【摘要】 本文采用¹⁵N-硫铵、¹⁵N-菜桔单施,两者交叉标记配施处理。于水稻不同生育期研究了肥料氮在土壤及稻株中的运转、分配,菜桔氮的矿化率和硫铵氮的固定率,土壤生物量——碳、氮的变化,阐明了有机肥菜桔与无机肥硫铵配施的优越性。更多还原

【Abstract】 The ¹⁵N labelled ammonium sulfate or rape residues applied alone, and ammonium sulfate and rape residues in combined application （crosswise tagged） were studied. The experiment dealt with the transformation and distribution of fertilizer ¹⁵N in the soil and rice plant at different stage of the rice growth. The mineralization rate of organic N, the f’xation rate of inorganic N and the variation of soil biomass were also discussed.It has been well lllustrated that the combined fertilization has many advantages.更多还原