| In this thesis, through continuous two-year plot experiment and research, the conclusions are as follows:Winter-wheat relay cropping with summer-maize is an important way increasing maize production .At present , Although the planting area of relay cropped maize is decreasing, we can finish the aim that satisfy the need of relay cropping and don' t destroy maize seeding if we can design a reasonable experiment. This paper evaluate all models from production , economical and ecological benefit with the method of grey relational grade analysis, the results shows that the second treatment can satisfy the aim, that is , wheat was planted four rows continuously, row spacing is twenty centimeter, then isolated another four rows by thirty centimeter, maize was planted in the thirty centimeter row middle, the width of interrow of maize is ninety centimeter. Meantime , the fourth treatment is well too,Different treatments have obvious difference on maize and wheat growth not only on individuals but also on groups. The kernel number and weight of wheat ear of the second treatment is higher than other treatments, but the ear density decrease, anti-falling over become stronger , The chlorophyll content , the LAI and the LAI of growth period, the weight of dry substance of the second treatment maize are higher than other treatments, its plant height decrease little , its regulardegree increase, microclimate of all treatments is different , sun radial energy acceptance and wind speed of the second treatment is more than other treatments in all periods of growth on the same time, This experiment can deal with the problem of people burning stems, Relay cropping make it impossible to burn stems in field, instead, peasant put those stem in the row middle of maize, this method can exclude burning stems behavior, decrease the air pollution and evaporation , improve returning stems into field and water use ratio...
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