摘要
利用32P示踪技术,通过盆栽试验,研究了控释氮肥和普通尿素对杂交水稻磷的吸收、残留和土壤固定磷肥的影响。结果表明:与普通尿素相比,施用控释氮肥,明显地增加了杂交水稻在分蘖期、孕穗期、成熟期的吸磷总量以及肥料P和土壤P的吸收量。控释氮肥中,氮的释放速度和作物的需求基本一致,显著提高了杂交水稻对磷肥的利用率、回收率和残留在土壤中可被再利用的肥料磷,降低土壤对磷肥的固定。
The effects of controlled release nitrogen fertilizer（CRNF） on phosphorus absorption, residuum and fixation of hybrid rice by using ^32p tracer technique were studied. The results show that compared with urea, the application of CRNF could significantly increase the absorption of total P, phosphorous fertilizer and P in soil of hybrid rice in maximum tillering stage, booting stage and ripening stage. Release of nitrogen nutrient from the CRNF showed better effect on improving the efficiency, the reclamation radio and the residuum of phosphorous fertilizer while decreases the fixation of phosphorous fertilizer in soil.
出处
《湖南农业科学》
2006年第6期59-62,共4页
Hunan Agricultural Sciences
基金
湖南省计委项目[湘计高技(2003)776号]
关键词
控释氮肥
杂交水稻
^32P示踪
磷肥利用率
磷肥固定量
controlled release nitrogen fertilizer
hybrid rice
^32p tracer technique
the efficiency of phosphorous fertilizer
soil-fixed phosphorous
