Abstract
The present paper deals with the influence of the intensity and its persistence of nitrogen supply to the formation and development of the organs of rice plant and also with the resulting physiological feature of these influences. Pot culture experiments with paddy soils were conducted in open field. Organic manure and ammonium sulphate were applied at different stages of growth, i.e. tillering, internode elongating and panicle differentiating stage. The results are summarized as follows:1. Experiments revealed that various organs of rice plant gave different responses to the status of nitrogen supply, and to the same organs, their responses of nitrogen varies at different stages of growth. At the tillering stage, a strongly intensified and less persistent supply of nitrogen, as in the case of ammonium sulphate, promoted the assimilation of dry matter in leaf blade, and consequently enlarged the leaf areas. Such an effect on the leaf blade, however, terminated after the internode elongating stage, and more accumulation of dry matter was found in the stems. Top dressing of manures, pertinently after the internode elongating stage, gave a moderate but persistent supply of nitrogen at that time and resulted the formation of large and healthy ears. Under theexperimental condition, such treatments have been proved favourable to the growth and yield of rice.2. The influence on the growth of the organs, as resulted by changing the status of nitrogen supply, is mainly induced by the rate of accumulation and translocation of nitrogen in plant. A strongly intensified, but less persistent, nitrogen supply accelerates the rate of translocation of nitrogenous materials, while a less intensified but rather persistent supply of nitrogen retains more nitrogenous materials in leaf blade.3. It is evidently that the demand of nitrogen supplying status of rice plant differs at different growing stages. Under the experimental condition, high yields of rice crops were attained by a slower but persistent rate of nitrogen suppy in the tillering stage; a faster but less persistent rate in the internode elongating stage and also a moderate but persistent rate in the penicle differentiating stage. Since property of soil nitrogen varies in different soil type, the regulation of nitrogen supplying status by fertilization should be different in cach cases.
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Claims 11
Claim · model-written summary
Rice organs responded differently to nitrogen supply, and responses varied by growth stage.
- Taxon
- rice plant
Oryza sativae0 - Organ / stage
- various organse0
- Outcome
- different responsese0
- Qualifier
- different stages of growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“various organs of rice plant gave different responses to the status of nitrogen supply, and to the same organs, their responses of nitrogen varies at different stages of growth”
Claim · model-written summary
Strong, less persistent nitrogen supply at tillering promoted leaf blade dry matter assimilation and enlarged leaf area.
- Taxon
- RICE PLANTOryza sativat0
- Organ / stage
- tillering stagee0
- Treatment
- a strongly intensified and less persistent supply of nitrogene0
- Outcome
- assimilation of dry matter in leaf bladee0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the tillering stage, a strongly intensified and less persistent supply of nitrogen, as in the case of ammonium sulphate, promoted the assimilation of dry matter in leaf blade, and consequently enlarged the leaf areas”
t0“RICE PLANT”
Claim · model-written summary
After internode elongation, more dry matter accumulated in rice stems than leaf blades.
- Taxon
- RICE PLANTOryza sativat0
- Organ / stage
- stemse0
- Outcome
- accumulation of dry mattere0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such an effect on the leaf blade, however, terminated after the internode elongating stage, and more accumulation of dry matter was found in the stems”
t0“RICE PLANT”
Claim · model-written summary
Manure top dressing after internode elongation produced large and healthy rice ears.
- Taxon
- RICE PLANTOryza sativat0
- Organ / stage
- internode elongating stagee0
- Treatment
- Top dressing of manurese0
- Outcome
- formation of large and healthy earse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top dressing of manures, pertinently after the internode elongating stage, gave a moderate but persistent supply of nitrogen at that time and resulted the formation of large and healthy ears”
t0“RICE PLANT”
Claim · model-written summary
The stage-specific nitrogen treatments favored rice growth and yield under the experimental conditions.
- Taxon
- riceOryza sativae0
- Treatment
- such treatmentse0
- Outcome
- growth and yielde0
- Direction
- favourablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under theexperimental condition, such treatments have been proved favourable to the growth and yield of rice”
Claim · model-written summary
Strong but less persistent nitrogen supply accelerated nitrogenous material translocation in rice.
- Taxon
- RICE PLANTOryza sativat0
- Treatment
- A strongly intensified, but less persistent, nitrogen supplye0
- Outcome
- rate of translocation of nitrogenous materialse0
- Direction
- acceleratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A strongly intensified, but less persistent, nitrogen supply accelerates the rate of translocation of nitrogenous materials”
t0“RICE PLANT”
Claim · model-written summary
Less intense but persistent nitrogen supply retained more nitrogenous material in rice leaf blades.
- Taxon
- RICE PLANTOryza sativat0
- Treatment
- a less intensified but rather persistent supply of nitrogene0
- Outcome
- nitrogenous materials in leaf bladee0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a less intensified but rather persistent supply of nitrogen retains more nitrogenous materials in leaf blade”
t0“RICE PLANT”
Claim · model-written summary
A slower persistent nitrogen supply at tillering was associated with high rice yields.
- Taxon
- rice cropsOryza sativae0
- Organ / stage
- tillering stagee0
- Treatment
- a slower but persistent rate of nitrogen suppye0
- Outcome
- high yieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high yields of rice crops were attained by a slower but persistent rate of nitrogen suppy in the tillering stage”
Claim · model-written summary
A faster less persistent nitrogen supply at internode elongation was associated with high rice yields.
- Taxon
- rice cropsOryza sativae1
- Organ / stage
- internode elongating stagee0
- Treatment
- a faster but less persistent ratee0
- Outcome
- high yieldse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a faster but less persistent rate in the internode elongating stage”
e1“high yields of rice crops were attained by a slower but persistent rate of nitrogen suppy in the tillering stage”
Claim · model-written summary
A moderate persistent nitrogen supply at panicle differentiation was associated with high rice yields.
- Taxon
- rice cropsOryza sativae1
- Organ / stage
- penicle differentiating stagee0
- Treatment
- a moderate but persistent ratee0
- Outcome
- high yieldse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a moderate but persistent rate in the penicle differentiating stage”
e1“high yields of rice crops were attained by a slower but persistent rate of nitrogen suppy in the tillering stage”
Claim · model-written summary
Fertilization should regulate nitrogen supply differently for different soil types.
- Taxon
- RICE PLANTOryza sativat0
- Outcome
- regulation of nitrogen supplying status by fertilizatione0
- Qualifier
- different soil typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Since property of soil nitrogen varies in different soil type, the regulation of nitrogen supplying status by fertilization should be different in cach cases”
t0“RICE PLANT”
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See all 511 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.