文献类型： 会议论文

第一作者： Fatemeh Razzaghi

作者： Fatemeh Razzaghi ¹ ; Seyed Hamid Ahmadi ² ; Christian R. Jensen ³ ; Sven-Erik Jacobsen ⁴ ; Mathias N. Andersen ⁵ ;

作者机构： 1.Aarhus University, Faculty of Agricultural Sciences, Department of Agroecology and Environment, Blichers Allé 20, DK-8830 Tjele, Denmark, Fatemeh.Razzaghi@agrsci.dk

2.Department of Irrigation, Faculty of Agriculture, Shiraz University, Shiraz, Iran, seyedhamid.ahmadi@gmail.com

3.University of Copenhagen, Faculty of Life Sciences, Department of Agriculture and Ecology, H?jbakkegaard Allé 13, DK-2630 Taastrup, Denmark, crj@life.ku.dk

4.University of Copenhagen, Faculty of Life Sciences, Department of Agriculture and Ecology, H?jbakkegaard Allé 13, DK-2630 Taastrup, Denmark,seja@life.ku.dk

5.Aarhus University, Faculty of Agricultural Sciences, Department of Agroecology and Environment, Blichers Allé 20, DK-8830 Tjele, Denmark, MathiasN.Andersen@agrsci.dk

关键词： quinoa (chenopodium quinoa willd);salt tolerance;lysimeter;threshold electrical conductivity;relative yield

会议名称： International congress on irrigation and drainage

主办单位：

页码： 149-154

摘要： Plant growth and economic yield decreases when high salt concentrations build-up in theroot zone. Quinoa is a facultative halophyte crop, which can withstand saline conditions.There is no documentation of the threshold soil electrical conductivity that cause yieldreduction in quinoa under field conditions. In this study the threshold electrical conductivityof soil saturation extract (EC_e) and maximum EC_e corresponding to no economic yield ofquinoa (cv. Titicaca) were determined. The experimental factors were five levels of salinesolution (0, 10, 20, 30 and 40 dS m~(-1)) imposed during flowering stage followed by eitherfull irrigation (FI) with tap water, or progressive drought (PD), during the seed filling period.The FI_0 yield was 2.45 t ha~(-1), which was not significantly different from seed yield of PD_0.The maximum relative yield (with respect to the FI_0 treatment) was 97% obtained in PD_0and the minimum relative yield was 47% observed at 40 dS m~(-1) saline solution (FI_(40)). Theresults showed that quinoa can grow under highly saline conditions although the seed yielddecreases with increased EC_e. The threshold EC_e of quinoa was estimated to be between3-6 dS m~(-1). There was 50% reduction in seed yield of FI_(40) and PD_(40) treatments at EC_e of24 dS m~(-1). The EC_e leading to no economic seed yield was extrapolated to be 51.5 dSm~(-1). The results showed that quinoa can be classified as a salt tolerant crop according tothe Mass and Hoffman classification.

分类号： s27