Plant Growth Promoting Rhinoacteria: Effect of Growth Promotion and Disease Resistance on Garlic (Allium sativum L.)

doi:10.11924/j.issn.1000-6850.casb20190800501

Abstract

Abstract:

To study the effect of different doses of plant growth promoting rhinoacteria (PGPR) on the growth promotion and disease resistance of garlic (Allium sativum L.) during the growth period, garlic seeds planted in pot were used as test materials, the germination rate of potted garlic seeds was calculated by counting method and the plant height was measured by conventional measurement method, nutrient content of planting soils was measured using soil temperature and humidity detector. Compared with the control group (CK), the ammonium nitrogen content of experimental group B (administered 4 g bacterial fertilizer) was increased by 117.60%, the effective potassium content was increased by 593.15%, and the available phosphorus content of the experimental group C (administrated 6 g bacterial fertilizer) was increased by 238.77%, the germination rate of garlic was increased by 15.17%, the plant height of seedlings was increased by 20%, and the chlorophyll was increased by 11.04% (P<0.05), indicating that PGPR had a promoting effect on garlic growth. The results of antagonistic test between garlic root rot pathogen and plant rhizosphere growth promoting bacteria showed that the harmful microbial index was decreased by 25% when bacterial fertilizer concentration was 10^-2 under dark culture at 30℃, indicating that the antibacterial effect was significant. The results of this study indicate that PGPR has a significant effect on promoting the growth of garlic, and also has certain disease-resistant effect, which has potential economic value in agricultural development.

Key words: plant growth promoting rhinoacteria (PGPR), garlic, growth promotion, disease resistance, soil nutrients

CLC Number:

S573.9

Lv Jun, Fu Chun, Xiao Ximeng, Yang Yaojun. Plant Growth Promoting Rhinoacteria: Effect of Growth Promotion and Disease Resistance on Garlic (Allium sativum L.)[J]. Chinese Agricultural Science Bulletin, 2020, 36(24): 146-153.

Figures/Tables 7

References 32

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