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In situ evaluation of stalk lodging resistance for different maize (Zea mays L.) cultivars using a mobile wind machine

文献类型： 外文期刊

作者： Wen, Weiliang 1 ; Gu, Shenghao 1 ; Xiao, Boxiang 1 ; Wang, Chuanyu 1 ; Wang, Jinglu 1 ; Ma, Liming 1 ; Wang, Yongjian; 1 ;

作者机构： 1.Beijing Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

2.Natl Engn Res Ctr Informat Technol Agr, Beijing Key Lab Digital Plant, Beijing 100097, Peoples R China

关键词： Failure wind speed; Cumulative lodging index; Maize (Zea mays L.); Mechanical properties; Lodging resistance; Wind machine

期刊名称：PLANT METHODS （ 影响因子：4.993； 五年影响因子：5.312 ）

ISSN：

年卷期： 2019 年 15 卷 1 期

页码：

收录情况： SCI

摘要： Background: Stalk lodging is an impediment to improving profitability and production efficiency in maize. Lodging resistance, a comprehensive indicator to appraise genotypes, requires both characterization of mechanical properties in laboratory and investigation of lodging percentage in field. However, in situ characterization of maize lodging resistance still remains poor. The aim of this study was to develop an indicator, named cumulative lodging index (CLI), based on lodging percentages at different wind speeds for evaluating lodging resistance for different maize cultivars, and to evaluate the accuracy and reliability of this method. Results: Different cultivars showed different patterns of lodging percentage along with wind speeds. The failure wind speed (FWS) for maize ranged between 16 and 30 m s(-1) across cultivars. The CLI differed between maize cultivars and showed favorable reliability (i.e. nRMSE of 5.38%). Mechanical properties of the third internode did not vary significantly between cultivars. Significant differences in the reduction index (RI) of wind speed sheltered by maize canopy were found between cultivars. Conclusion: Our findings implied that mobile wind machine is powerful in reproducing wind disaster that induce crop lodging. The newly-built CLI was demonstrated to be a more robust indicator than mechanical properties, FWS, and RI when evaluating lodging resistance in terms of both reliability and resolution. This study offers a new perspective for evaluating in situ lodging resistance of crops, and provides technical support for accurate identification of lodging-resistant phenotypic traits.

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