Salt Tolerance Evaluation of Seven Legume Forages at Seed Germination Stage

LI Chun-yan; CHEN En; LUO Xu-hui; YING Zhao-yang

doi:10.13651/j.cnki.fjnykj.2023.12.006

Abstract：In order to provide reference for the selection of saline-alkali tolerant legume forage plants for the ecological restoration of salinized soil,the seeds of Sesbania cannabina,Crotalaria pallida,Minnan forage(India)Vigna un-guiculata,Indonesian Vigna rabiata,Senna tora,Acalypha supera,and Chamaecrista mimosoides were taken as the materials,and different concentrations of NaCl solution and Na2SO4 solution[0(CK),50,100,150 mmol/L]were used for the stress treatment.The daily germination number of each legume forage seed was counted,and the cumula-tive germination rate,germination rate,relative germination rate and relative salt damage rate were calculated.The results showed that low concentration of salt solution(50 mmol·L-1)could promote the initial germination time of Sesbania cannabina and Crotalaria pallida seeds,while high concentration of salt solution(150 mmol·L-1)could delay the initial germination time of Crotalaria pallida,Senna tora,Chamaecrista mimosoides and Acalypha su-pera,and inhibit the seed germination.According to the membership function formula,under the stress of NaCl,the salt tolerance of seven forage seeds was as follows:Minnan forage(India)Vigna unguiculata＞Crotalaria pallida＞Indonesian Vigna rabiata＞Sesbania cannabina＞Senna tora＞Chamaecrista mimosoides＞Acalypha supera.Under the stress of Na2SO4,the salt tolerance of seven forage seeds was as follows:Minnan forage(India)Vigna unguicu-lata＞Sesbania cannabina＞Senna tora＞Crotalaria pallida＞Chamaecrista mimosoides＞Indonesian Vigna rabiata＞Acalypha supera.