利用晴天条件下的观测资料，对沟麦不同种植方式的光照条件进行了研究。结果表明：（１）与对照相比，群体内各层总辐射的相对吸收率上层（６０～８０ｃｍ）减少０５％～２％、中层（４０～６０ｃｍ）增加０５％～３４％、下层（２０～４０ｃｍ）增加３％～６％；（２）各不同处理群体反射率相差不超过２％；（３）理论计算表明，相同处理方式下，东西行向比南北行向接受太阳光直接照射的时间明显延长；（４）沟麦种植改变了净辐射在作物群体中的分布规律，其规律为与对照相比，朝阳侧增加，背阳侧变化不大，行中减少，平均增多 Based on the observation data under sunny conditions, the light conditions of different planting modes of ditch wheat and wheat were studied. The results showed that: (1) Compared with the control, the relative absorption of all layers in the population decreased by 0.5% ~ 2%, while the middle layer (40 ~ 60 cm) increased by 05% ~ 3 (3) The theoretical calculation shows that under the same treatment mode, the east-west line is higher than the north-south line direction (4) The planting of ditch wheat and wheat changed the distribution of net radiation in crop groups. The regularity was that on the sunward side, the change on the dorsal sun side was little, , An average increase