膜下滴灌棉花根系分布规律研究  

Study on Root Distribution Rule of Cotton in Drip Irrigation Under Mulched-film

作　　者：王一民[1] 虎胆.吐马尔白 张金珠[1] 弋鹏飞[1] 吴争光[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052

出　　处：《节水灌溉》2010年第9期1-4,7,共5页Water Saving Irrigation

基　　金：国家自然科学基金(50669007);国家科技支撑项目(2007BAD38B01);新疆自治区科技攻关重大专项(200731137-1);新疆自治区自然科学基金(200821172);新疆水利水电工程重点学科资助

摘　　要：在棉花不同的生育期,在窄行及宽行采用根钻取样的方法,对棉花根系分布进行研究,结果表明：随着深度的增加,窄行和宽行的根重密度及根长密度逐渐减小,在棉花蕾期,宽行根系分布较多,窄行较少,棉花花期根系主要集中在20~40 cm土层内;进入铃期后,0~20 cm土层内宽行根重密度大于窄行,20~40 cm的土层范围内,窄行根重密度大于宽行,而在40 cm以下,宽行大于窄行,根系的分布宽行较广;在棉花进入絮期后,窄行根系的生长优于宽行,窄行的土壤条件对根系的生长更为有利,窄行分布的吸水根系相对较多。Research on the growth and distribution regulation of cotton roots under the sub-film is conducted in this paper.It is found that with the depth increase,the root weight density and root length density decrease gradually at narrow row and wide raw.At flower bud stage,there are more root distribution in wide row than in narrow row.The more root concentrate on the area between 20 cm to 40 cm depth at full-bloom stage of cotton.At boll stage,there are more root weight density of in wide row than in narrow row among 0 to 20 cm depth,more root distribution in narrow row than wide row among 20 cm to 40 cm depth,but there are more roots in wide row below 40cm depth.The environment of narrow row is profitable to root growth and distribution,and there is more root distribution in narrow row than in wide row.

关 键 词：膜下滴灌 根系分布 根重密度 根长密度 

分 类 号：S152.7[农业科学—土壤学] S275.6[农业科学—农业基础科学]