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Natural 15N abundances of maize and soil amended with urea and composted pig manure

机译：尿素和猪粪堆肥改良玉米和土壤的天然15 N丰度

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摘要

To investigate the effect of inorganic fertilizer and composted manure amendments on the N isotope composition (delta 15N) of crop and soil, maize (Zea mays L.) was cultivated under greenhouse conditions for 30, 40, 50, 60, and 70 days. Composted pig manure (delta 15N= +13.9‰) and urea (-2.3‰) were applied at 0 and 0 kg N ha−1 (C0U0), 0 and 150 kg N ha−1 (C0U2), 150 and 0 kg N ha−1 (C2U0), and 75 and 75 kg N ha−1 (C1U1), respectively. The delta 15N of total soil-N was not affected by both amendments, but delta 15N of NH+ 4 and NO− 3 provided some information on the N isotope fractionation in soil. During the early growth stage, significant differences (P < 0.05) in delta 15N among maize subjected to different treatments were observed. After 30 days of growth, the delta 15N values of maize were +6.6‰ for C0U0, +1.1‰ for C0U2, +7.7‰ for C2U0, and +4.5‰ for C1U1. However, effects of urea and composted manure application on maize delta 15N progressively decreased with increasing growth period, probably due to isotope fractionation accompanying N losses and increased uptake of soil-derived N by maize. After 70 days of growth, delta 15N of leaves and grains of maize amended with composted pig manure were significantly (P < 0.05) higher than those with urea. The temporal variations in delta 15N of maize amended with urea and composted manure indicate that plant delta 15N is generally not a good tracer for N sources applied to field. Our data can be used in validation of delta 15N fractionation models in relation to N source inputs.
机译：为了研究无机肥料和堆肥改良剂对作物和土壤中N同位素组成（δ15 N）的影响，在温室条件下将玉米（Zea mays L.）种植了30、40、50、60 ，以及70天。在0和0 kg N ha-1（s0u0），0和150 kg N ha-1下施用堆肥猪粪（δ15 N = + 13.9‰）和尿素（-2.3‰） （C0U2），150和0 kg N ha-1 （C2U0），以及75和75 kg N ha-1 （C1U1）。两种修正均不影响土壤总氮的δ15 N，但NH + 4 和NO − 3 N均不受影响。 >提供了有关土壤中N同位素分馏的一些信息。在生育早期，观察到不同处理条件下玉米的δ15 N差异显着（P <0.05）。生长30天后，玉米的Delta 15 N值为C0U0 + 6.6‰，C0U2 + 1.1‰，C2U0 + 7.7‰，C1U1 + 4.5‰。但是，尿素和堆肥对玉米三角洲15 N的影响随着生育期的增加而逐渐降低，这可能是由于同位素分馏伴随着氮的流失以及玉米对土壤来源的氮的吸收增加。生长70天后，用肥料堆肥改良的玉米叶片和谷粒的δ15N含量显着高于（P <0.05）。用尿素和堆肥改良的玉米δ15N的时间变化表明，植物δ15N通常不是田间施用N源的良好示踪剂。我们的数据可用于验证与N个源输入有关的delta 15 N分馏模型。

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  • 来源
    《Plant and Soil》 |2002年第2期|223-232|共10页
  • 作者

    Woo-Jung Choi; Sang-Mo Lee; Hee-Myong Ro; Kyoung-Cheol Kim; Sun-Ho Yoo;

  • 作者单位

    School of Agricultural Biotechnology College of Agriculture and Life Sciences Seoul National University;

    National Instrumentation Center for Environmental Management College of Agriculture and Life Sciences Seoul National University;

    School of Agricultural Biotechnology College of Agriculture and Life Sciences Seoul National University;

    School of Agricultural Biotechnology College of Agriculture and Life Sciences Seoul National University;

    School of Agricultural Biotechnology College of Agriculture and Life Sciences Seoul National University;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    compost; maize; natural 15N abundance; urea;

    机译：堆肥;玉米;天然15N丰度;尿素;

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