Crops ›› 2023, Vol. 39 ›› Issue (1): 170-175.doi: 10.16035/j.issn.1001-7283.2023.01.025

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Effects of Four Bacillus Species on Yield and Quality of Sweet Potato at Different Stages

Jia Zhengrong(), Hao Jiali, Hao Yanfang(), Bai Wenbin, Zhang Jianhua, Guo Ruifeng, Liu Yong   

  1. Sorghum Research Institute, Shanxi Agricultural University/Shanxi Key Laboratory of Sorghum Genetic and Germplasm Innovation, Jinzhong 030600, Shanxi, China
  • Received:2021-12-13 Revised:2022-01-04 Online:2023-02-15 Published:2023-02-22

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Abstract:

In order to investigate the effects of different types of Bacillus species on yield and quality of sweet potato, a field experiment was conducted with Sushu 16 as the test material and four types of Bacillus fungicides and control (CK) treatments were set. The results showed that the application of four different Bacillus species on the basis of conventional fertilization could increase the yield and quality of sweet potato. The yield increase of sweet potato was the largest under Bacillus subtilis treatment after planting 142 days, and the yield of the four Bacillus treatments were increased by 4.6%-25.4% compared with CK treatment. The starch accumulation of sweet potato showed a trend of increasing and then decreasing throughout the growing period, and the starch accumulation reached the maximum after planting 113 days, and the four Bacillus treatments were increased by 2.9%-16.4% compared with CK treatment, the largest increase was the treat with methylotrophic Bacillus. The soluble sugar accumulation of sweet potato showed a trend of decreasing and then increasing, and reached the maximum after planting 142 days, the four bacterial species were increased by 3.2%-34.2% compared with CK treatment, the treatment of Bacillus amyloliquefaciens was the most significant. The trend of sweet potato carotene accumulation were general consistent with crude protein content, showing an increase followed by a decrease, and reached the maximum after planting 90 days, and increased by 6.1%-29.5% and 2.8%-14.5% after planting 142 days, respectively, and the treatment of Bacillus amyloliquefaciens was the most significant. It was concluded that the application of Bacillus amyloliquefaciens had the best effects on the promotion of sweet potato yield and quality by the principal component analysis.

Key words: Bacillus, Sweet potato, Yield, Quality

Table 1

Effects of four Bacillus species on yield of sweet potato in growing period kg/hm2"

处理Treatment 70d 90d 113d 142d
枯草芽孢杆菌Bacillus subtilis 93.03±8.4a 116.11±12.6a 141.59±10.3a 154.37±6.3a
胶冻样芽孢杆菌Jelly-like Bacillus 73.83±6.2c 88.04±4.9c 104.05±8.3d 128.76±5.9d
解淀粉芽孢杆菌Bacillus amyloliquefaciens 87.96±8.8b 111.12±9.3b 133.57±4.6b 146.31±9.6b
甲基营养型芽孢杆菌Methylotrophic Bacillus 73.19±9.5c 85.24±9.7d 112.93±5.1c 133.62±10.3c
CK 58.49±6.9d 69.97±8.4e 86.36±11.2e 123.09±8.2e

Fig.1

Effects of four Bacillus species on the starch accumulation of sweet potato Different lowercase letters indicate significant difference at the 0.05 level, the same below"

Fig.2

Effects of four Bacillus species on the soluble sugar accumulation of sweet potato"

Fig.3

Effects of four Bacillus species on the crude protein accumulation of sweet potato"

Fig.4

Effects of four Bacillus species on the carotenoid accumulation of sweet potato"

Table 2

Results of principal component analysis of the effects of Bacillus species on yield and quality of sweet potato"

主成分
Principle
component		 特征值
Eigenvalue		 贡献率
Contribution
proportion (%)		 累积贡献率
Cumulative contribution
proportion (%)
1 3.0069 60.138 60.138
2 1.4893 29.785 89.923
3 0.4747 9.494 99.418
4 0.0291 0.583 100.000

Table 3

Results of the comprehensive evaluation of the effects of Bacillus species on yield and quality of sweet potato"

处理Treatment F1 F2 F 排序Sort
枯草芽孢杆菌
Bacillus subtilis		 0.3716 1.7020 0.8123 2
胶冻样芽孢杆菌
Jelly-like Bacillus		 0.9808 -1.3068 0.2230 3
解淀粉芽孢杆菌
Bacillus amyloliquefaciens		 2.1554 0.1646 1.4960 1
甲基营养型芽孢杆菌
Methylotrophic Bacillus 		-1.5012 0.4652 -0.8499 4
CK -2.0065 -1.0249 -1.6814 5
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