Study On Determination Of Phosphorus And Situation Of Crop Growth In Microaggregates From Soil

Phosphorus is necessary for the growth and development of plant nutrient elements of many important compounds in plants requires the formation of phosphorus participation, but also for the yield and quality of crops have an important role. Therefore, on the soil of phosphorus adsorption and desorption of organic phosphorus research, has increasingly become in the field of soil chemistry problems a concern. I used contrast, collected from six pairs of high or low levels of two different typical brown soil fertility in different grain-class micro-aggregates, or the original soil and <10μm,10-50μm,50-250μm phosphorus nutrient status was studied. further analysis of its impact on crop growth.Research data results show that: high fat soil and the soil micro-aggregates of different fractions of the total phosphorus and phosphorus adsorption, desorption phosphorus, organic phosphorus different components of fat were significantly higher than the corresponding values low, and decreased with the tablets of class (desorption except phosphorus) in its corresponding value has increased significantly. Which , 10-50μm micro-aggregates of the largest phosphate reserves, <10μm micro-aggregates in the phosphorus adsorption and maintain the largest contribution to the. Therefore, we can put them as the characteristics of micro-brown soil aggregates. While studies have shown that organic phosphorus, organic phosphorus and Medium activity of organic phosphorus in the 10-50μm , 50-250μm in the micro-aggregates content, the middle-stable organic phosphorus and stable organic phosphorus mainly concentrated in the <10μm in the micro-aggregates. The results show that large aggregates of soil phosphorus is the main source of supply, small aggregates is preserving soil phosphorus places.From the experimental results on the impact of crop growth, high fertility soil crops growing well, not the performance of phosphorus deficiency symptoms. Low soil fertility and crop shows that the phosphorus deficiency disease.Through the above system of work, not only proved the plants absorb the main source of phosphorus, control effectiveness of soil phosphorus plant biochemistry and phosphorus cycle is of great significance, and more security fertilizer in the soil for fertilizer and Performance The study provides a more systematic basis data.