南方坡耕地种植苎麻水土保持机理研究  

The Study of Mechanism of Soil and Water Conservation of Ramie in South Slope Crop Land

作　　者：康万利[1] 揭雨成[1,2] 邢虎成[1,2] 

机构地区：[1]湖南农业大学苎麻研究所,长沙410128 [2]湖南省作物种质创新与利用重点实验室,长沙410128

出　　处：《中国农学通报》2012年第9期66-69,共4页Chinese Agricultural Science Bulletin

基　　金：湖南省科技厅重点项目(2010TP4004-1)

摘　　要：为了明确苎麻水土保持机理,进而为大面积利用苎麻治理坡耕地水土流失提供理论依据,对苎麻不同利用方式叶面积指数、茎叶截留效应、枯落物持水能力、地下根系分布进行了研究。结果表明:不收获小区苎麻叶面积指数明显大于对照;苎麻不收获小区茎叶截留量最大为2.56 mm,高于其他小区;最大枯落物持水量,不收获小区最大为2.4 mm,饲用小区最小为0 mm;种植苎麻小区不同类型根系鲜重为萝卜根>扁担根>龙头根>细根;苎麻根系深度可达60 cm,玉米根系深度只有30 cm。研究表明,苎麻水土保持效果好,主要是其根系入土深、主根发达、根系分布广、覆盖时间长、叶面积指数大。In order to determine ramie mechanism of soil and water conservation,and for the use of ramie management of large area to provide theoretical basis for the slope soil and water loss,the different utilization of ramie leaf area index,leaf retention effect,water holding capacity of litter,underground root distribution were studied to clarify the mechanism of its soil and water conservation.The results showed that： no harvest area ramie leaf area index was significantly higher than that of control;ramie leaf area did not harvest a maximum interception 2.56 mm,higher than the other plots;its coverage on the lower leaf surface temperature and maintain the soil moisture was more obvious and effective;planting ramie plot of fresh weight of different root that the rule was radish rootpole rootleading rootfine roots;ramie root depth of up to 60 cm,maize root depth of only 30 cm.This research showed that ramie soil and water conservation effect was good,the main reasons were the root system,main root deep soil developed,and the root system wide distribution,covering time long,leaf area index.

关 键 词：苎麻 最大茎叶截留率 最大持水量 根系分布 

分 类 号：S19[农业科学—农业基础科学]