TY - JOUR
T1 - Impact of plastic sheet mulching on grain Zn concentration, P/Zn ratio and Zn uptake in dryland grown winter wheat
AU - Hui, Xiaoli
AU - Luo, Laichao
AU - Huang, Donglin
AU - Huang, Ming
AU - Wang, Sen
AU - Palta, Jairo A.
AU - Wang, Zhaohui
N1 - Funding Information:
This work was supported by the National Key Research and Development Program of China ( 2018YFD0200401 ), the China Agricultural Research System ( CARS-3 ), and the Special Fund for Agro-scientific Research in the Public Interest ( 201303104 ). We also thank Prof. Zhiqiang Gao, Min Sun, Yinghe Xie, Tingliang Li, Shouxi Chai, Lei Chang and Qinglin Lu and Yulong Bai for their field experiment assistance and technique support.
Publisher Copyright:
© 2022
PY - 2022/11/1
Y1 - 2022/11/1
N2 - High yield and grain quality are the targets in wheat production. Plastic sheet mulching has improved wheat grain yield in under dryland agriculture, but its impact on grain quality, particularly grain zinc (Zn) concentration is not well known. Seven-site field experiments were conducted during 2014–2016 on drylands of three provinces in the Loess Plateau of China to examine the effect of plastic sheet mulching on wheat grain Zn concentration under different N applications. A split-plot design was adopted with the two main plots (no mulching and plastic sheet mulching) and the subplots with different N application rate. Measurements of Zn uptake, Zn remobilization, Zn distribution to the grain and bioavailability were made, together with biomass, yield and yield components. Study found plastic sheet mulching reduced the grain Zn concentration, and increased the molar ratio of P/Zn, decreasing the Zn bioavailability. Plastic sheet mulching also increased the aboveground Zn accumulation at anthesis by 14.4 %, the straw Zn accumulation at maturity by 14.8 % and the Zn remobilization to the grain by14.2 % but did not affect the availability of soil Zn. For each 100 kg N ha−1 applied under plastic sheet mulching, the grain Zn concentration, the Zn requirement, the aboveground Zn accumulation and remobilization to the grain increased by 3.6 mg kg−1, 2.8 g Mg−1, 6.6 g ha−1 and 3.8 g ha−1, respectively. Aboveground Zn accumulation at maturity and post-anthesis Zn uptake varied with N rates in a linear-plus-plateau model. The reduction in post-anthesis Zn uptake and Zn harvest index were the factors leading to the decrease in grain Zn concentration under plastic sheet mulching. Consequently, under plastic sheet mulching, a rational N fertilizer strategy should be considered to improve the grain Zn concentration in wheat grown in dryland.
AB - High yield and grain quality are the targets in wheat production. Plastic sheet mulching has improved wheat grain yield in under dryland agriculture, but its impact on grain quality, particularly grain zinc (Zn) concentration is not well known. Seven-site field experiments were conducted during 2014–2016 on drylands of three provinces in the Loess Plateau of China to examine the effect of plastic sheet mulching on wheat grain Zn concentration under different N applications. A split-plot design was adopted with the two main plots (no mulching and plastic sheet mulching) and the subplots with different N application rate. Measurements of Zn uptake, Zn remobilization, Zn distribution to the grain and bioavailability were made, together with biomass, yield and yield components. Study found plastic sheet mulching reduced the grain Zn concentration, and increased the molar ratio of P/Zn, decreasing the Zn bioavailability. Plastic sheet mulching also increased the aboveground Zn accumulation at anthesis by 14.4 %, the straw Zn accumulation at maturity by 14.8 % and the Zn remobilization to the grain by14.2 % but did not affect the availability of soil Zn. For each 100 kg N ha−1 applied under plastic sheet mulching, the grain Zn concentration, the Zn requirement, the aboveground Zn accumulation and remobilization to the grain increased by 3.6 mg kg−1, 2.8 g Mg−1, 6.6 g ha−1 and 3.8 g ha−1, respectively. Aboveground Zn accumulation at maturity and post-anthesis Zn uptake varied with N rates in a linear-plus-plateau model. The reduction in post-anthesis Zn uptake and Zn harvest index were the factors leading to the decrease in grain Zn concentration under plastic sheet mulching. Consequently, under plastic sheet mulching, a rational N fertilizer strategy should be considered to improve the grain Zn concentration in wheat grown in dryland.
KW - Grain Zn nutrition
KW - Soil available Zn
KW - Zn bioavailability
KW - Zn requirement
KW - Zn uptake and remobilization
UR - http://www.scopus.com/inward/record.url?scp=85138138734&partnerID=8YFLogxK
U2 - 10.1016/j.fcr.2022.108681
DO - 10.1016/j.fcr.2022.108681
M3 - Article
AN - SCOPUS:85138138734
SN - 0378-4290
VL - 288
JO - Field Crops Research
JF - Field Crops Research
M1 - 108681
ER -