| Effects of different irrigation methods and fertilization levels on soil nutrients and physiological growth of Panax notoginseng |
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| DOI：10.7606/j.issn.1000-7601.2026.01.13 |
| Key Words: Panax notoginseng irrigation methods organic fertilizer amount soil nutrients root rot disease root biomass |
| Author Name | Affiliation | | LIANG Jiaping | College of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Key Laboratory of Efficient Utilization and Intelligent Control of Agricultural Water Resources in Yunnan Province, Kunming, Yunnan 650500, China | | WANG Guosheng | College of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Key Laboratory of Efficient Utilization and Intelligent Control of Agricultural Water Resources in Yunnan Province, Kunming, Yunnan 650500, China | | HE Yanming | College of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Key Laboratory of Efficient Utilization and Intelligent Control of Agricultural Water Resources in Yunnan Province, Kunming, Yunnan 650500, China | | LIANG Yonghong | College of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Key Laboratory of Efficient Utilization and Intelligent Control of Agricultural Water Resources in Yunnan Province, Kunming, Yunnan 650500, China | | YANG Qiliang | College of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Key Laboratory of Efficient Utilization and Intelligent Control of Agricultural Water Resources in Yunnan Province, Kunming, Yunnan 650500, China | | WANG Haidong | College of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Key Laboratory of Efficient Utilization and Intelligent Control of Agricultural Water Resources in Yunnan Province, Kunming, Yunnan 650500, China |
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| Abstract: |
| This study aimed to reveal the mechanisms by which different irrigation methods and fertilization amounts affect soil nutrients and the physiological growth of Panax notoginseng, and proposes an irrigation and fertilization strategy tailored to the water and fertilizer requirements of P. notoginseng. Five\|year\|old P. notoginseng plants were selected as the study subjects. Three irrigation methods of oxygenated subsurface drip irrigation (OI), micro\|sprinkler irrigation (SI), and drip irrigation (DI) of and four organic fertilizer application levels (F1: 75 kg·hm-2, F2: 100 kg·hm-2, F3: 125 kg·hm-2, and F4: 150 kg·hm-2) were designed to explore the effects of different irrigation methods and organic fertilizer application levels on soil nutrient content, growth index, leaf photosynthetic characteristics, and the incidence of root rot of P. notoginseng. The results showed that OIF4 treatment was beneficial to the improvement of soil nutrients in the root zone. Compared to other treatments, the contents of nitrate nitrogen, available phosphorus, available potassium, and organic matter in the 0-30 cm soil layer increased by 8.7% to 55.9%, 14.5% to 51.9%, 1.2% to 34.6%, and 2.2% to 29.4% during the growth period, respectively. The SIF3 treatment was beneficial to the growth and photosynthetic characteristics of P. notoginseng. Compared to other treatments, plant height, stem diameter, leaf length, leaf width, net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) increased by 30.04% to 47.21%, 39.06% to 60.77%, 9.19% to 22.29%, 15.51% to 26.29%, 35.59% to 52.99%, 131.54% to 190.16%, and 17.06% to 21.71%, respectively. Under OIF3 treatment, the incidence rate of root rot disease in P. notoginseng at the seedling, flowering, and fruiting stages was the lowest, which were 5.72%, 7.98%, and 9.07%, respectively. Compared to other treatments, the fresh and dry root masses of individual plants in the OIF3 treatment at the seedling, flowering, and fruiting stages were the highest and increased by 10.2% to 50.3% and 21.8% to 63.2%, respectively. In summary, the oxygenated subsurface drip irrigation (OI) and organic fertilizer of 125 kg·hm-2 combination was recommended as the optimal strategy for reducing root rot incidence and enhancing root growth in P. notoginseng. |
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