Ecological Energetics of the Diara Land Ecosystem and Its Management
作者:
HEMANTKUMAR VERMA,
期刊:
Energy Sources
(Taylor Available online 1997)
卷期:
Volume 19,
issue 3
页码: 219-231
ISSN:0090-8312
年代: 1997
DOI:10.1080/00908319708908845
出版商: Taylor & Francis Group
关键词: consumer;diara land;ecological efficiency;ecological energetics;producer
数据来源: Taylor
摘要:
Ecological energetics involve energy's relationship with the ecosystem. From the standpoint of energetics, it is necessary to express biomass in terms of calories, so that the relationship between the rate of energy flow and average standing biomass can be established. Net annual energy fixation by green plants on diara land at the natural field site I (wild vegetation) was 3,408·53 Kcal m-2y-1and at the mixed cultivated field site II (edible vegetation with wild species) was 19,714·3 Kcal m-2y-1. These values, measured on an area-weighted average basis, were 285·09 × 105KJ ha-1y-1at site I and 5,771·16 × 105KJ ha-1y-1at site II. The energy conserving efficiency was 0·13% at site I and 2·7% at site II. The ecological efficiency of the livestock community was 0·004%, and energy transfer efficiency was 0·14%. The allometric relationship between the biomass component (independent) and caloric content (dependent) was found to be highly significant with standing dead and total biomass at site I and with aboveground parts, standing dead, and total biomass at site II.
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