The Research On Rice Fertilizer Efficiency Of Shangrao

In order to understand the Shangrao Rice fertilization law. improve fertilizer use efficiency and rice production.The reaserch mainly analyzed the effects of different soil types、landform types、fertilization levels on fertilizer use efficiency and yield of rice by the3414fertilizer field trial which were conductde from2005to2010in Shangrao.and on this basis, combined with GIS technology to draw the spatial distribution of fertilizer use efficiency of rice under various influencing factors. Results are as follows:1Different soil types due to the different developmental conditions, fertility and uneven, resulting in the utilization of rice fertilizer on different soil types there was a significant difference. The Shangrao different types of soil NPK fertilizer use efficiency utilization level is different:hydromorphic red sand claey soil is the hingest,then are hydromorphic tidal field sand claey soil,hydromorphic eel clayey soil, hydromorphic gray-red sand clay soil, hydromorphic gray tidal field sand claey soil, hydromorphic gray yellow claey soil. hydromorphic gray eel clayey soil, hydromorphic black red sand clay-soil, hydromorphic black tidal field sand claey soil, hydromorphic black yellow claey soil, hydromorphic black eel clayey soil.2Different fertilization levels of the main factors affecting fertilizer use efficiency and yield of rice.With the increase of NPK application, rice, fertilizer utilization is declining trend and rice yield showing a drop in the first and second parabolic trend, in which nitrogen is greatest impact, followed by phosphorus and potassium.3The NPK fertilizer seasonal utilization of the order on the the Shangrao different landform types are mountain> hilly>plains, but no significant differences between the three, while rice production is the opposite.4Reasonable and appropriate amount of NPK combined application can significantly improve the utilization and yield of rice fertilizer. Testing and fertilizer and conventional fertilizer treatments of nitrogen, phosphorus, potash fertilizer utilization were increased by3.95%,2.92%,9.46%, formula fertilization and conventional fertilization respectively, compared with blank control increased by45.81%,57.33%. 5Rice fertilizer utilization level is inversely proportional to soil fertility, because the nutrient-supply capacity of low produtivity fields are softer,fertilizer use efficiency is lowe;high productivity fields go by contraries. But the level of rice yield is proportional to soil fertility.6The NPK fertilizer seasonal utilization of Shangrao averaged36.86%,18.86%.43.89%, compared with the province’s average level of fertilizer use efficiency, nitrogen use efficiency is high, P and K utilization is lower than the provincial average. Regional fertilizer utilization rate in descending order is Southwest> Southeast> Northwest> northern> Central.