Paenibacillus sp. Lzh-N1 Against Brown Spot Disease of Pear: Application in Bio-organic Fertilizer

doi:10.11923/j.issn.2095-4050.cjas2024-0216

Abstract

Abstract:

This study explored the control effect of bio-organic fertilizer containing Paenibacillus sp.Lzh-N1 on pear tree brown spot disease and its impact on fruit yield and quality through pot and field trials during 2021-2023.The results showed that applying the bio-organic fertilizer containing Paenibacillus sp.Lzh-N1 to pear seedlings in pot experiments reduced the incidence rate by 54.70%, decreased infected leaves by 60.58%, and significantly increased root biomass by 332%. Field experiments showed that the average single fruit weight increased by 7.01%, organic acid content decreased by 26.09%, solid content increased by 19.49%, total soluble sugar increased by 36.35%, fruit hardness decreased by 3.91%, pear yield increased by 22.02%, disease index of brown spot disease of pear decreased by 33.33%, and control effect on brown spot disease was 31.04%. Comprehensive analysis indicated that the bio-organic fertilizer containing Paenibacillus sp. Lzh-N1 can effectively prevent and control the occurrence of brown spot disease of pear, improve the quality and yield of pear, and have the advantages of non-toxicity, high efficiency and environmental friendliness. The study provides a scientific basis for green prevention and control of pear tree diseases and industrial development.

Key words: pear, brown spot disease, Paenibacillus sp., bio-organic fertilizer, antagonism

HUANG Jian, WANG Jun, LIN Haohan, LI Zhenghua, DU Dongliang. Paenibacillus sp. Lzh-N1 Against Brown Spot Disease of Pear: Application in Bio-organic Fertilizer[J]. Journal of Agriculture, 2026, 16(2): 23-27.

Figures/Tables 3

References 30

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处理	发病率/%	染病叶片减少百分数/%	根系生物量增加倍数
对照	87.2	0	1
处理1	85.7	6.84	1.42
处理2	32.5	60.58	3.32

处理	发病率/%	染病叶片减少百分数/%	根系生物量增加倍数
对照	87.2	0	1
处理1	85.7	6.84	1.42
处理2	32.5	60.58	3.32

处理	固形物含量/%	果实硬度/(kg/cm²)	可溶性总糖/%	有机酸含量/%	平均单果重/g
对照	11.80c	5.88a	6.41c	0.23a	321.32c
处理1	12.90b	5.71b	8.15b	0.21b	333.89b
处理2	14.10a	5.65c	8.74a	0.17c	343.85a

处理	固形物含量/%	果实硬度/(kg/cm²)	可溶性总糖/%	有机酸含量/%	平均单果重/g
对照	11.80c	5.88a	6.41c	0.23a	321.32c
处理1	12.90b	5.71b	8.15b	0.21b	333.89b
处理2	14.10a	5.65c	8.74a	0.17c	343.85a

处理	产量/(kg/hm²)		病情指数		防治效果/%
处理	第一年	第二年	第一年	第二年	第一年	第二年
对照	45168.45c	46345.95c	0.49a	0.51a	—	—
处理1	51381.90b	52131.21b	0.44b	0.43b	5.71	8.35
处理2	54323.55a	56549.10a	0.36c	0.34c	26.40	31.04