Abstract
Decreased accumulation of elements, particularly of nitrogen, had in dense stand a negative influence on the plants, in spite of the supply of fresh solution and the control of the concentration of nutrients in the pots. The fresh weight and the dry matter of one plant were reduced substantially with rising stand density (from 5 to 10, 20, 40 and 80 plants per 450 sq. cm); the RGR value, the relative absorption rate IM, the content of all tested elements calculated per one plant, the chlorophyll content in the overground parts of one plant, and the distribution index decrease. Qualitatively the same influence is caused by deficiency of nutrients. Plant dying and self-thinning of the culture occurred in denser stand in the course of cultivation. The root-weight ratio rose with stand densification, particularly at the end of the experiment. The net assimilation rate (NAR) related to chlorophyll dropped with stand density; NAR at density “80” rose slightly from the 22nd day of cultivation and did so at further lower densities. Almost all NAR values lie over the control value at the last measurement. The chlorophyll content in mg g−1 dry matter of the overground parts rose with stand density to density “40” (41% more than at density “5”); afterwards it dropped. The accumulation (in mg g−1 d.m.) of phosphorus ions was higher in the plants from dense cultures compared with density “5”, particularly in the roots. The accumulation of potassium was near to the control value (“5”), while that of nitrogen was lower. The utilization quotients of phosphorus and potassium in denser stands were the same or negligibly lower than at density “5”. They were a little higher in nitrogen than in the controls. Also the ratio RGR/IM was a little higher than in denser stands. The root-weight ratio, the accumulation of elements in mg g−1 d.m., the chlorophyll content in mg g−1 d.m., NARch, the utilization quotient, and the ratio RGR/IM differed qualitatively by the densification of the culture (with complete mineral nutrition) from the influence of element deficiency (at the same stand density).
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Claims 9
Claim · model-written summary
Per plant fresh and dry weight fell as density rose.
- Taxon
- Pea
Lathyrus oleraceust0 - Outcome
- fresh weight and the dry matter of one plante0
- Direction
- reducede0
- Setting
- stand densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fresh weight and the dry matter of one plant were reduced substantially with rising stand density (from 5 to 10, 20, 40 and 80 plants per 450 sq. cm)”
t0“Pea”
Claim · model-written summary
RGR, absorption, element content, chlorophyll content and distribution index decreased with density.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- RGR valuee0
- Direction
- decreasee0
- Setting
- seed densityt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the RGR value, the relative absorption rate IM, the content of all tested elements calculated per one plant, the chlorophyll content in the overground parts of one plant, and the distribution index decrease”
t0“Pea growth and ion accumulation at varying seed density”
Claim · model-written summary
Plant death and self thinning occurred in denser stands.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- Plant dying and self-thinninge0
- Setting
- denser stande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant dying and self-thinning of the culture occurred in denser stand in the course of cultivation”
t0“Pea”
Claim · model-written summary
Root-weight ratio increased with density.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- root-weight ratioe0
- Direction
- rosee0
- Setting
- stand densificatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root-weight ratio rose with stand densification, particularly at the end of the experiment”
t0“Pea”
Claim · model-written summary
Chlorophyll related net assimilation rate decreased with density.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- net assimilation rate (NAR) related to chlorophylle0
- Direction
- droppede0
- Setting
- stand densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The net assimilation rate (NAR) related to chlorophyll dropped with stand density”
t0“Pea”
Claim · model-written summary
Chlorophyll content increased to density 40 and then fell.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- chlorophyll contente0
- Direction
- rosee0
- Value
- 41%e0
- Setting
- stand densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chlorophyll content in mg g−1 dry matter of the overground parts rose with stand density to density “40” (41% more than at density “5”); afterwards it dropped”
t0“Pea”
Claim · model-written summary
Phosphorus ion accumulation was higher in dense cultures.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- accumulation (in mg g−1 d.m.) of phosphorus ionse0
- Direction
- highere0
- Comparator
- density “5”e0
- Setting
- dense culturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation (in mg g−1 d.m.) of phosphorus ions was higher in the plants from dense cultures compared with density “5”, particularly in the roots”
t0“Pea”
Claim · model-written summary
Potassium accumulation was near the control value.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- accumulation of potassiume0
- Direction
- near to the control valuee0
- Comparator
- control value (“5”)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation of potassium was near to the control value (“5”), while that of nitrogen was lower”
t0“Pea”
Claim · model-written summary
Nitrogen accumulation was lower.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- nitrogene0
- Direction
- lowere0
- Comparator
- control value (“5”)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation of potassium was near to the control value (“5”), while that of nitrogen was lower”
t0“Pea”