|
|
Effect of fertilizing proportion on the distribution of phosphorus between solid and liquid phase in long term experiment |
|
|
Abstract It is important to enhance the phosphorus utilization efficiency by the suitable land management to decrease the non-point source pollution in the sustainable and stable of ecological agriculture. The main objective of this research is to declare how the different fertilizer treatments influence the phosphorus distribution between solid and liquid phase. This experiment tested 11nitrogen-phosphorus, 8nitrogen-phosphorus-organic fertilizer ratios in a 25years long-term wheat experiment field in Changwu research station. The distribution coefficient of phosphorus between solid and liquid phase had correlation with Ca2-P and active organic phosphorus. Despite the distribution coefficient appeared reverse trend, the total P, P in solid phase and P in liquid phase all were increased with the P fertilizer application when in the same nitrogen fertilizer level (N90). The nitrogen fertilizer applications can affect the phosphorus usage. The total P was the minimum, the P in liquid phase was the maximum and the available P in solid phase has a decrease trend at N135when P fertilizer at the same level. The distribution coefficient was the maximum at only applying P fertilizer (No nitrogen). The organic matter can trigger the effectiveness of P. Balanced fertilization has magnitude effect on P efficient utilization.
|
Received: 29 June 2010
|
|
|
|
|
|
|