Crops ›› 2025, Vol. 41 ›› Issue (1): 227-234.doi: 10.16035/j.issn.1001-7283.2025.01.029

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Effects of Intercropping Flue-Cured Tobacco and Maize on Rhizosphere Soil Nutrients and Crop Growth

Ma Junmei1(), Dou Min2, Liu Di1, Yang Xiuhua1, Yang Yong2, Nian Fuzhao1, Liu Yating1, Li Yongzhong1()   

  1. 1College of Tobacco Science, Yunnan Agricultural University, Kunming 650201, Yunnan, China
    2College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, Yunnan, China
  • Received:2023-11-19 Revised:2023-12-25 Online:2025-02-15 Published:2025-02-12

Abstract:

To clarify the impact of root system interaction on soil nutrients after intercropping flue-cured tobacco and maize, a pot planting method was adopted. Choosing flue-cured tobacco variety K326 and maize varieties Yunrui 319 (silage maize) and Haniks (fresh maize) for intercropping, the effects of intercropping flue-cured tobacco and maize on soil nutrients and the growth of flue-cured tobacco and maize were explored. The results showed that compared with flue-cured tobacco monoculture, intercropping maize with flue-cured tobacco increased the pH, organic matter, available phosphorus content, as well as the activities of sucrase and acid phosphatase in the rhizosphere soil of tobacco. There was a significant positive correlation between acid phosphatase activity in the rhizosphere soil of flue-cured tobacco and pH, organic matter content, and a significant positive correlation between tobacco agronomic traits and rhizosphere soil nutrients. After intercropping maize and flue-cured tobacco, the enzyme activity in the maize rhizosphere soil significantly increased, and the soil pH, alkaline nitrogen, and available phosphorus content increased. There was a strong positive correlation between enzyme activity in maize rhizosphere soil and soil nutrients and leaf photosynthesis. Maize agronomic traits and dry matter accumulation were closely related to rhizosphere soil nutrients. In summary, intercropping flue-cured tobacco and maize has increased the content of soil available nutrients to varying degrees, enhanced the enzyme activity related to rhizosphere soil nutrients, and promoted the growth of flue-cured tobacco and maize.

Key words: Flue-cured tobacco, Maize, Intercropping, Soil enzyme activity, Soil nutrients, Leaf photosynthesis

Table 1

Treatments with different planting patterns"

处理Treatment 种植模式Planting pattern
KD K326单作
KYJ K326与云瑞319间作
KHJ K326与哈尼克斯间作
YD 云瑞319单作
HD 哈尼克斯单作

Fig.1

Effects of intercropping flue-cured tobacco and maize on enzyme activity in rhizosphere soil “*”,“**”,“***”indicate significant difference at P < 0.05, P < 0.01, and P < 0.001 levels, respectively, the same below."

Fig.2

Effects of intercropping flue-cured tobacco and maize on the physicochemical properties of rhizosphere soil"

Fig.3

Correlation between physicochemical properties and enzyme activities of rhizosphere soil in intercropping flue-cured tobacco and maize S-SC: soil sucrase; S-UE: soil urease; S-CAT: soil catalase; S-ACP: soil acid phosphatase; OM: organic matter; AN: alkali nitrogen; AP: available phosphorus; AK: available potassium. “*” indicates significant correlation at P < 0.05 level, “**” indicates extremely significant correlation at P < 0.01 level. The same below."

Fig.4

Effects of intercropping on photosynthetic parameters of flue-cured tobacco and maize leaves"

Fig.5

Correlation between leaf photosynthesis and enzyme activity in intercropping flue-cured and maize"

Fig.6

Effects of intercropping between flue-cured tobacco and maize on agronomic characteristics and dry weight of maize per plant"

Fig.7

Correlation between agronomic traits, dry matter accumulation, nutrients, and photosynthesis in intercropping flue-cured tobacco and maize"

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