关键词: 碱地肤, Na⁺/H⁺逆向转运蛋白基因, 耐盐碱性

Abstract: Phytoallelopathy affects the function and dynamics of agro-system, and phytochemical ecological re-search will benefit the construction of eco－agriculture, which displays in the following main aspects：weed control, establishment of reasonal cropping system, implementation of crop genic optimization,re-duction of applying synthetic chemicals and control of insect pests.

Key words: Kochia sieversiana, Na⁺/H⁺ antiporter gene, saline-alkali tolerance.