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水分、磷肥耦合对小麦各生育期土壤中氮磷养分的影响

The Dynamic Changes of NO3--N,NH4+-N and P in Soil on Conditions of Water Situation,Different Amounts and Depths of Papplied

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【作者】 刘文菊李美茹赵全利李科江张西科刘微

【Author】 LIU Wen-ju~1,LI Mei-ru~2,~()ZHAO Quan-li~1,LI Ke-jiang~3,ZHANG Xi-ke~1,LIU Wei~1(1.College of Resource and Environmental Science,Agricultural University of Hebei,Baoding 071001,China;2.Normal School of Langfang in Hebei Province,Langfang 065000,China;3.Dryland Farming Insititute of Hebei Academy of Agriculture and Forestry Sciences,Hengshui 053000,China)

【机构】 河北农业大学资环学院河北廊坊师专生物系河北省农林科学院旱作所河北农业大学资环学院 河北保定071001河北廊坊065000河北保定071001河北衡水053000

【摘要】 通过田间试验,研究了施磷量、施磷深度和不同水分条件对冬小麦不同生育期土壤中氮、磷养分含量的影响。结果表明,在3种处理条件下,土壤中NO3-_N随小麦各生育期对氮素需求量而变化,在返青期和灌浆期,其在土壤中的含量均出现最低谷;土壤中的NH4+_N的含量在孕穗期出现高峰,其他生育期含量变化无明显影响;同样,土壤中有效磷含量在返青期和灌浆期出现低谷,而拔节或孕穗期达到高峰。根据土壤中氮磷养分的动态变化,推荐整个生育期灌水2次,施磷量及施磷深度分别为225 kg/hm2和30 cm。

【Abstract】 In the field experiment,the effect of different amounts and depths of P applied and water conditions on N and P concentrations in soil during different period of winter wheat were studied.The results showed that the concentrations of NO-3~--N changed with N-uptke by winter wheat in different growing period,the concentrations of NO-3~--N was lower at both reviving stage and filling stage.Water situation and the rate of fertilizer-P applied had no significant effect on the concentrations of NH-4~+-N except for booting stage;The contents of available P had some correlation with uptake of N and P in every period of winter wheat.

【关键词】 冬小麦
【Key words】 Winter WheatNO-3~--NNH-4~+-NAvailable P
【基金】 河北省科技厅攻关项目
  • 【文献出处】 华北农学报 ,Acta Agriculturae Boreali-Sinica , 编辑部邮箱 ,2006年S2期
  • 【分类号】S512.1
  • 【被引频次】12
  • 【下载频次】298
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