A study of effect of fertilizer application methods on uptake of N and P by rape using tracer technique

Zhang Qinzheng

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A study of effect of fertilizer application methods on uptake of N and P by rape using tracer technique

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- A study of effect of fertilizer application methods on uptake of N and P by rape using tracer technique
- NUCLEAR TECHNIQUES Issue 9, (1995)
- 作者机构：
  
  1. 浙江农业大学原子核农学研究所
  2. 温州市农业局
  3. 温州农业学校
  4. 温州市农业科学研究所
  5. 浙江农业大学原子核农学研究所温州市农业局温州农业学校温州市农业科学研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： S14-33
- Published：01 September 1995
- 稿件说明：
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[1]张勤争,徐和昆,吴中,杨加富,孙志豪.用示踪技术研究不同施肥方法对油菜吸收利用氮、磷的影响[J].核技术,1995(09):573-576.

Zhang Qinzheng. A study of effect of fertilizer application methods on uptake of N and P by rape using tracer technique[J]. Nuclear techniques, 1995, (9).
[1]张勤争,徐和昆,吴中,杨加富,孙志豪.用示踪技术研究不同施肥方法对油菜吸收利用氮、磷的影响[J].核技术,1995(09):573-576. DOI：

Zhang Qinzheng. A study of effect of fertilizer application methods on uptake of N and P by rape using tracer technique[J]. Nuclear techniques, 1995, (9). DOI：

摘要

利用同位素１５Ｎ和３２Ｐ标记肥料研究了尿素的施用方法和磷肥的施用位置对油菜吸收利用肥料Ｎ、Ｐ的影响．１５Ｎ－尿素在苔期和花期作为追肥分别以表施、１％水溶液灌浇和表施后灌浇９９倍水三种方式施用，其测定结果表明全株对尿素氮的回收率分别为２４．４４％、３２．１５％和２７．３８％，籽粒对尿素氮的利用率分别为１３．１１％、２１．７７％和１５．９４％，处理间差异均极显著，表明尿素以兑水灌浇吸收利用率最高．３２Ｐ标记磷肥在油菜苗期分别作４ｃｍ深条施、４ｃｍ深条施和４ｃｍ深穴施，标记后８３无油菜植株吸收的３２Ｐ分别为应用量的７．０４％、８．２４％和６．５６％。

Abstract

Pot expriments were conducted to investigate the effect of application method of urea and placement of phosphates on uptake and utilization of N and P from fertilizer by rape. 15N-urea was applied at bolting and flowering stages by surface broadcast （B）

1% solution （J） and surface broadcast followed by watering （BJ）. Recoveries of applied N from mature plants were 24.44%

32.15% and 27.38% respectively

and utilization of urea-N by seeds were 13.11%

21.77% and 15.94% respectively.32P-Ca（H2PO4）2 was applied at seedling stage and the labelled fertilizer was placed in band with 2cm and 4cm depth and hole with 4cm depth

respectively.32P absorbed by plants 83 days after labelling were 7.04%

8.24% and 6.56% respectively.

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