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在高肥力池栽条件下，畦埂宽６５ｃｍ，种６行小麦，行距２５ｃｍ，采用对照、遮光、隔根、遮光＋隔根４种处理，研究了小麦的边际效应。结果表明：高肥力条件下小麦边行优势仅局限在边１行，光照和土壤养分测定结果证明此结论可靠。边行比内行增产不足５０％（４５．６％），两个边行增加的产量不能弥补少种１行小麦损失的产量。在边行优势中，地上部气象要素的单独贡献最大（５６．１４％），其次为地上和地下部的交互作用（２３．９％），地下部土壤因素的单独贡献最小（１９．９６％）。边行穗数、穗粒数、千粒重分别比内行增加１６．０％、１４．３％和１１．８％，说明三者对边行优势的贡献大致相同。
Under the conditions of high fertility pool, the width of 65 cm, the width of 6 rows of wheat and the row spacing of 25 cm were used to study the marginal effects of wheat by four treatments: control, shading, root separation and shading + septum. The results showed that the edge advantage of wheat under high fertility conditions was limited to only one row, and the results of light and soil nutrients proved that the conclusion was reliable. The yield increase of less than 50% (45.6%) from the experts on the one hand and the increase of the output on the two sides of the other side can not make up for the loss of wheat on the one-line less wheat. The meteorological elements of the aboveground part make the largest contribution (56.14%), followed by the interaction between the aboveground part and the underground part (23.9%) and the lowest contribution of the soil part (19.96% ). The number of spikes per panicle, grains per spike and grain weight per thousand increased by 16.0%, 14.3% and 11.8% respectively compared with those of the experts, which showed that the contribution of the three to edgewise advantage was roughly the same.