摘要
在固原半干旱灌溉农田已形成种植规模的3类间作套种模式和相应的4种作物单种,通过设置田间试验,进行综合效益研究表明,间作套种比各自作物单种平均第一性生产力提高22.28％～100.7％;光、热、水气候资源时间效率提高20.44％～53.48％,光能利用率提高5.22％～22.64％,辅助能转换效益增加21.42％～32.21％;经济效益亦大幅度提高。间作套种系统从土壤中摄取的养分虽明显增加,但有机质源却增加更多。运用层次分析法(AHP)对不同种植方式效益进行了综合评价,3类间作套种模式中,效益期望值以小麦/玉米最高。此处还分析了该区发展作物间作套种的必要性和可行性,提出了3类模式各自的适宜推广区域。
The integrated benefits of three intercropping models and other four cor-responding monoculture systems with a cultivation scale in irrigated farmlands inGuyuan semi-arid were studied through the field experinents. The results show that theincremental production (the first mean productivity) is raised by 22.28～100. 27%through the intercropping method as compared with the crop monoculture, whilst thetime effectiveness of climate resources involving sunlight. water and heat is raised by 20.44%～53. 48% the utilization, rate of light energy increased by 5.22%～22.64% theconverted benefit from the supplementary energy increases by 21.42%～32.21%. The e-conomic benefit is increased by a wide margin. The crop intercropping obtains more nu-trients from soils: whilst soil organic matter increases much more. Through the analysisof Hierarchical procedure Method (AHP), the integrated evaluation on different cultiva-tion benefits was made, resulting in the expected benefit value being highest in wheat/maize. The present paper not only analyses the necessity and feasibility in developing theintercropping in the area but also suggests the suitable belts for extension of three mod-els.
出处
《干旱地区农业研究》
CSCD
北大核心
1993年第4期5-12,共8页
Agricultural Research in the Arid Areas
关键词
干旱区
灌溉
间作套作
Guyuan semi-arid area
irrigated farmland
intercropping
integrated benefit
