Feizi Mohammad, Aghakhani Abbas, Mostafazadeh-Fard Behrouz, Heidarpour Manochehr
Scientific Staff of Isfahan Agricultural and Natural Resources Research Center, P.O. Box 81785-199, Isfahan, Iran.
Pak J Biol Sci. 2007 Sep 1;10(17):2824-30. doi: 10.3923/pjbs.2007.2824.2830.
To determine salt tolerance of spring wheat genotype (On_Farm 9) to soil salinity (ECe) and drainage water salinity (ECd), a pot experiment containing three irrigation water salinities of 4, 9 and 12 dS m(-1) and four leaching levels of 3, 20, 29 and 37% was conducted in a completely randomized design arranged as factorial with 7 replications on a silty clay loam soil during 2005. The results showed that decrease of leaching water quality and quantity significantly increased soil and drainage water salinity and decreased crop yield and evapotranspiration. Application of leaching water fraction in the range of 20-29% were highly significant in decreasing soil salinity, drainage water salinity and increasing grain yield, while the most increase in crop evapotranspiration occurred in the range of 29-37%. This study shows that the effects of increase of soil salinity on grain relative yield are more significant than effects of increase of salinity of drainage water and wheat has greater threshold value in drainage water salinity than soil salinity method. The correlation of relative grain yield (Ry) with ECe and ECd indicated that ECd could estimate Ry as well as ECe.
为了确定春小麦基因型（田间9号）对土壤盐分（ECe）和排水水盐分（ECd）的耐盐性，于2005年在粉质粘壤土上进行了盆栽试验，试验采用完全随机设计，设置了4、9和12 dS m(-1) 三种灌溉水盐度以及3%、20%、29%和37%四个淋洗水平，以因子形式排列，重复7次。结果表明，淋洗水质量和数量的降低显著增加了土壤和排水水的盐分，降低了作物产量和蒸散量。施加20%-29%范围内的淋洗水比例对于降低土壤盐分、排水水盐分以及提高籽粒产量具有极显著效果，而作物蒸散量的最大增幅出现在29%-37%范围内。本研究表明，土壤盐分增加对籽粒相对产量的影响比排水水盐分增加的影响更为显著，并且小麦对排水水盐分的阈值高于土壤盐分法。籽粒相对产量（Ry）与ECe和ECd的相关性表明，ECd与ECe一样能够估算Ry。
