摘要
本文探讨了奈曼旗沙漠化地区农业生态系统的能流效益,指出了该区农业生态系统能量总投入产出比为3.67;总产出能与商品能之比为12.72;总产出能与有机能之比为8.47;总产出能与机械能之比为13.22。并对该区11个农业子系统进行了综合评价。
The benefit of energy flux in the agroecosystem of the desertified area
in Naiman County, Inner Mongolia is discussed in this paper. It is pointed
out that in this agroecosystem the ratios of the total output energy to the
input energy, the commodity energy, the organic energy and the mechani-
cal energy are 3.67, 12.72, 8.47, and 13.22 respectively. Meanwhile, by
using comprehensive assess ment method eleven agricultural subecosystems are
evaluated, in this couse the weighted values are substituted with the par-
tial correlation coefficients of the judging factors, which have been proved
practical. The benefits of 11 agricultural sub-ecosystem are listed depend-
ing on their scores from the highest to the lowest as follows: 0.7957 for
maize; 0.5088 for sorghum; 0.3859 for soybean; 0.3580 for millet with no
irrigation; 0.3256 for wheat plus buckwheat, 0.2910 for mung bean;
0.2533 for wheat; 0.2363 for millet with irrigation; 0.2352 for broomcorn
millet; 0.2341 for buckwheat; and 0.0287 for watermelon. In addition, the
benefit ratios in the above sub-ecosystems are ranging from 142.02 to
219.98. The input commodity energy (mainly chemical fertilizer energy)
occupies about 28.9% the total input energy, while is higher than the
national mean value of 23%.
出处
《干旱区资源与环境》
CSCD
1992年第3期85-91,共7页
Journal of Arid Land Resources and Environment
关键词
农业生态系统
能流效益
综合评判
Agroecosystem
Benefit of Energy Flux
Comprehensive Assessment Method