Maize-Soybean Strip Intercropping Improved Lodging Resistance and Productivity of Maize

文献类型： 外文期刊

第一作者： Chen, Xifeng

作者： Chen, Xifeng;Gu, Yan;Liu, Yaliang;Li, Jianfeng;Wu, Chunsheng;Wang, Zhenmin;Sun, Ning

作者机构：

关键词： Maize-soybean strip intercropping; Sole cropping; Stem characters; Root architecture; Lodging resistance

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2020 年 24 卷 5 期

页码：

收录情况： SCI

摘要： Maize yield is limited by lodging, which increases with increased planting density. The aim of this study was to assess whether lodging could be reduced by changing the planting density through intercropping maize with soybean. Therefore, this study was conducted to evaluate the effects maize-soybean strip intercropping, compared with sole cropping of maize, on stem and root characters, lodging resistance and yield of maize Maize was sown in strips intercropping as: M2S2 (maize-soybean intercropping with 2 row strips of each), M4S2 (maize-soybean intercropping with 4 row strips of maize and 2 row strips of soybean), M4S4 (maize-soybean intercropping with 4 row strips of maize and soybean) and M6S6 (maize-soybean intercropping with 6 row strips of maize and soybean) taking sole maize (M) and sole soybean (S) as control. Compared with its traditional sole cropping, maize-soybean strip intercropping changed the stem characteristics and root architecture of maize populations and significantly improved the lodging resistance. Specifically, plant height, ear height, and center of gravity height of strip intercropped maize was significantly lower; and stem diameter, average stalk crushing strength, and lodging resistance index of each node below the ear level were higher than that of sole cropping. The internode diameter, internode unit fresh matter weight, internode crushing strength, and internode unit bending force of stem internodes (2-10) of strip intercropped maize were higher than that of its sole cropping. Nodes 3-6 affected the lodging resistance of plants, and bar intercropping significantly enhanced the lodging resistance of the above key node positions. Morphological and physiological indexes of the intercropped maize roots were significantly higher than that of sole cropped maize and were positively correlated with stalk resistance index but negatively correlated with lodging rate. The composite yield of crops under different strip intercropping systems was in order as M4S2 > M > M4S4 > M6S6 > M2S2. Moreover, the land equivalent ratio (LER) of all the strip intercropping treatments was greater than 1.0. In conclusion, strip intercropping of maize with soybean seemed an effective and novel way to resolve lodging in maize coupled with its higher yield. (C) 2020 Friends Science Publishers

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