Effects of different fertilization patterns on nutrient supply of aquic brown soil rice field and nutrient allocation in rice plant
不同施肥模式下潮棕壤稻田的速效养分状况和水稻的养分分配

A field experiment was conducted on an aquic brown soil rice field in the lower reach of Liaohe River plain to study the effects of different fertilizations on soil nutrient supply and rice plant nutrient allocation. The results showed that under fertilization, the capability of nutrient supply and the quantitative variation of available nutrients except N were higher and greater in 0-20 cm than in 20-40 cm soil layer. A combined application of inorganic and organic fertilizers was more beneficial to the enhancement of soil nutrient supply. The absorbed N and P by rice plant were mainly allocated in rice grain, while absorbed K was mainly in the stalk. Returning rice stalk into field could relax soil K shortage, maintain soil K pool, decrease K input, and reduce agricultural production cost or mitigate environmental pollution.