Effects of different fertilization treatments on wheat root rot and the diversity of fungi in rhizosphere soil

doi:10.14088/j.cnki.issn0439-8114.2020.21.007

Abstract

Abstract: Four treatments were set up, including no fertilization （T1）, conventional fertilization （T2）, recommended fertilization （T3） and organic fertilizers replace 50% chemical fertilizers （T4）, in order to study the effect of different fertilization on the diversity of fungi and root rot of wheat rhizosphere soil. The results showed that the order of root activity of different fertilization treatments was T4, T3, T2 and T1 from big to small. The yield of recommended fertilization was 5 878.95 kg/hm²,only 66.45 kg/hm² lower than that of conventional fertilization,and 1 111.80 kg/hm² more than that of organic substitution. The use of chemical fertilizers reduced soil pH and the richness and diversity of fungal communities, which changed the structure of fungal communities. The relative abundance of Fusarium graminearum was T2, T4, T3 and T1 from large to small. The relative abundance of Bipolaris sorokiniana and the index of wheat root rot were all low in T4. Therefore, properly reducing the proportion of organic fertilizer replacing chemical fertilizer under the recommended amount of fertilizer can not only ensure the yield, but also reduce the incidence of root rot.

Key words: wheat （Triticum aestivum L.）, rhizosphere soil, fungal diversity, root rot disease

CLC Number:

LIU Dong-hai, ZHANG Xue-jiang, WANG Peng, HU Cheng, QIAO Yan, ZHANG Zhi, LI Shuang-lai. Effects of different fertilization treatments on wheat root rot and the diversity of fungi in rhizosphere soil[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(21): 30-34，50.

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