摘要
在调查试验的基础上，运用能量分析的方法，对陕西省陇县跃先村畜牧业生态系统的能量流动及转化效率进行了分析，结果表明：（１）在该村生产条件下，畜牧业生态系统初级生产者对光能转化效率的顺序依次是，玉米＞苜蓿＞高梁＞野干草；（２）次级生产者家畜的饲料转化率的顺序是，奶牛＞猪＞奶山羊＞鸡＞役畜；（３）系统能量投入水平低，是制约饲料生产的限制性因素；（４）精饲料投入不足，役畜数量过大，是该系统能量转化效率低的主要原因。据此，作者认为，适当压缩粮食作物面积，扩大玉米和紫花苜蓿种植面积，发展以奶牛和奶山羊为主的草食家畜，增加饲料投入，推广科学养育技术，是提高该村畜牧业生产水平的重要措施。
Based on the data of experiment，analysised the state of energyflow in theanimal ecology． The results showed that， firstly，the conversion efficiency of the feedcrops from high to low was maize，Alfalfa，sorgo and Wildgrass；Secondiy，the conversionefficiency of domestic ai、imal from big to small was milk cow，swine，milk goat，egg henand work animal．Thirdly，the factor restrictting systemic production was short of energyinputed to plants and concentrat feed，In addition，the exess of work make the produc-tion efficiency low too。 It was important measure for improving animal production toreduce foodcrops，extending feed crops such as maize aidcommon Alfalfa， developingthe her bivorous ai1imal such as milk cow，milk goat and beef cattle，increaseing the ani-mal concentrate feed and popularizing the animal science and technique。
出处
《家畜生态》
1997年第2期1-6,9,共7页
Ecology of Domestic Animal
基金
陕西省重点推广课题
