摘要
通过对宁夏固原县上黄村农业生态系统能量分析表明:能量投入是稳定增加的,而能量产出及产投比则具有波动性,但总的趋势是增加的。农业生态系统能量产投比波动在0.44～1.93之间,平均值为1.36。由于化肥投入的增加,致使有机肥投入也在增加。人工辅助能(主要是无机肥)的增加,无论在丰水年、还是平水年,都具有良好的生态、经济和社会效益,同时上黄村新的农业生态系统具有较强的抗灾能力。
The energy analysis in the agricultural ecosystem indicates that energy input is increased stablly, Althong both ra-tion of energe output and output input are fluctuated,they trend towards increase in total. The ratio of energy outputto input is changed from 0. 44 to 1. 93 with an average of 1. 36. Input of organic manure is increased with the input ofinorganic fertilizer. Increase of supplementary energy mainly chemical fertilizer produces a soundably ecological andSocial benefit regardless of in the year with plenty of rainfall of with an averagy amount of preciptation. Meanwhile,the agricultural ecosystem in Shanghuang village possess strong capabity to resist natural calamities
出处
《水土保持通报》
CSCD
北大核心
1993年第2期33-37,共5页
Bulletin of Soil and Water Conservation
关键词
农业
生态系统
能量
Shanghuang village
agricultaral ecosystem
energy
