Response of Seed Germination and Seedling Growth of Red Clovers on Alkaloid-Saline Stress

Soil salinization and alkalization was a series environmental and ecological problem in Songnen plain.In order to evaluate the tolerance of red clover on saline-alkaloid stress,the response of seed germination and seedling growth of new red clover strain(Z1308)on the saline-alkaloid stress was studied.The results showed that red clover had higher seed germination and seedling growth when stressed by lower saline-alkaloid(concentration was≤40mmol·L~(-1))compared with CK,but significantly declined when the concentration was exceed 80mmol·L~(-1).There was a clearly negative relationship between germination power,germination rate,germination index,vigor index and concentration of saline-alkaloid solution(P0.01).The critical value that red clover could germinate by saline-alkaloid stress was 102.2mmol·L~(-1).The result also indicated that root length was more sensitive to saline-alkaloid stress than shoot height.