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Volume 11
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Article

Response of the Fate of In-Season Fertilizer Nitrogen to Plastic Mulching in Rainfed Maize Croplands of the Loess Plateau

by
Xueli Zhang
1,†,
Bin Hu
2,†,
Shangwen Wang
1,
Wenyi Dong
1,
Subramaniam Gopalakrishnan
3,
Tao Jin
4,* and
Enke Liu
1,4,*
1
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
2
Shandong Agricultural Technology Promotion Center, Jinan 250100, China
3
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502324, India
4
State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850002, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Plants 2022, 11(18), 2343; https://doi.org/10.3390/plants11182343
Submission received: 28 May 2022 / Revised: 9 July 2022 / Accepted: 21 July 2022 / Published: 8 September 2022
(This article belongs to the Special Issue Effects of Plastics in Soil-Plant System)
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Abstract

As plastic mulching is widely used for maize production on Loess Plateau, study of the fate of fertilizer nitrogen (N) in rain-fed croplands is of great significance. Field experiments were conducted during 2015–2016 at a typical dry-land farm on the Loess Plateau, China. The stable isotope tracer technique was applied to analyze the effects of plastic mulching on the maize crop yield, N content in the grain, and mechanism of N uptake and utilization in maize plants with plastic mulch (PM) and without plastic mulch (CK) on the Loess Plateau. Maize yield, aboveground dry matter, grain N concentration, and N uptake in aboveground biomass for PM significantly increased, in addition to fertilizer nitrogen recovery and nitrogen production efficiency. Compared to CK, PM improved the total N uptake from the soil in the aboveground biomass by 16.39 and 27.75 kg ha−1 and fertilizer nitrogen recovery by 10.89 and 22.02 kg ha−1, respectively. Furthermore, PM increased in-season fertilizer N retention in the soil by 11.9–24.8 kg ha−1, and the uncountable fertilizer N decreased by approximately 33.8 kg ha−1 on average. In conclusion, PM simultaneously improved the maize yield and N utilization, which provides a scientific basis for nitrogen management in maize croplands.
Keywords: plastic mulch; fertilizer nitrogen recovery; soil nitrogen; nitrogen concentration in organ plastic mulch; fertilizer nitrogen recovery; soil nitrogen; nitrogen concentration in organ

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MDPI and ACS Style

Zhang, X.; Hu, B.; Wang, S.; Dong, W.; Gopalakrishnan, S.; Jin, T.; Liu, E. Response of the Fate of In-Season Fertilizer Nitrogen to Plastic Mulching in Rainfed Maize Croplands of the Loess Plateau. Plants 2022, 11, 2343. https://doi.org/10.3390/plants11182343

AMA Style

Zhang X, Hu B, Wang S, Dong W, Gopalakrishnan S, Jin T, Liu E. Response of the Fate of In-Season Fertilizer Nitrogen to Plastic Mulching in Rainfed Maize Croplands of the Loess Plateau. Plants. 2022; 11(18):2343. https://doi.org/10.3390/plants11182343

Chicago/Turabian Style

Zhang, Xueli, Bin Hu, Shangwen Wang, Wenyi Dong, Subramaniam Gopalakrishnan, Tao Jin, and Enke Liu. 2022. "Response of the Fate of In-Season Fertilizer Nitrogen to Plastic Mulching in Rainfed Maize Croplands of the Loess Plateau" Plants 11, no. 18: 2343. https://doi.org/10.3390/plants11182343

APA Style

Zhang, X., Hu, B., Wang, S., Dong, W., Gopalakrishnan, S., Jin, T., & Liu, E. (2022). Response of the Fate of In-Season Fertilizer Nitrogen to Plastic Mulching in Rainfed Maize Croplands of the Loess Plateau. Plants, 11(18), 2343. https://doi.org/10.3390/plants11182343

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