论文部分内容阅读
在半干旱的伊盟达旗周围有井灌的条件，建立农业与林业复合的农用林生态经营体系具有高效、持续的经济效益。本文通过１０年来在试验区所进行的农林复合经营试验体系的建设表明（１）农用林生态系统中，林粮间作比纯粮单作净收益增加２０９０元／ｈｍ２·ａ，提高幅度达到４１．４％。（２）林粮间作农用林系统与纯林单造相比，其净收益增加５６０５．９元／ｈｍ２·ａ，提高了８．６３倍之多。（３）利用综合评判，农用林复合生态系统间作类型经济效益以林粮间作１．５ｍ×６ｍ密度型最佳，各种复合类型经济效益综合排序为：林粮间作１．５ｍ×６ｍ型＞林粮间作１ｍ×６ｍ型＞农林间作２ｍ×６ｍ型＞农林间作２ｍ×８ｍ型＞林草间作带式＞林草间作１．５ｍ×１０ｍ型＞纯粮单作（小麦）＞纯林单作。
In the semi-arid Yimengda flag around well irrigation conditions, the establishment of agriculture and forestry complex agroforestry ecosystem management system with efficient and sustained economic benefits. Through the establishment of experimental system of agroforestry in the pilot area over the past 10 years, this paper shows that (1) in the agroforestry ecosystem, the net benefit of intercropping of forest and grain crops is 2090 yuan / hm2 · a, an increase of 41%. 4%. (2) Compared with the net production of pure forest, the inter-crop forest agricultural forest system increased its net income by 5605.9 yuan / hm2 · a, an increase of 8.63 times. (3) According to the comprehensive evaluation, the economic efficiency of intercropping agroforestry ecosystem is the best among 1.5m × 6m density forest-grain crops. The comprehensive economic benefits of each compound type are listed as follows: intercropping 1.5m × 6m> Forest intercropping 1m × 6m type> Agriculture and forestry intercropping 2m × 6m type> Agriculture and forestry intercropping 2m × 8m type> Intercropping with forest and grass> 1.5m × 10m type intercropping for forest and grass> Pure grain single cropping (wheat)> Pure forest monoculture .