Meta-analysis on Effect of Chemical Regulation on Maize Yield in China
1 Anhui Academy of Agricultural Sciences/Maize research center, Hefei, 230001
2 Henan Agricultural University/Agricultural college, Zhengzhou, 450046
Field Crop, 2020, Vol. 3, No. 9
Received: 16 Aug., 2020 Accepted: 20 Aug., 2020 Published: 20 Aug., 2020
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This article was first published in Molecular Plant Breeding ( ISSN1672-416X，CN46-1068/S) in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Aiming at analyzing the effect of chemical regulation on maize yield in China, this study was conducted comparing with water-sprayed field. A total of 25 papers were searched and selected from published papers, including 78 available comparisons grouped by province, testing time, maize type, planting density, chemical regulator type, spraying amount and spraying period. Meta-analysis was employed to make quantitative research on effect of chemical regulation on maize yield in China and affecting factors. Results: By using chemicla regulation, maize yield could be increased effectively, average increasing yield being 570.489 kg/hm2 with no publication bias and no extreme values (95% confidence interval of 413.595-727.382 kg/hm2). If compact maize are planted in high density and sprayed with low-concentration chemical regulator in panical stage, the yield increasing effect by chemical regulation will be enhanced. This study could work as a reference for applicaiton of chemical regulation.
Chemical regulation; Chemical regulatorl; Maize; Meta-analysis; Yield effect
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