PJB-2021-301
Effects of crop rotation on growth and physiological indexes of Panax notogingseng
Feiyang Wang, Xijun Yan, Meitang Wei, Weiguo Chai, Qinxiang Chang, Guangjian Shen, Pengguo Xia and Zongsuo Liang
Abstract
Panax notoginseng is widely used as a kind of medicinal plant because of its anti-tumor, antioxidative, anti-inflammatory, and neuro-protective activities. Continuous cropping obstacle is currently a major problem restricting the development of the P. notoginseng. Crop rotation might reduce the replant problems, but little information is available on the effect of other crops rotation on soil cultivated with ginseng. In this study, we analyzed growth and physiological indexes, saponins and the expression of saponins synthesis genes from the P. notoginseng field after planting coix seed, dry rice, ginger, pepper, and tobacco. Six crop rotation modes were set up to explore the changes in the indicators of P. notoginseng. Physiological indicators were measured by a microplate reader. The content of the five saponins was determined by HPLC, and the expression of saponins synthesis genes was detected by real-time quantitative PCR. The results showed that the incidence rate of M5 (P. notoginseng- ginger- coix seed- P. notoginseng) was the lowest (23.08%). The growth index in M5 is the highest. The content of defense enzymes decreased with increasing crop rotation interval. A parallel comparison with the same interval period showed that the saponins content in the rotation fields of coix seed was slightly higher. The test results of soluble sugar, soluble protein and chlorophyll showed that the rotation sites of P. notoginseng and coix seed could improve the photosynthetic parameters and physiological indicators of P. notoginseng leaves. The above results indicated that M5 was a suitable crop rotation mode for P. notoginseng. Coix seed rise proved to be more suitable as a previous crop of P. notoginseng. Choosing a reasonable crop rotation is more effective than increasing the rotation time.
To Cite this article:
Wang, F., X. Yan, M. Wei, W. Chai, Q. Chang, G. Shen, P. Xia and Z. Liang. 2023. Effects of crop rotation on growth and physiological indexes of Panax notogingseng. Pak. J. Bot., 55(1): DOI: http://dx.doi.org/10.30848/PJB2023-1(7)
Download
