摘要
笔者对宁南山区灌溉农业区已形成规模种植的三类立体复合种植模式和相应的4种作物单种通过设置田间试验进行了生产力的研究.研究表明,立体复合种植比各作物单种第一生产力提高22.3～100.3%,光、热、水资源时间效率提高20.4～53.5%,光能利用率提高5.2～22.6%,辅助能转换效益(产投比)增加21.4～32.2%,经济效益也大幅度提高.立体复合种植从土壤中摄取的养分虽明显增加,但有机质源增加更多.运用层次分析法对不同种植方式的效益进行了综合评价,结果表明,三类立体复合种植模式中,效益期望值以小麦/玉米最高.同时,分析了该区发展农作物立体复合种植的必要性和可能性,提出了三类模式各自的适宜推广区域.
Study on the productivity of three types of multiple-cropping ecosystems which have been Spread in a large scale in irrig-ation belt of Ningxia southern mountainous areas and that of four types of crop monoculture through establishing field trials shows that in comparison with the primary productivity of crop monoculture,that of the multiple-cropping system increases by 22.3 to 100.3 percent, time efficiency of natural resources including sunlight, heat and water increases by 20.4 to 53.5 percent and utilization ratio of sunlight energy by 5.2 to 22.6 percent; the converted effectiveness of supplementary energy (output ratio to input one) by 21.4 to 32.2 percent and also the economic benefit increases markedly. Not only does the crop nutrient content absorbed from the soil rises obviously, but also the soil organic resources inputed increase much more while adopting multiple-cropping ecosystem. Meanwhile, the different planting ecosystems have been assessed comprehensively for beneficial results by the Analysis Hierarchical Procedure and the expected beneficial value of wheat/corn planting system is the highest among these three types of multiple-cropping ecosystems. Not only does the article analyse the possibility and necessity of developing the multiple-croppiog ecosystem in southern mountainous areas but also put forward the suitable popularizing belt in the light of their different trait.
出处
《宁夏农林科技》
1993年第4期1-7,53,共7页
Journal of Ningxia Agriculture and Forestry Science and Technology
