Wumei Xu1,2,3, Fengyun Wu1, Haoji Wang1, Linyan Zhao1, Xue Liu3, Ping Xiang3, Huilin Guan4,5, Lena Q Ma6. 1. Yunnan Provincial Observation and Research Station of Soil Degradation and Restoration for Cultivating Plateau Traditional Chinese Medicinal Plants, Yunnan Normal University, Kunming, 650500, China. 2. Yunnan Provincial Renewable Energy Engineering Key Laboratory, Yunnan Normal University, Kunming, 650500, China. 3. Institute of Environmental Remediation and Human Health, Southwest Forestry University, Kunming, 650000, China. 4. Yunnan Provincial Observation and Research Station of Soil Degradation and Restoration for Cultivating Plateau Traditional Chinese Medicinal Plants, Yunnan Normal University, Kunming, 650500, China. ghl0871@aliyun.com. 5. Yunnan Provincial Renewable Energy Engineering Key Laboratory, Yunnan Normal University, Kunming, 650500, China. ghl0871@aliyun.com. 6. Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
Abstract
Negative plant-soil feedbacks lead to the poor growth of Panax notoginseng (Sanqi), a well-known herb in Asia and has been used worldwide, under continuous cropping. However, the key soil parameters causing the replant problem are still unclear. Here we conducted a field experiment after 5-year continuous cropping. Sanqi seedlings were cultivated in 7 plots (1.5 m × 2 m), which were randomly assigned along a survival gradient. In total, 13 important soil parameters were measured to understand their relationship with Sanqi's survival. Pearson correlation analysis showed that 6 soil parameters, including phosphatase, urease, cellulase, bacteria/fungi ratio, available N, and pH, were all correlated with Sanqi's survival rate (P < 0.05). Principal component analysis (PCA) indicated that they explained 61% of the variances based on the first component, with soil pH being closely correlated with other parameters affecting Sanqi's survival. The optimum pH for Sanqi growth is about 6.5, but the mean soil pH in the study area is 5.27 (4.86-5.68), therefore it is possible to ameliorate the poor growth of Sanqi by increasing soil pH. This study may also help to reduce the replant problem of other crops under continuous cropping since it is widespread in agricultural production.
Negative plant-soil feedbacks lead to the poor growth of n>an class="Species">Panax notoginseng (Sanqi), a well-known herb in Asia and has been used worldwide, under continuous cropping. However, the key soil parameters causing the replant problem are still unclear. Here we conducted a field experiment after 5-year continuous cropping. Sanqi seedlings were cultivated in 7 plots (1.5 m × 2 m), which were randomly assigned along a survival gradient. In total, 13 important soil parameters were measured to understand their relationship with Sanqi's survival. Pearson correlation analysis showed that 6 soil parameters, including phosphatase, urease, cellulase, bacteria/fungi ratio, available N, and pH, were all correlated with Sanqi's survival rate (P < 0.05). Principal component analysis (PCA) indicated that they explained 61% of the variances based on the first component, with soil pH being closely correlated with other parameters affecting Sanqi's survival. The optimum pH for Sanqi growth is about 6.5, but the mean soil pH in the study area is 5.27 (4.86-5.68), therefore it is possible to ameliorate the poor growth of Sanqi by increasing soil pH. This study may also help to reduce the replant problem of other crops under continuous cropping since it is widespread in agricultural production.
Authors: Syrie M Hermans; Hannah L Buckley; Bradley S Case; Fiona Curran-Cournane; Matthew Taylor; Gavin Lear Journal: Appl Environ Microbiol Date: 2016-12-15 Impact factor: 4.792
Authors: Ashish A Malik; Somak Chowdhury; Veronika Schlager; Anna Oliver; Jeremy Puissant; Perla G M Vazquez; Nico Jehmlich; Martin von Bergen; Robert I Griffiths; Gerd Gleixner Journal: Front Microbiol Date: 2016-08-09 Impact factor: 5.640