Effects Of Straw Returning And Fertilizer Application On Maize Growth And Brown Soil Nutrient

Straw returning is an effective way to use straw,it has to improve the soil organic matter content,improve soil physical properties,increase soil microbial activity and other effects.Straw returned to the field has a direct return to the field and heap back to field and other ways.Different field methods have different decay and nutrient release characteristics and will produce different farmland effects.But the straw alone also has a slow decomposition rate,the nutrient is not easy to release the problem,and also cause microbial and plant nitrogen phenomenon.A large number of studies have shown that straw and chemical fertilizers can effectively improve such problems,improve the supply capacity of soil nutrients and ensure higher crop yield potential.Although a large number of research on the effect of straw returning to soil has been carried out at home and abroad,it is still to be further explored in the way of the best straw returning to the northeastern region.In this study,The results showed that the nutrient cycling and nutrient uptake of maize were studied,and the effects of maize yield Efficiency and fertilizer use efficiency,and provide theoretical reference for cultivating soil in Northeast China and establishing reasonable straw returning system.The main findings are as follows:(1)The results showed that the yield of maize could be increased and the stem diameter,plant height and chlorophyll content were increased.Straw return to the field with the most significant effect of fertilizer,followed by single application of fertilizer treatment,once again a single straw treatment.This indicated that the single application of straw fertilizer could not provide sufficient available nutrients for the season crops,and the straw returning to the fertilizer could promote the growth of the maize growth period,improve the light and performance,and maximize the crop yield.(2)Straw returning to field and applying chemical fertilizers could significantly affect soil nutrient status.The effect of straw incorporation and chemical fertilizers on improving nutrient index of soil was better than that of single straw or single application of chemical fertilizer,and the application of chemical fertilizers alone to soil available nutrient was better than that of single straw.From the analysis of the correlation between soil nutrient and crop,the supply situation of nutrient supply is an important limiting factor for maize yield formation.(3)Straw directly to the field with fertilizer can greatly improve the fertilizer utilization rate,while the other treatment is not obvious,which indicates that the straw directly to the fertilizer can make the crop priority to use fertilizer nutrients,fertilizer to be sufficient Supply of crop growth,the straw after a period of decomposition of mineralized nutrients will play a complementary role in soil nutrients.(4)In the case of straw returning to chemical fertilizers,the effect of non-decomposing straw fertilizer on maize growth and soil nutrient improvement was better than that of decomposed straw.In the case of single straw,the effect is better than the non-decomposing straw directly into the field.This can reflect the allocation of fertilizer and different methods of returning to the field will produce different straw decomposition and nutrient supply process,its mechanism and mechanism of the mechanism remains to be further explored.