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Open AccessArticle

Husk Leaf Senescence Characteristics of Spring Maize (Zea mays L.) Cultivated in Two Row Directions and Three Plant Spacings in Northeast China

1
Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
2
College of Agronomy, Jilin Agricultural University, Changchun 130118, China
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(8), 1216; https://doi.org/10.3390/agronomy10081216
Received: 17 July 2020 / Revised: 14 August 2020 / Accepted: 15 August 2020 / Published: 18 August 2020
(This article belongs to the Special Issue Biomass Crop Production, Management, and Ecophysiology)
Row direction and plant spacing influence crop senescence. An experiment was conducted to analyze the effect of row direction and plant spacing on the husk leaf senescence. Physiological indicators related to husk leaf senescence at days after silking (DAS) 12, 22, and 40 were investigated under two row directions (east to west and south to north, abbreviated as EW and SN, respectively) and three plant patterns (single rows spaced at 65 cm, 40 cm twin rows spaced at 90 cm between the paired rows of narrow–wide rows, and 40 cm twin rows spaced at 160 cm between the paired rows of narrow–wide rows, abbreviated as SR, WN1, and WN2, respectively). Row direction affects the chlorophyll content and dehydration rate according to our results. Superoxide dismutase activity at DAS 22, catalase (CAT) activity at DS, and abscisic acid (ABA) concentrations at DAS 12, 22, and 40 were significantly affected by plant spacing. The CAT activities of WN1 and WN2 were significantly higher than those of SR, and WN2 had a lower ABA concentration than WN1 and SR. Our results suggest that row direction from SN and plant spacing from WN1 and WN2 were the suitable conditions for delaying the senescence of husk leaves of maize in the experimental site. View Full-Text
Keywords: Zea mays L.; dehydrating rate; row spacing; row orientation Zea mays L.; dehydrating rate; row spacing; row orientation
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MDPI and ACS Style

Liu, S.; Gu, Y.; Wang, X.; Li, X.; Wang, Y. Husk Leaf Senescence Characteristics of Spring Maize (Zea mays L.) Cultivated in Two Row Directions and Three Plant Spacings in Northeast China. Agronomy 2020, 10, 1216. https://doi.org/10.3390/agronomy10081216

AMA Style

Liu S, Gu Y, Wang X, Li X, Wang Y. Husk Leaf Senescence Characteristics of Spring Maize (Zea mays L.) Cultivated in Two Row Directions and Three Plant Spacings in Northeast China. Agronomy. 2020; 10(8):1216. https://doi.org/10.3390/agronomy10081216

Chicago/Turabian Style

Liu, Shengqun; Gu, Yan; Wang, Xiaobo; Li, Xiangnan; Wang, Yang. 2020. "Husk Leaf Senescence Characteristics of Spring Maize (Zea mays L.) Cultivated in Two Row Directions and Three Plant Spacings in Northeast China" Agronomy 10, no. 8: 1216. https://doi.org/10.3390/agronomy10081216

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