Abstract
Based on the water and soil cultivation experiments on rice and the root growth model of water spinach and lettuce,a model to describe the cycle and characteristics of the root growth of rice was established.Statistical significance of the model for 7 rice varieties was obtained.For instance,the model could predict the root length growth constant,the maximum root growth rate and length,as well as the time for their appearances.The water and soil cultivation experiments showed that all varieties retained a large root system at later stage of growth;no significant difference on root growth characteristics among the late rice varieties,except Teyou 3101;the variation coefficient of the maximum root growth rate among different species was 7.6%;and the time for the maximum root growth was about two months after sowing,suggesting an advantage of topdressing at this time for fertilization efficiency.The soil cultivation experiment showed that the root growth constant could be increased 57.2% by application of a balanced fertilization of nitrogen,phosphorus and potassium,as compared with no fertilization.The maximum root growth rate and root length were increased 61.0% and 65.4%,respectively,showing the apparent effect of the timed fertilization in promoting growth and increasing length of the roots for rice.
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Claims 10
Claim · model-written summary
A model described rice root growth cycles and characteristics with statistical significance across seven varieties.
- Taxon
- rice
Oryza sativae0 - Outcome
- Statistical significance of the modele0
- Value
- 7 rice varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a model to describe the cycle and characteristics of the root growth of rice was established.Statistical significance of the model for 7 rice varieties was obtained.”
Claim · model-written summary
The model could predict rice root growth constant, maximum growth rate and length, and their timing.
- Taxon
- riceOryza sativat0
- Outcome
- root length growth constant,the maximum root growth rate and lengthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the model could predict the root length growth constant,the maximum root growth rate and length,as well as the time for their appearances”
t0“root length and growth characteristics of rice”
Claim · model-written summary
All rice varieties retained a large root system at a later growth stage.
- Taxon
- riceOryza sativat0
- Organ / stage
- later stage of growthe0
- Outcome
- large root systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all varieties retained a large root system at later stage of growth”
t0“rice”
Claim · model-written summary
Late rice varieties except Teyou 3101 did not differ significantly in root growth characteristics.
- Taxon
- riceOryza sativae0
- Material
- Teyou 3101e0
- Outcome
- root growth characteristicse0
- Direction
- no significant differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant difference on root growth characteristics among the late rice varieties,except Teyou 3101”
Claim · model-written summary
The coefficient of variation in maximum root growth rate was 7.6% across species.
- Taxon
- riceOryza sativat0
- Outcome
- variation coefficient of the maximum root growth ratee0
- Value
- 7.6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the variation coefficient of the maximum root growth rate among different species was 7.6%”
t0“rice”
Claim · model-written summary
Maximum root growth occurred about two months after sowing.
- Taxon
- riceOryza sativat0
- Outcome
- time for the maximum root growthe0
- Value
- about two months after sowinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the time for the maximum root growth was about two months after sowing”
t0“rice”
Claim · model-written summary
Topdressing around maximum root growth was suggested to improve fertilization efficiency.
- Taxon
- riceOryza sativat0
- Outcome
- topdressing at this time for fertilization efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting an advantage of topdressing at this time for fertilization efficiency”
t0“rice”
Claim · model-written summary
Balanced nitrogen, phosphorus and potassium fertilization increased the rice root growth constant by 57.2% versus no fertilization.
- Taxon
- riceOryza sativat0
- Treatment
- balanced fertilization of nitrogen,phosphorus and potassiume0
- Outcome
- root growth constante0
- Direction
- increasede0
- Value
- 57.2%e0
- Comparator
- no fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root growth constant could be increased 57.2% by application of a balanced fertilization of nitrogen,phosphorus and potassium,as compared with no fertilization”
t0“rice”
Claim · model-written summary
Timed fertilization increased maximum rice root growth rate by 61.0%.
- Taxon
- riceOryza sativat0
- Treatment
- timed fertilizatione0
- Outcome
- maximum root growth ratee0
- Direction
- increasede0
- Value
- 61.0%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum root growth rate and root length were increased 61.0% and 65.4%,respectively,showing the apparent effect of the timed fertilization”
t0“rice”
Claim · model-written summary
Timed fertilization increased rice root length by 65.4%.
- Taxon
- riceOryza sativat0
- Treatment
- timed fertilizatione0
- Outcome
- root lengthe0
- Direction
- increasede0
- Value
- 65.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum root growth rate and root length were increased 61.0% and 65.4%,respectively,showing the apparent effect of the timed fertilization”
t0“rice”
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