宁夏南部半干旱山区生态农业建设优化模式的建立

Ecological Agriculture Optimization Pattern in Semi-arid Area of the South Ningxia

采用多目标线性规划原理,对本地区生态农业建设模式进行优化,得出:示范区人均收入达1 643元,可利用饲草总产量9 538 965 kg,人均占有粮食500 kg。土地侵蚀模数由2000年的7 800 t/km2降低到2 120 t/km2。农林牧用地比例调整为3∶3∶4。通过综合治理措施,随着森林覆盖度不断扩大,林龄增大,林木生长旺盛,示范区农林牧副结构更加合理,生态经济社会效益更加突出。生态环境进一步恢复,示范区必将走向资源、环境、人口、经济、社会协调持续发展的道路。

The ecological agriculture model was optimized Per capita income of the demonstration district reaches 1 by using muhi-goal linear program principle. The result is as follows. 643 yuan, the total output of usable forage is 9 538 965 kg, per capita grain reaches 500 kg. The erosive modulus from 7 800 t/km^2 in 2000 reduced to 2 120 t/km^2. The ratio of agriculture, forest and animal husbandry land use is 3：3：4. Through comprehensive controlling measures, as the forest coverage is constantly increased, forest age increases, and woods are growing vigorously, the structure of agriculture, forest and animal husbandry is more reasonable, the benefits of ecology, economy and society are becoming more outstanding. The ecological environment is further resumed, the demonstration district must moves towards the road of harmonious development of resources and environment, population and economic, and society.