We studied pot cultivated Haloxylon ammodendron's growth, physiological changes and drought resistance under NaCl, H2SiO3 , and NaCl+H2SiO3 treatments. Results show that 0.3g/kg NaCl, 0.2g/kg H2SiO3 or 0.3g/kg NaCl+0.1g/kg H2SiO3 treatments can effectively promote growth and improve the drought resistance of H. ammodendron. Compared with that without NaCl treatment, H. ammodendron's height, crown diameter and fresh weight increased by 42%, 91% and 62% respectively under 0.3g/kg NaCl treatment, and its main stem diameter, main root diameter and main root length increased by 40%, 39% and 23%, respectively. Compared with that without H2SiO3 treatments, H. ammodendron's height, crown diameter and fresh weight increased by 36%, 45% and 27% respectively under 0.2g/kg H2SiO3 treatment, and its main stem diameter, main root diameter and main root length increased by 23%, 23% and 20%, respectively. Compared with that under 0.3 g/kg NaCl treatment, H. ammodendron's height, crown diameter and fresh weight and main root length increased by 9%, 10%, 17% and 12% respectively under 0.3g/kg NaCl+0.1g/kg H2SiO3 treatment. Compared with that under 0.1g/kg H2SiO3 treatment, H. ammodendron's height, crown diameter and fresh weight increased by 28%, 76% and 68% respectively under 0.3g/kg NaCl+0.1g/kg H2SiO3 treatment, and its main stem diameter, main root diameter and main root length increased by 30%, 32% and 27%, respectively. This suggests that moderate levels of NaCl+H2SiO3 interaction can effectively promote growth and improve drought resistance of H. ammodendron than separate applications of NaCl or H2SiO3.
JianJun KangSuoMin WangMing ZhaoGuangYu LiZiHui Yang
