膜下滴灌棉田间作盐生植物改良盐碱地效果

摘要

To improve saline-alkali soil,the halophyte was interplanted in cotton fields through drip irrigation under film.The average water content in interplanted Suaeda salsa and Salicornia europaea were larger than those in the control plot by 61.0% and 34.1% respectively.The desalinizations were 43.1% (S.salsa), 30.6% (S.europaea)and 17.2 (control plot).The K+/Na+ ratio and the soil bulk density increased,while the Cl- and soil porosity decreased,and the cotton yield increased.This suggested that interplanting halophyte in cotton fields is a good option to improve saline-alkali soil,with no requirement for much more water.%通过在膜下滴灌棉田膜间空地上间作盐生植物，探求对盐碱地的改良效果。结果表明，生育期内间作碱蓬和盐角草小区的平均含水量比对照小区大61．0％和34．1％，显著地提高土壤脱盐率，脱盐率分别为43．1％（碱蓬），30．6％（盐角草）和17．2％（对照），且间作提高了K＋/Na＋，降低了对作物有毒害作用的Cl-含量，并使土壤容重下降，孔隙度增加，最终棉花产量也得到提高。表明在不增加耗水的条件下，棉田间作盐生植物是一种有效地改良盐碱地的措施。