Effects of Irrigation on the Selective Transport of Na+ and K+ in Corn

Abstract

Due to its special climate and geological reasons, Tianjin Binhai area has formed a large area of saline-alkali land. It is of great significance to explore the distribution of salt ions in crops under drip irrigation conditions. In this paper, maize was used as the research object, and different irrigation amount treatment was set up to study the distribution of Na+ and K+ in corn under drip irrigation conditions, and the transport selectivity of corn to Na+ and K+ was analyzed. The results show that the Na+ absorbed by corn is mainly distributed in roots and K+ is mainly distributed in stems and leaves; the transport selectivity coefficient decreases with the increase of irrigation amount, and the increase of Na+/K+ value is the improvement of salt tolerance of corn when irrigation amount is small. Corn can inhibit the transport of Na+ to the ground by enhancing the transport of K+ and reduce the damage to corn.