宁南山区旱地苜蓿垄沟集水种植生物群体生长特征及其水分利用效率  

Growth Characteristics and Water Use Efficiency of Biotic Colony Under Catchment and Furrow Planting Technique of Medicago Sativa in Southern Ningxia Mountain Region

作　　者：李永平[1] 贾志宽[2] 刘世新[1] 韩青芳[2] 常克勤[1] 上官周平[2] 

机构地区：[1]固原市农业科学研究所,宁夏固原756000 [2]西北农林科技大学干旱半干旱研究中心

出　　处：《水土保持研究》2006年第5期199-201,204,共4页Research of Soil and Water Conservation

基　　金：农业部"948"项目(20012372);农业部农业结构调整重大技术研究专题项目;宁夏科技攻关项目(2001-19-07);中国科学院西部之光人才培养计划项目

摘　　要：皆对干旱半干旱旱作农业区降水资源严重短期的黄土丘陵地区实行退耕还草后,以旱地苜蓿草田生物产量实现高效节水增产为目的,以径流农业原理与生产紧密结合,通过旱作农田采用垄沟微集水节水增产种植技术,选择不同垄沟比种植带型,构件沟垄相间的垄面产流区和沟内带状微集水种植区,使牧草作物在全年生长期对有限降雨量实行时间与空间的有效富集,其产生水分叠加效应,对其草田宏观水分生态循环及其提高抗旱调控能力相应水分参数进行了系统研究。提高草田水分生态系统目标性调控能力,并总结出与之配套垄沟集雨种植带型,从而大幅度的提高了旱地苜蓿对水分的满足率和水分生产效率。Macroscopical water ecology cycling and the water parameters of increasing drought resistance of Medicago sativa were studied in arid and semi-arid agriculture regions. After conversion from farmland to grassland in arid and semi-arid agriculture regions of hilly loess regions, the authors aimed to achieve highly effective saving water and enhance yield of Medicago sativa, combined the theory of catchment agriculture with production, then through micro-rainwater catchment and furrow planting technique in rainfed cropland, selected the type of different ratio of ridge and ditch, shaped runoff region of alternating ditch with ridge and zonal region of micro-rainwater catchment , and made high effective rainwater harvesting of time and space of pasture in all -year growth periods under limited rainfall condition, then produced the potentiation of water. The ability of water ecology system of grassland were increased and the matching type of catchment and furrow planting were summarized, therefore distinctly increased water satisfied degree and water use efficiency of Medicago sativa.

关 键 词：旱作农田 退耕还草 草田水分 水分满足 节水增产 

分 类 号：S152.7[农业科学—土壤学]