Abstract
강원도 평창군 일대에서 화전 후 묵밭의 식생 천이에 따른 식물량, 순 일차 생산성 및 P/B 비의 변화를 조사하였다. 초본의 지상부 식물량은 5년차 묵밭에서 3.8 ton/ha로 가장 많았다. 낙엽 건중량은 50년차 묵밭까지 증가한 다음 감소하는 포물선형 변화를 나타내었다. 천이가 진행됨에 따라 흉고 단면적은 로그 함수적으로 증가하는 경향을 나타내었다. 교목의 목본 수는 15년차 묵밭까지 빠르게 증가하다가 경과 년 수에 따라 자가 솎음질 과정을 거쳐 감소하는 경향이었다. 80년차 묵밭에서 DBH 등급에 따른 목본의 분포는 역 J 자형을 나타내었고, 우점종은 신갈나무이었다. 식물 현조량은 천이 초기와 후기 단계에서 완만한 증가를 나타내었고, 중기 단계인 $10{\sim}50$년차 묵밭에서 빠르게 증가하였다. 5, 10, 20, 50 및 80년차 묵밭의 식물 현존량은 각각 5, 14, 75, 251 및 373 ton/ha로 추정되었다. 연간 순 생산성은 초기 35년간 점진적인 증가 후 감소하여 점차 안정화하는 경향을 나타내었다. 연간 순 일차 생산성의 증가 속도는 천이 중기 단계 보다 초기 단계에서 빠르게 증가하였다. 5, 10, 20, 35, 50 및 80년차 묵밭의 순 일차 생산성은 각각 8.6, 9.3, 12.9, 15.1, 13.7 및 3.6 ton/ha/yr이었다. P/B 비율은 천이가 진행됨에 따라 지수 함수적으로 감소하는 것으로 추정되었다. 5, 10, 20, 50 및 80년차 묵밭에서 추정된 P/B 비율은 각각 0.60, 0.39, 0.19, 0.06 및 0.01이었다. 이러한 결과는 Odum(1969)이 제시한 삼림천이 과정의 생물 에너지론과 잘 부합하였다. Changes of the biomass, net primary productivity and P/B ratio during abandoned field succession after shifting cultivation were investigated in Pyoungchang, Gangwon-Do, Korea. Aboveground standing biomass of herb species showed the maximum value (3.8 ton/ha) in the 5 year old-field, and decreased thereafter. Litter dry weight was depicted as a parabola form showing the gradual increment during the first 50 years and slight decrease thereafter. Basal area tended to increase logarithmically during abandoned field succession. Tree density showed the gradual increment during the first 15 years and decreased thereafter by the self-thinning process. In the later successional stage (80 years old-field), the shoot density distribution of the tree species by DBH class showed the reverse J shaped curve and Quercus mongolica dominated. Total standing biomass increased slowly in the earlier successional stages and later successional stages, and increased rapidly during the mid-successional stages ($10{\sim}50$ years old-field). Total standing biomass in the 5, 10, 20, 50 and 80 years old-fields were estimated 5, 14, 75, 251 and 373 ton/ha, respectively. Annual net primary productivity were depicted as a parabola form showing the gradual increment during the first 35 years and declined thereafter. The increment rates of the annual net primary productivity in the earlier successional stages showed the higher value than mid-successional stages. The annual net primary productivities in the 5, 10, 20, 35, 50 and 80 years old-field were estimated 8.6, 9.3, 12.9, 15.1, 13.7 and 3.6 ton/ha/yr, respectively. The estimated P/B ratio tended to decrease exponentially during abandoned field succession. The estimated P/B ratio in the 5, 10, 20, 50 and 80 years old-field were 0.60, 0.39, 0.19, 0.06 and 0.01, respectively. These results were fairly in accordance with the bioenergetics model during the forest succession projected by Odum(1969).
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 9
Claim · model-written summary
Herb biomass peaked at five years.
Verbatim
e0“Aboveground standing biomass of herb species showed the maximum value (3.8 ton/ha) in the 5 year old-field, and decreased thereafter.”
Claim · model-written summary
Litter dry mass rose for fifty years then declined.
Not reportedTaxon
Verbatim
e0“Litter dry weight was depicted as a parabola form showing the gradual increment during the first 50 years and slight decrease thereafter.”
Claim · model-written summary
Basal area rose logarithmically through succession.
Not reportedTaxon
Verbatim
e0“Basal area tended to increase logarithmically during abandoned field succession.”
Claim · model-written summary
Tree density rose for fifteen years then fell with self thinning.
Not reportedTaxon
Verbatim
e0“Tree density showed the gradual increment during the first 15 years and decreased thereafter by the self-thinning process.”
Claim · model-written summary
At eighty years tree shoot density formed a reverse J curve and Quercus mongolica dominated.
- Taxon
- Quercus mongolica
_in_December_2009.jpg?width=60)
Quercus mongolicae0 - Outcome
- shoot density distribution of the tree species by DBH classe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_in_December_2009.jpg?width=500)
Verbatim
e0“In the later successional stage (80 years old-field), the shoot density distribution of the tree species by DBH class showed the reverse J shaped curve and Quercus mongolica dominated.”
Claim · model-written summary
Standing biomass rose fastest in mid succession.
Not reportedTaxon
Verbatim
e0“Total standing biomass increased slowly in the earlier successional stages and later successional stages, and increased rapidly during the mid-successional stages ($10{\sim}50$ years old-field).”
Claim · model-written summary
Annual net productivity rose for thirty five years and then declined.
Not reportedTaxon
Verbatim
e0“Annual net primary productivity were depicted as a parabola form showing the gradual increment during the first 35 years and declined thereafter.”
Claim · model-written summary
Early succession had faster productivity gains than middle succession.
Not reportedTaxon
Verbatim
e0“The increment rates of the annual net primary productivity in the earlier successional stages showed the higher value than mid-successional stages.”
Claim · model-written summary
The productivity to biomass ratio declined exponentially.
Not reportedTaxon
Verbatim
e0“The estimated P/B ratio tended to decrease exponentially during abandoned field succession.”