Abstract
Intraspecific competition for weight growth was analysed in constituent Abies trees within a 20-year-old A. Mariesii and A. Veitchii mixed stand of Forest Unit V on Mt. Shimagare.1. Annual dry matter increments in needles, branches, trunk and roots of each of trees, which were classified into the dominant, codominant, intermediate and suppressed, were estimated by the mathematical analyses of tree measures. Annual net production, the sum total of these increments per tree, increased with rise in gradation of the tree weight class. Also the relative productivity (net production/tree weight), the net assimilation rate and the relative growth rate indicated the same trend.2. The inner and outer factors concerned with the dry matter production were discussed. The somewhat high proportion of needles for the total dry weight and the high light intensity received by needles were responsible for the high productivity in the dominant class.3. Annual gross production per tree was calculated in each tree weight class by combining photosynthetic activity and light factor received by each canopy, with correction by seasonal temperature changes. Annual respiration loss was also calculated.4. The difference between the annual gross production and the annual respiration loss gave the net production per tree. This value was in accord with the annual net production determined by the analyses of tree measures, in each class. The accordance may prove the soundness of the calculations.5. The suppressed tree made relatively small gross production under weak illumination, but high respiration loss comparing with its dry weight. So the growth rate of the suppressed became very low. The reverse was seen in the dominant. Such difference in matter production between the dominant and other tree classes should cause marked growth difference with the lapse of time.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Annual net production per tree increased with tree weight class in Abies.
- Treatment
- rise in gradation of the tree weight classe1
- Outcome
- Annual net productione1
- Direction
- increasede1
AbiesOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e1“Annual net production, the sum total of these increments per tree, increased with rise in gradation of the tree weight class”
Claim · model-written summary
Relative productivity, net assimilation rate and relative growth rate showed the same increasing trend with tree weight class in Abies.
- Treatment
- tree weighte2
- Outcome
- relative productivity (net production/tree weight), the net assimilation rate and the relative growth ratee2
- Direction
- increaseinferrede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e2“Also the relative productivity (net production/tree weight), the net assimilation rate and the relative growth rate indicated the same trend”
Claim · model-written summary
High productivity of dominant Abies trees was attributed to a high needle proportion and high light intensity received by needles.
- Organ / stage
- needlese3
- Outcome
- high productivity in the dominant classe3
- Qualifier
- high light intensity received by needlese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e3“The somewhat high proportion of needles for the total dry weight and the high light intensity received by needles were responsible for the high productivity in the dominant class”
Claim · model-written summary
Suppressed Abies trees made relatively small gross production under weak illumination.
- Material
- suppressed treee4
- Outcome
- gross productione4
- Direction
- decreaseinferrede4
- Setting
- weak illuminatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e4“The suppressed tree made relatively small gross production under weak illumination, but high respiration loss comparing with its dry weight”
Claim · model-written summary
Suppressed Abies trees had high respiration loss relative to their dry weight.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e4“The suppressed tree made relatively small gross production under weak illumination, but high respiration loss comparing with its dry weight”
Claim · model-written summary
The growth rate of suppressed Abies trees became very low.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e5“So the growth rate of the suppressed became very low”
Claim · model-written summary
Calculated net production per tree agreed with the net production determined from tree measures.
- Outcome
- annual net productione6
- Comparator
- the annual net production determined by the analyses of tree measurese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e6“This value was in accord with the annual net production determined by the analyses of tree measures”
Claim · model-written summary
Annual gross production per tree was calculated for each tree weight class in Abies.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intraspecific competition for weight growth was analysed in constituent Abies trees”
e7“Annual gross production per tree was calculated in each tree weight class”