农业系统中磷肥残效及磷循环研究Ⅱ.磷及其他养分在作物体内分配

Residual effect of phosphorus fertilizer and phosphorus recycling in a farming system Ⅱ. Distribution of phosphorus and other nutrients in crops.

土壤P供应状况及作物生长好坏可明显影响高粱、玉米、大豆籽实及秸秆中的P浓度、P在籽实及秸秆中的分配比和形成单位籽实产量的P收获量。P供应充分,作物生长良好(产量高),籽实中的P浓度高,籽实P/秸秆P的分配比大,每形成单位籽实消费的P量高。

The concentration and distribution of P in grains and stalks of sorghum, maize and soybean and the harvested P from producing each unit of grains are markedly influenced by soil P condition and crop growing status. A better soil P supply and better crop growth can induce a higher P concentration in grain, larger ratio of grain P/stalk P and more P consumption for producing each unit of grain yields.