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以麦桐复合经营为例，研究了林带的不同配置结构、林带覆盖率与小麦产量之间的关系，并通过一系列数学方法实现了林带结构的优化．结果表明，在一个轮伐期内，泡桐林带覆盖率累计均值为１０．１％～１０．９％时，小麦相对产量累计均值最大（１０５．４），为最优林带覆盖率累计均值．最优林带距（Ｄ）与轮伐期（Ｔ）之间的关系为：Ｄ＝０．６００＋１１．０４２Ｔ－０．７８７Ｔ２＋０．０２７３Ｔ３（Ｒ２＝９９．９％）．
Taking the compound management of wheat straw as an example, the relationship between different configurations of forest belts, the coverage of forest belts and the wheat yield was studied. The structure of the forest belts was optimized by a series of mathematical methods. The results showed that the accumulative mean of relative yield of wheat was the highest (105.4) when the cumulative mean coverage of Paulownia trees was 10.1% ~ 10.9% in one rotation. The relationship between optimal forest distance (D) and rotation period (T) is: D = 0.600 + 11.042T-0.787T2 + 0.0273T3 (R2 = 99.9%).