Abstract: With the comparative experiment,we have analysed whether the straw of wheat return in farmland to soil nourishing ingredient of content with influence and diversificational rule in wheat-corn crops planting annually, then in order to seek the primary and best ploughing method.There are four disposals in this experiment.This experiment was adopted randomicity array, for 3 times repetition.From result of the experiment, it has indicated that under dissimilarity measures of farming disposal, the fertility which is based on apiece disposal of small sections after harvest of wheat will have the very similar essence in all.During the seed-growing and young planting period, the period of jointing, big-trumpet-jaws period, the male-ear-head period, grouting period, the ripeness period, testing aftermath of soil nourishing content which reveals diversity, and then the delay of time has much more in differences.Each period apiece disposal average values in comparative has indicates that organic soil substance content has the lowest in straw of wheat non-return to farmland and no ploughing up to soil.The absolute value-reducing-extent 1.24-2.11 g/kg, opposite value-reducing-extent 9.01%-15.31%.The treatment of wheat straw back to field than the wheat straw not to return field, the average increase yield 940.60 kg/ha.Increase yield rate was 10.54%.The unit area yield of treatment ③ was highest, followed by treatmenT₁.In order to attain the high-yield in corn,uninterrupted cultivate soil for fertility, enhance farming stratum soil organic substance content, it should be the practical and popularized method of farming by straw of wheat return to farmland

Key words: Corn, Straw of wheat return to farmland, Soil nourishing ingredient content, Effect

CLC Number: 

• S15