Shiraz University Iran Agricultural Research 1013-9885 34 2 2016 01 21 Effect of salinity and deficit irrigation on some ions uptake by rapeseed (Brassica napus L.) under two planting methods اثر شوری و کم آبیاری بر جذب برخی عناصر توسط کلزا 1 14 3542 10.22099/iar.2016.3542 EN Ali Shabani Department of Water Engineering, College of Agriculture, Shiraz University, Shiraz, I. R. Iran A.R. Sepaskhah Department of Water Engineering, College of Agriculture, Shiraz University, Shiraz, I. R. Iran A.A. Kamgar Haghighi Department of Water Engineering, College of Agriculture, Shiraz University, Shiraz, I. R. Iran Journal Article 2013 04 20 ABSTRACT- In this study, effect of deficit irrigation with different salinity levels and planting methods (in-furrow and on-ridge) on nutrient and toxic ions uptake by rapeseed was investigated in a two-year experiment. The experiment was conducted at Research Station, located in the College of Agriculture, Shiraz University, I.R. of Iran. Results indicated that an increase in water stress level decreased uptake of potassium (K), calcium (Ca), sodium (Na) and chloride (Cl) by plant and with exception of K, those uptakes were enhanced by an increase in salinity of water and soil. Furthermore, a decrease in applied water decreased the threshold of Na in soil for seed yield reduction. Deficit irrigation had a significant effect on slope of the fitted line between Cl in plant (Cl_p) and Cl in soil. The Cl_p threshold for seed yield reduction was significantly different for two planting methods in full irrigation regime so that seed yield reduction occurred in higher Cl_p in in-furrow planting method. Also, a decrease in applied water decreased Cl_p threshold for seed yield reduction. https://iar.shirazu.ac.ir/article_3542_d78a413c8207565f1b503803643c671a.pdf