Study On Long-term Fertilization On The Characters Of Potassium And Phosphorus Adsorbing And Releasing In Cinnamon Soil

In order to discover the influence of the characters of potassium and phosphorus adsorbing and releasing and that influence by the humus and it's compositions in innamon soil on long-term fertilization. Using long-term fertilization experiment in field management and indoor imimate experiment,and have a stude for the quantity and speed of potassium's absorbing and releasing,the quantity of phosphorus's absorbing,the rate of phosphorus's releasing and the dynamic model and the influence by humus and it's compositions.The results show that:(1) There are complexly influence for the potassium's absorbing and releasing in cinnamon soil with different deals.Deals with high quantity organic and chemistry fertilizer have a better for exchange potassium's absorbing and the nonexchange potassium's releasing,but little for exchange potassium's releasing;Deals with low quantity organic and chemistry fertilizer have a better for the exchange or nonexchange potassium's releasing,while have a restrain for exchange potassium's releasing.The comprehensive effect for deals with only chemistry fertilizer is not goog. The dynamic model of Elovich is the best model for forecasting and interpretation the adsorbing and releasing of potassium,the primary dynamic model is fit for forecasting and interpretation the non-exchange potassium.The fitting results show that long-term different fertilizer can influent the characteristics of non-exchange potassium by influent capacity and strength of supply.(2) There are different influence for phosphorus's absorbing and releasing in cinnamon soil with different deals.Deal with only nitrogen fertilizer or only organic fertilizer has a better for the absorbing of phosphorus,fertilizer with nitrogen and phosphorus has a better for releasing of phosphorus, deals with low quantity organic and chemistry fertilizer have a better for the absorbing and releasing of phosphorus.Totally speaking,deal in M1N not only have a good for the absorbing of phosphorus. But also have a good for improving the ability of phosphorus's releasing.The model of Freundlich is the best model for forecasting and interpretation the adsorbing and releasing of Phosphorus.(3) Humus in topsoil of cinnamon soil have a significant accumulation after 20 years different fertilizer application treatments, compared with no fertilizer application treatment. The effects of treatments on humus accumulation are the treatments of organic fertilizer application in high level>that in low level> the treatment of only chemical fertilizer application. The influence of application treatments on contents of humic acid (HA), fulvic acid (FA), and humin in humus is similar to the humus accumulation. But the influence degree is different among the components. The treatments of chemical fertilizer application only are suitable for the accumulation of fulvic acid, The treatments of organic fertilizer application are better for the content accumulation of humic acid.(4) Humus and it's compositions have a different influence on the characters of potassium's adsorbing and releaing. The total quantity of humus and the level of HA have more influence for the characters of potassium's absorbing and the characters of phosphorus's absorbing and releasing.The influence of characters of potassium's absorbing by the level of FA is stronger than the level of HA,but the influence of characters of phosphorus's absorbing and releasing by FA lower than the level of HA...