Research Of Nutrient Management In Peach Orchard In Pinggu County Beijing City

There are 65% peach orchards of Beijing in Pinggu County and it is the manjor peach production area. In order to evaluate the effects of conventional nutrient management on peach production and soil, we do the field survey in 2005. By analysis the peach orchards fertilizer application rate and the composition of fertilizer, we found that the total nitrogen, phosphorous and potassium are over applied rate. The nitrogen over application is especially high.By analyzing peach orchard soil nutrient data, Pinggu peach orchard soil element background value is at high level under the current production conditions. Compare the peach orchard soil nutrient of 1980 with peach orchard soil nutrient of 2005, the total soil nitrogen and phosphorous content are raising rapidly and the total soil potassium has a bit lower. Ccompared with history soil data, peach orchards soil nutrient contents and high fertility peach orchard area both have a wide margin rise. This situation is fit with the fact that fertilizer is over applied in Pinggu peach orchard.According to the field survey results, doing experiment to reaseach the effects of different nitrogen applied rates on peach growth, fruit yield and fruit quality. The experiment data shows that even if the soil nutrient content is in high level, proper nitrogen, phosphorus and potassium application is still necessary. The experiment data proved that nitrogen over application will cause bad effect on fruit yield and fruit quality. The proper amount of nitrogen apprication improve peach trees'growth. The proper amount of nitrogen apprication can both get higher fruit yield and better fruit quality. 100kg/hm~2 of nitrogen applied rate can improve the peach growth and get the highest yield in the expriment. And SSC/TA has significantly improved when 100kg/hm~2 of nitrogen applied. Mmulti-point and multi-species fertilizer experiment of peach orchard proved that the optimum fertilizer can reduce fertilizer inputs. Mmulti-point and multi-species fertilizer experiment of peach orchard proving that reduce the amount of fertilizer inputs has no significant effects on fruit quality and yield.