Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (6): 1339-1346.DOI: 10.3969/j.issn.1004-1524.20230473

• Environmental Science • Previous Articles     Next Articles

Effects of intercropping of maize varieties on soil aggregate composition and stability

Reihanguli KADIR(), LIU Wenli, ZHOU Yinuo, XU Chong, MA Xin, WU Jinggui, LI Jianming*()   

  1. Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China
  • Received:2023-04-10 Online:2024-06-25 Published:2024-07-02

Abstract:

In order to elucidate the effects of intercropping of maize varieties on soil aggregate composition and stability, a two-year field experiment was conducted. The root mass density (RMD), root length density (RLD), and soil aggregate indexs [>0.25 mm aggregates content (R>0.25), mean weight diameter (MWD), geometric mean diameter (GMD)] under different treatments [T1, one cultivar monoculture; T2, two-cultivar intercropping; T3, three-cultivar intercropping; T4, four-cultivar intercropping] were determined. It was shown that compared to monoculture, intercropping of maize varieties increased RMD, RLD, MWD, GMD and R>0.25. Compared with the T1 treatment, the RMD under T2, T3, T4 treatments was significantly (P<0.05) increased by 232%, 657%, 702%, respectively; the RLD was significantly increased by 515%, 1 508%, 1 531%, respectively; the R>0.25 determined by dry sieving method was significantly increased by 0.65, 0.89, 1.02 percentage points; the MWD determined by dry sieving method was significantly increased by 7.2%, 10.7%, 15.7%, respectively; the GMD determined by dry sieving method was significantly increased by 13.1%, 21.1%, 31.9%, respectively; the R>0.25 determined by wet sieving method was significantly increased by 4.34, 9.42, 11.81 percentage points; the MWD determined by wet sieving method was significantly increased by 19.6%, 41.2%, 54.9%, respectively; the GMD determined by wet sieving method was significantly increased by 27.0%, 64.9%, 87.8%, respectively. In conclusion, intercropping of maize varieties could enhance the particle size distribution of soil aggregates and their stability by increasing root characteristics, such as root mass density and root length density.

Key words: intercropping, root property, soil aggregate

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