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| Effects of Nitrate and Ammonium Nitrogen on the Accumulation and Distribution of Imidacloprid in Maize Seedlings |
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| DOI：10.16768/j.issn.1004-874X.2022.01.002 |
| Author Name | Affiliation | | HE Qin1,2, ZHANG Xingxing2
, LAI Jiantian1,2, SHAO Danqing1,3,
ZHOU Yuming1
, SHEN Jianmei1
, LU Yinglin2
, AN Yuxing2 | |
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| Abstract: |
| 【O bjective】The study is carried out to explore the accumulation and distribution law of
imidacloprid in maize under different nitrogen supply conditions, which will provide a theory foundation for improving imidacloprid utilization rate and rational application of nitrogen fertilizer and imidacloprid.【Method】
T he seedlings of maize was exposed to imidacloprid in hydroponic solution with different nitrogen treatments
(4 mmol/L NO3-
, 10 mmol/L NO3-
, 4 mmol/L NH4+
, 10 mmol/L NH4+
). The content of imidacloprid in maize was
determined by HPLC.【Result】Leaf was the main part for imidacloprid accumulation in maize, followed by
root and stem, and all nitrogen treatments showed similar accumulation law. The imidacloprid accumulation was
closely related with nitrogen forms in maize under different imidacloprid concentrations. Under the treatments of
3 imidaclo prid concentrations, the content of imidacloprid in the roots, stems and leaves of maize cultured with
NO3-
as the nitrogen source was significantly higher than that of maize cultured with NH4+
. For example, when
the imidacloprid concentration was 2.5 mg/L, the contents of imidacloprid in roots of NO3-
treatment were 3.09
and 5.15 times those of NH4+
treatment, respectively, 1.90 and 3.04 times those in stems, and 1.70 and 3.22 times
those in leaves, respectively. When the imidacloprid concentration was 5.0 mg/L, the TFleaf/stem of imidacloprid in
maize seedlings was the highest, and that of NO3-
and NH4+
treatments was 7.54, 5.07, 4.19 and 4.13 respectively,
indicating that NO3-
was more beneficial to imidacloprid transportation from stems to leaves. Compared with
NO3-
treatments, the TFleaf/stem of imidacloprid in maize seedlings of NH4+
treatments was significantly lower,
indicating that NO3-
was more beneficial to imidacloprid transportation to leaves under 5.0 mg/L imidacloprid
treatment.【Conclusion】The accumulation of imidacloprid in maize seedlings was correlated with addition
dose of imidacloprid, the higher the concentration of imidacloprid in culture solution, and higher imidacloprid
accumulation in maize. The accumulation of imidacloprid in maize seedlings was influenced by the nitrogen form,
and NO3-
is more beneficial to the accumulation of imidacloprid in maize. |
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