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核心期刊论文目录 |
江南丘岗复合农业生态系统雨水资源化及其调控研究 |
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出 版 社:农业现代化研究 |
发表时间:2008年 06期 |
台 站:
桃源农业生态试验站
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作 者:谢小立; 尹春梅; 宋颖帕; 陈安磊; |
点 击 率:4860 |
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关 键 字:雨水资源; 利用限制; 调控策略; 复合农业生态模式; |
摘 要:通过对湘北红壤丘岗区复合农业生态系统水环境要素10年定位观测研究,探讨了我国江南丘岗复合农业生态系统雨水资源化需求分布与开发状况:该区域雨水资源丰富,可利用潜力大,但雨水有季节性富余和亏缺,尤其丘岗复合农业生态系统晚稻容易遭遇伏旱(缺水281.7mm)。丘岗坡地降雨径流的时间集中(4~7月)与高产径流量(平均18.3×104m3/km2.a)为区域集雨利用提供可靠来源。但由于该区域所属红壤土质,土壤持水能力强,有效含水量低,集水调蓄设施局限性,以及坡地的混乱开发而导致雨水资源浪费大、利用率低,加剧了农业用水矛盾。文章为区域雨水资源的调控提出了建设性的调控管理方略:一是通过调整坡地利用结构与布局,即人工林占30%,人工草地占15%,果药茶园占30%,耕地占20%;二是加强水体工程设施建设,增加现有水库容量,使区域雨水资源利用更为科学合理;三是推广高效灌溉和覆盖技术,提高水资源利用率。 |
关 键 字(英文):rainwater resources; restrictions of utilization; control strategy; compound agro-ecological model; |
摘 要(英文):Based on a 10 years positioning observation on the distribution of rainwater resources, this article is written to discuss the needs and developments in red soil hilly agro-ecosystem. The results show that: rainwater resources are rich in this region, but It’s seasonal surplus and deficit. Especially there would be a summer drought during later rice (short- age 281.7mm). Runoff of rainfalls is concentrated during April to July in slope-hilly region, and a great quantity of runoff (an average of 18.3 ×104m3/... |
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