As a water-saving cultivation technique, the ridge-furrow with plastic film mulching (RF) system has been a popular planting strategy and has been generally promoted to raise crop yields. However, the effect of the RF system on the susceptibility of maize to lodging is inconclusive. A two-year field experiment, with three planting practices (FP: rain-fed flat planting, TI: traditional irrigation planting and RF) in coupled with two nitrogen (N) application rates (225 and 75 kg N ha⁻¹) and two maize (Zea mays L.) cultivars (Zhengnong9 and Zhengdan958), was established to evaluate the risk of lodging under RF and identify how the RF system affects maize lodging. The results revealed that lodging susceptibility had a significantly positive relationship with grain yield (r (coefficient of correlation between lodging rate and grain yield) = 0.36* and 0.79** in 2013 and 2014, respectively), and our previous studies have showed that the maize yield of RF system was significantly higher than the FP practice, suggesting that the RF system increased the lodging risk of maize compared to the FP practice. However, compared with TI, RF decreased plant height, length and centre of gravity height of the basal third internode and improved the stalk bending resistance strength of the basal third internode, leading to significantly increase in the stalk lodging resistance index and reductions in the lodging rate with a simlar grain yield. In summary, RF strategy can be as a hopeful system for summer maize cuiltivation in dry semi-humid areas. High N application rates decreased lodging rate regardless of the plant pattern or cultivar in two years. The lodging rate of Zhengdan958 was significantly higher than that of Zhengnong9. The redundancy analysis showed that plant height, length and stalk bending resistance strength of the basal third internode and centre of gravity height were the vital factors that affected maize lodging, explaining more than 70 % of the total variation in the lodging rate. The plant height, length of the basal third internode and centre of gravity height revealed remarkable positive corrlations with the lodging rate; in addition, the stalk bending resistance strength of the basal third internode revealed remarkable negative corrlation with the lodging rate over the two years. These relationships suggest that increasing stalk strength and decreasing centre of gravity height and plant height result in higher lodging resistance and should be considered in future maize breeding programmes.

作为一种节水栽培技术，垄沟塑料膜覆盖（RF）系统已成为一种流行的种植策略，并已得到普遍推广以提高农作物的产量。但是，RF系统对玉米对倒伏敏感性的影响尚无定论。一项为期两年的田间试验，其中包括三种种植方式（FP：雨养平地种植，TI：传统灌溉种植和RF），并结合两种氮（N）的施用量（225和75 kg N ha ^-1）和两种玉米（Zea mays建立了L.）品种（Zhengnong9和Zhengdan958），以评估RF条件下倒伏的风险并确定RF系统如何影响玉米倒伏。结果表明，倒伏敏感性与谷物产量呈显着正相关（r（倒伏率与谷物产量之间的相关系数）分别在2013年和2014年分别为0.36 *和0.79 **），并且我们以前的研究表明RF系统的玉米产量显着高于FP实践，表明RF系统与FP实践相比增加了玉米的倒伏风险。然而，与TI相比，RF降低了基部第三节间的植物高度，长度和重心高度，并提高了基部第三节间的抗茎秆弯曲强度，导致秸秆抗倒性指数显着提高，而倒伏率降低，且谷物产量相似。总之，RF策略可以作为干燥半湿润地区夏季玉米栽培的理想系统。高氮肥施用量会降低倒伏率，而与植物类型或品种在两年内无关。郑单958的倒伏率明显高于郑农9。冗余分析表明，基部第三个节间的株高，长度和茎秆抗弯曲强度以及重心高度是影响玉米倒伏的重要因素，占倒伏率总变化的70％以上。株高，基部第3节间的长度和重心高度与倒伏率呈显着正相关。此外，两年内基部第三节间的茎抗弯曲强度与倒伏率之间显示出显着的负相关关系。这些关系表明，提高秸秆强度，降低重心高度和植物高度会导致较高的抗倒伏性，因此应在未来的玉米育种计划中予以考虑。