PJB-2020-190
KEY SOIL PARAMETERS AFFECTING THE SURVIVAL OF PANAX NOTOGINSENG UNDER CONTINUOUS CROPPING
WUMEI XU
Abstract
Panax notoginseng (Sanqi) is a well-known herb in China and commonly used worldwide, however, its growth suffers greatly under continuous cropping. Investigating key parameters affecting its survival under continuous cropping may help to find solutions to cope with this limitation. Here we conducted a field experiment, which went for 5 year’s continuous cropping. Sanqi seedlings were cultivated in 7 plots (1.5 m × 2 m), which were randomly set along a survival gradient. In total, 13 soil parameters were investigated for their relationship with Sanqi’s survival. Pearson correlation analysis showed that the activity of phosphatase, urease, cellulase, B/F, available N and pH were significantly correlated with Sanqi’s survival rate (P < 0.05). Principal component analysis (PCA) indicated that these soil factors were majorly explained by the first component (61.38% variance explained) and soil pH was closely correlated with the other factors affecting Sanqi’s survival, indicating its importance. Therefore, we suggest that soil pH could be a key parameter of soil quality for the continuous cropping of Sanqi. It is possible to improve soil pH of the acid soils to ameliorate the poor growth of Sanqi under continuous cropping. Meanwhile, our study provides guidance in ameliorating soils for the other medicinal plants under continuous cropping since replant problem is widespread in agricultural production.
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