用^(15)N示踪技术研究高产小麦、玉米的施氮规律  

STUDIES ON UTILIZATION OF NITROGEN BY WHEAT AND MAIZE WITH 15 N TRACER METHOD

作　　者：茹德平[1] 赵彩霞[1] 李习军[1] 李青松[2] 赵治军[1] 

机构地区：[1]河南省新乡市农业科学院,河南新乡453003 [2]河南农业大学,河南郑州452002

出　　处：《核农学报》2005年第2期151-154,共4页Journal of Nuclear Agricultural Sciences

摘　　要：利用稳定性同位素15N示踪技术 ,探索小麦、玉米在高N施肥下的N素营养规律。结果表明 :小麦、玉米对追加15N化肥的吸收利用率为 2 8 42 %～ 46 2 8% ,向籽粒运转量为 5 4 %～68% ,追施N的有效期可连续 3茬作物 ,累计利用率为 5 2 0 7%～ 60 39%。在较高土壤肥力基础上 ,小麦、玉米年产量达 1 5 0 0 0kg hm2 ,小麦最佳氮肥施量为 1 5 0～ 1 87 5kg hm2 ,玉米为 30 0～375kg hm2 。The characteristics of nitrogen fertilizer on wheat and maize were investigated by 15 N tracer method. The results showed that the assimilation and transportation efficiency of available nitrogen is 28.42%～46.28%, 54%～68% of which is in grain. The effectiveness of applied nitrogen can sustain three crops. The accumulated utilizing rate is 52.07%～60.39%. In higher level of soil fertility, the yield of wheat, maize up to 15000 kg/hm 2, the best nitrogen fertilizer applying quantity is 150～187.5 kg/hm 2 for wheat and 300～375 kg/hm 2 for maize.

关 键 词：^15N示踪技术 玉米 高产小麦 施氮 稳定性同位素 吸收利用率 营养规律 土壤肥力 有效期 年产量 N素 施肥 籽粒 作物 追施 施量 

分 类 号：S147[农业科学—肥料学]