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Abstract Taking monocultured potato as the contrast，this paper set up 2 treatments of potato intercropping seepweed，potato intercropping alfalfa；and studied the effects of saline-alkali potato intercropping halophytes on potato yield，improvement of saline-alkali land and economic benefits．The results showed that comparing with the contrast，there was no significant differences on potato yield between potato intercropping seepweed treatment and potato intercropping alfalfa treatment，but the rate of commercial potato was increased significantly．The total contents of soil soluble salt were significantly lower than that of the contrast．Comparing with the contrast，total soil water soluble salt quantities in potato intercropping seepweed treatment and potato intercropping alfalfa treatment were reduced by 5.34% and 7.28%，respectively．Meanwhile，the contents of soil available nitrogen，rapidly available potassium and saline ions as K+，Ca2+，Mg2+ and Cl- in soil were significantly decreased comparing with the contrast．The soil cation exchange capacity，contents of SO42- and HCO3- were significantly increased，while there was no obvious differences in contents of available phosphorus and Na+ with those of the contrast．The intercropping model significantly improved economic benefits．The revenue of potato intercropping seepweed treatment and potato intercropping alfalfa treatment were increased by 227 83.5 yuan and 3 424.5 yuan per hm2，comparing with those of the contrast．In conclusion，planting models of intercropping seepweed or alfalfa were suitable for potato production in saline-alkali land．
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Received: 28 November 2022
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