increase all with the increasing amount of nitrogen as well as the increasing concentration of nitrogen in soil under low air and water- temperatures”
t0“rice seedlings”
Claim · model-written summary
At high temperatures, large nitrogen amounts adversely affected seedling growth.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- large amount of nitrogene0
- Outcome
- growth of seedlingse0
- Direction
- ill-effectse0
- Qualifier
- as the temperature raisede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as the temperature raised the ill-effects of large amount of nitrogen on the growth of seedlings begin to appear”
t0“rice seedlings”
Claim · model-written summary
Authors recommend reducing nitrogen amount and soil concentration under high temperature for favorable seedling growth.
- Taxon
- rice seedlingsOryza sativae0
- Outcome
- decrease the amount of nitrogen as well as the concentration of nitrogen in soile0
- Qualifier
- under high temperature conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high temperature conditions it is necessary to decrease the amount of nitrogen as well as the concentration of nitrogen in soil for the favourable growth of rice seedlings.”
Claim · model-written summary
Seedling nitrogen content tracked nitrogen fertilizer amount and responded more to fertilization than temperature.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- amount of nitrogen appliede0
- Outcome
- nitrogen contente0
- Direction
- almost parallele0
- Comparator
- temperature conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen content in rice seedlings is much more influenced by the fertilizing conditions than by temperature conditions, and the nitrogen content is almost parallel to the amount of nitrogen applied.”
Claim · model-written summary
Seedling carbohydrate content was high at both extreme temperatures.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- highest and the lowest temperature conditione0
- Outcome
- carbohydrate (total sugar-Estarch) contente0
- Direction
- very highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The carbohydrate (total sugar-Estarch) content in rice seedlings is very high in both the highest and the lowest temperature condition in the present experiment”
Claim · model-written summary
Seedling carbohydrate content was low with water temperature of 26°C.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- 26°C in water-temperaraturee0
- Outcome
- carbohydrate (total sugar-Estarch) contente1
- Direction
- very lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is very low at the treatment of 26°C in water-temperarature”
t0“rice seedlings”
e1“The carbohydrate (total sugar-Estarch) content in rice seedlings is very high in both the highest and the lowest temperature condition in the present experiment”
Claim · model-written summary
Carbohydrate content declined with increasing nitrogen except at 36°C water temperature.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- increasing amount of nitrogen appliede0
- Outcome
- carbohydrate (total sugar-Estarch) contente1
- Direction
- decreasese0
- Qualifier
- except for the treatrnent of 36°C in water-temperaturee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it decreases with the increasing amount of nitrogen applied, except for the treatrnent of 36°C in water-temperature.”
t0“rice seedlings”
e1“The carbohydrate (total sugar-Estarch) content in rice seedlings is very high in both the highest and the lowest temperature condition in the present experiment”
Claim · model-written summary
The seedling carbohydrate to nitrogen ratio was more influenced by fertilization than temperature.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- fertilizing conditionse0
- Outcome
- ratio of carbohydrate to nitrogen (C/N ratio)e0
- Comparator
- temperature conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of carbohydrate to nitrogen (C/N ratio) in rice seedlings is much more influenced by fertilizing conditions than by temperature conditions”
Claim · model-written summary
The seedling C/N ratio decreased progressively as nitrogen application rose at any temperature.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- increasing amount of nitrogen appliede0
- Outcome
- ratioe0
- Direction
- decreases progressivelye0
- Qualifier
- at any temperature conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ratio decreases progressively with the increasing amount of nitrogen applied at any temperature condition.”
t0“rice seedlings”
The same questions in other papers
nitrogen · growth · Oryza sativa (rice)Positive and negative results
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