XU Xinjuan
Henan Institute of Science and Technology, Collaborative Innovation Center of Modern Biological Breeding, Xinxiang 453003, Henan, ChinaWEI Qichao
Henan Institute of Science and Technology, Collaborative Innovation Center of Modern Biological Breeding, Xinxiang 453003, Henan, ChinaLUO Qingyun
Nanjing Agricultural University, Nanjing 210095, ChinaZHOU Boya
Xinghua Green Biological Products Co., Taizhou 225776, Jiangsu, ChinaIn order to understand the mechanism of continuous cropping obstacles, the changes in soil properties after continuous cropping of Stevia rebaudiana were studied, and the correlations between soil properties and leaf dry mass and stevioside were discussed. The results showed that there were no significant differences in soil pH, organic matter, available phosphorus, urease, catalase, sucrase, phosphatase, leaf dry weight and stevioside components between 2- and 3-year continuous cropping. However, after continuous cropping for 4 years, soil pH, total nitrogen and available potassium decreased significantly, which were 10.07%, 14.38% and 24.79% lower than the control, respectively. But the soil electric conductivity (EC) and available phosphorus increased significantly with 2.57 and 1.70 times to the control. Meanwhile, the activities of urease, sucrase, alkaline phosphatase, microbial biomass carbon and microbial biomass nitrogen in soil were 63.68%, 72.03%, 47.43% and 78.35% lower than the control, while the activity of polyphenol oxidase reached the highest, which was 4.22 times to the control. Compared with the control, leaf dry weight and stevioside decreased by 29.51% and 16.00%, while the content of rebaudioside A increased by 22.19%. There were correlations between leaf dry weight and stevioside content and soil properties. Therefore, it was suggested that continuous cropping affects the yield and quality of stevia by changing soil properties, and the maximum continuous cropping period in production should not exceed 3 years.
徐新娟,魏琦超,罗庆云,周伯雅.连作改变土壤性状对甜叶菊产量和品质的影响[J].热带亚热带植物学报,2023,31(4):549~556
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