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

Zhang, X and Hu, B and Wang, S and Dong, W and Gopalakrishnan, S and Jin, T and Liu, E (2022) Response of the Fate of In-Season Fertilizer Nitrogen to Plastic Mulching in Rainfed Maize Croplands of the Loess Plateau. Plants (TSI), 11(18) (2343). pp. 1-11. ISSN 2223-7747

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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.

Item Type:	Article
Divisions:	Research Program : Asia
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Plastic mulch, Fertilizer nitrogen recovery, Soil nitrogen, Nitrogen concentration in organ
Subjects:	Others > Maize
Depositing User:	Mr Ramesh MNR
Date Deposited:	13 Sep 2022 07:20
Last Modified:	13 Sep 2022 07:22
URI:	http://oar.icrisat.org/id/eprint/12008
Official URL:	https://doi.org/10.3390/plants11182343
Projects:	UNSPECIFIED
Funders:	This work was supported by the National Natural Science Foundation of China (grant no. 31961143017), the National Key R&D Program of China (grant no. 2021YFE0101300), Shandong Province major scientific and technological innovation project (grant no. SD201
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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