Changes in Nitrogen Pools in the Maize–Soil System after Urea or Straw Application to a Typical Intensive Agricultural Soil: A <sup>15</sup>N Tracer Study

Jie Zhang; Ping He; Dan Wei; Liang Jin; Lijuan Zhang; Ling Li; Shicheng Zhao; Xinpeng Xu; Wei Zhou; Shaojun Qiu

doi:10.3390/agronomy11061134

Agronomy (Jun 2021)

Changes in Nitrogen Pools in the Maize–Soil System after Urea or Straw Application to a Typical Intensive Agricultural Soil: A <sup>15</sup>N Tracer Study

Jie Zhang,
Ping He,
Dan Wei,
Liang Jin,
Lijuan Zhang,
Ling Li,
Shicheng Zhao,
Xinpeng Xu,
Wei Zhou,
Shaojun Qiu

Affiliations

Jie Zhang: College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071000, China
Ping He: Key Laboratory of Plant Nutrition and Fertilizers, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Dan Wei: Institute of Plant Nutrient and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Liang Jin: Institute of Plant Nutrient and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Lijuan Zhang: College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071000, China
Ling Li: China Agricultural Science and Technology Press, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Shicheng Zhao: Key Laboratory of Plant Nutrition and Fertilizers, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Xinpeng Xu: Key Laboratory of Plant Nutrition and Fertilizers, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Wei Zhou: Key Laboratory of Plant Nutrition and Fertilizers, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Shaojun Qiu: Key Laboratory of Plant Nutrition and Fertilizers, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China

DOI: https://doi.org/10.3390/agronomy11061134
Journal volume & issue: Vol. 11, no. 6
p. 1134

Abstract

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A maize pot experiment was conducted to compare the difference of N distribution between bulk and rhizospheric soil after chemical fertilizer with or without soil straw amendment at an equivalent N rate using a 15N cross-labeling technique. Soil N pools, maize N and their 15N abundances were determined during maize growth. The urea plus straw treatment significantly (p p p p < 0.05) decreased the concentration and percentage of applied N as microbial biomass N (MBN) in the urea plus straw treatment. Overall, straw N was an important N source and combined application of chemical fertilizer with straw increased soil fertility, with the rhizosphere regulating the transformation and supply of different N sources in the soil–crop system.

Published in Agronomy

ISSN: 2073-4395 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Agriculture
Website: http://www.mdpi.com/journal/agronomy

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