Effects Of Crop Rotation Combined With Fertilization On Soil Properties

In order to alleviate the poor soil in Yinshan Hilly Region,the ground temperature is low,and continuous cropping obstacles are more serious.A crop rotation combined fertilization experiment for different crops was designed to explore the most appropriate crop rotation combined with fertilization mode to reduce adverse effects of continuous cropping on soil and crop yields,and to use organic fertilizers and chemical fertilizers to increase crop microbial activity to effectively alleviate the current situation and increase production.The main conclusions are as follows:(1)At different growth stages of crops,the effect of fertilization treatment on dry matter accumulation was better than that of non-fertilizer treatment,and the treatment effect was best when the rotation treatment was combined with organic fertilizer application.The treatment effect of the most pre-cropping crops of black beans is also significantly better than other cropping modes.(2)In the two crop periods,the impact of different treatments on soil bulk density was not significant.During the exuberant period,the bulk density of B-M(Y)treatment was reduced by 2% compared with M(Y)treatment,indicating that the treatment of potato as a former crop had a significant effect on reducing soil bulk density.During the flourishing period,black bean rotation combined with different fertilization A-Y(D)and B-Y(D)treatment decreased by 2.3% and 3.2%,respectively,compared with Y(D)treatment,indicating that rotation-assisted fertilization has a significant improvement in soil bulk density.(3)Rotation combined with different fertilization treatments had higher content of soil available nutrients and organic matter than non-fertilizer treatment.The organic matter content of potato rotation combined with organic fertilizer A-D(M)during the vigorous period was 39% higher than that of M treatment.Both organic fertilizers showed outstanding organic fertilizer performance during the vigorous period,but they showed that chemical fertilizers were superior to organic fertilizers during harvesting.(4)Soil microbial biomass and enzyme activity in different soil fertility treatments were higher than those in no fertilizer treatment.The overall trend was that organic manure combined with rotation had the highest soil microbial biomass carbon content,and in the flourishing period,A-D(M)was 43.5% higher and 50.8% higher than the other two crop rotations combined with organic manure.Fertilizer combined with rotations had the highest microbial biomass nitrogen.Different fertilizer treatments had different effects on soil enzyme activity,but they were significantly better than no fertilizer treatment.(5)After the application of organic fertilizer,the amount of microorganisms in the soil was better than other fertilizers.The combination of rotation and organic manure application performed better than other rotation modes.(6)Rotation combined with fertilization can increase crop yield to varying degrees.And applying organic fertilizer combined with rotation has a significant effect on the yield improvement.In different rotation patterns,black beans were used as the potato's former crop combined with organic fertilizer A-D(M)as the optimal treatment,and the effect on the yield increase was obvious,which was 41.7% higher than that of continuous cropping without fertilizer treatment.