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根据 １９８９ 年以来进行的 ８ 种间套种方式试验、示范的资料，运用技术经济评价原则和灰色关联综合评价方法，筛选出西吉地区山旱地生产效益高的立体复合种植方式：“马铃薯—豌豆、玉米—白芸豆”两个优化组合。它比丰产田小麦（ Ｃ Ｋ２）平均增产４６．３％ 、８５．１％ ，纯收入增加 ４３．３％ 、２１．９％ ，能量总产出高 ７１．３％ 、１７２． ５％ ，提高年光能利用率 ７０． ０％ 、１７５．０％ ，为本地区农业生产种植方式决策提供科学的参考依据。
According to the experiment and demonstration data of eight intercropping methods conducted since 1989, using the principle of technical and economic evaluation and gray correlation comprehensive evaluation method, three-dimensional compound planting methods with high production efficiency in mountain and dry land in Xijie area were screened out: “potato - pea, Corn - white kidney beans ”two optimized combination. It increased yields by 46.3% and 85.1% on average compared with high yield wheat (C K2), increased net income by 43.3% and 21.9%, and increased total energy output by 71.3% and 172% respectively. 5%, improve the utilization of solar energy 70. 0%, 175.0%, providing scientific reference for decision-making of planting methods of agricultural production in this area.