Effect Of Organic Fertilizer Application On Organic Carbon And Nutrients In Different Occurrence Layers Of Lou Soil

Lou soil is an important agricultural soil in the Guanzhong area,and the cultivated land of the rammed earth accounts for 57% of the total cultivated land in Guanzhong.Under natural and man-made conditions,in some areas,the exposure of different soil layers may become arable land and different measures need to be taken to fertilize it.Therefore,in this study,different layers of alumina were used as the research object to analyze the effect of different organic fertilizer application methods on the soil nutrients and organic carbon content in the arable layer,clay layer,calcium layer and parent layer of the soil.To provide theoretical references for the improvement of local farmers' fertilization methods,with a view to further improving the fertility of rammed soil and increasing the yield of arable land.The study shows that the contents of total nitrogen,organic carbon,available potassium,and microbial carbon in tiller layer,sticky layer,calcium layer,and parent layer are all reduced with the deepening of soil layer;the total phosphorus content is expressed as tillage layer> parent layer.>Calcium laminae> Adhesive layer;Available phosphorus content is the highest in the tillage layer,decreasing from the tillage layer to the Calcium layer,but below the Calcium layer,the content increases with the increase of the soil layer;Soil total potassium content is different The difference between the occurrence layers was small;the content of calcium carbonate in the soil was as follows: calcium deposit> parent layer> tillage layer> adhesive layer.After one month of indoor cultivation of different layers of bauxite,there was no significant difference in total nitrogen,total phosphorus,available potassium,and organic carbon between the unfertilized nutrient content and the culture,but total potassium,available phosphorus,nitrate nitrogen,The contents of ammonia nitrogen,microbial carbon,and calcium carbonate were significantly different.After two months of fertilization,the differences in total nitrogen content in the different layers of the soil were significantly different,and there was no significant difference in total phosphorus and available potassium contents.There was no significant difference in organic carbon content between stratum and calcareous layers,but there was a significant difference in organic carbon content in the parent layer.The differences in total potassium,available phosphorus,nitrate nitrogen,ammonia nitrogen,microbial carbon,and calcium carbonate in different layers of alumina were still different.Significantly;After three months of fertilization,the total nitrogen content in the different layers of the alumina increased but remained significantly lower than before cultivation,and there was no significant difference in available potassium content between the adhesive layer and the calcium layer.The available potassium content in the parent layer was significantly different.There was no significant difference in the organic carbon content in the different layers of the bauxite.The differences in total phosphorus,total potassium,available phosphorus,nitrate nitrogen,ammonia nitrogen,organic carbon,and microbial carbon contentwere significant..In the three-month indoor cultivation of different layers of alumina after different fertilization treatments,total nitrogen,total phosphorus,total potassium,available phosphorus,available potassium,ammonia nitrogen,nitrate nitrogen,and organic carbon all follow organic fertilizers.The contents increased and increased,and the difference between different fertilization ratio treatments was significant.The contents of total potassium and calcium carbonate increased with the increase of organic fertilizer application content,but the content increased during different fertilization treatments.After indoor treatment with different fertilization ratios,the contents of total potassium and calcium carbonate increased.In the first month of cultivation,the nitrate content in the plough layer increased with the increase of the organic fertilizer application content,and the adherence layer decreased with the increase of the application organic fertilizer content and both were lower than the background value.The Calcium layer was used.The nitrate nitrogen content of 5% organic fertilizer is higher than the nitrate nitrogen content of 15% and 10% organic fertilizer;the calcium carbonate content of 15% organic fertilizer applied to different layers of alumina is lower than that of 5% and10%.Fertilized calcium carbonate content;Microbial carbon content of applied 10% organic fertilizer in plough layer was lower than microbial carbon content in 5% and 10% organic fertilizer application;Microbial carbon content in adhesion layer and Calcium layer applied15% organic fertilizer was lower than The microbial carbon content of 10% and 5% organic fertilizer.After the second month of indoor cultivation after different fertilization ratios,the change trend of nitrate nitrogen content in different layers of plutonium soil was the same as that in the first month.The content of calcium carbonate and microbial carbon increased with the increase of organic fertilizer content..After the third month of indoor cultivation after different fertilization ratios,the nitrate nitrogen content of the organic fertilizer applied to the topsoil and the sticky layer was lower than that of the organic fertilizer by applying 5% and10% calcium carbonate;The change trend of the content was the same as that of the second month;the microbial carbon content of the 15% organic fertilizer applied to the plough layer,the adhesive layer,and the calcium deposit was lower than the microbial carbon content of the5% and 10% organic fertilizer.