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| 3种改良剂对连作川党参生长及其土壤生化性质的影响 |
| Effects of three amendments on the growth of Codonopsis tangshen and soil biochemical properties under continuous cropping system |
| 投稿时间：2020-04-16 修订日期：2020-06-06 |
| DOI： |
| 中文关键词: 改良剂 连作 川党参 生长 土壤生化性质 |
| 英文关键词: soil amendment, continuous cropping, Codonopsis tangshen, growth, soil biochemical property |
| 基金项目: |
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| 摘要点击次数: 336 |
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| 中文摘要: |
| 以有机肥、微生物肥和硅钙钾镁肥为改良材料，研究不同改良剂对连作川党参生长及土壤生化性质的影响，为消减川党参连作障碍提供科学依据和技术支撑。结果表明，有机肥、微生物肥和硅钙钾镁肥显著提升了川党参叶片SPAD值，增幅分别为41.22%、20.73%和47.40%。有机肥和硅钙钾镁肥显著增加川党参产量，增幅分别为20.2%和13.8%。有机肥和微生物显著提高川党参多糖含量，增幅分别为18.2%和12.2%。微生物肥显著增加川党参炔苷含量，增幅为18.3%。3种改良剂对土壤生化性质影响差异较大，与对照相比，有机肥和硅钙钾镁肥处理显著提高了土壤pH，分别提高0.28和0.14个单位；显著降低土壤交换性铝含量，降幅分别为19.9%和8.7%。微生物肥显著降低土壤有机质，降幅为12.0%。有机肥、微生物肥和硅钙钾镁肥均显著增加土壤速效钾含量，增幅分别为107.5%、23.2%和32.6%。硅钙钾镁肥显著增加细菌丰度，降低真菌丰度，细菌和真菌的比例提高5038倍。综上，3种改良剂均可提高川党参光合代谢能力，但不同改良剂对连作川党参生长及土壤生化性质的影响存在差异。有机肥和硅钙钾镁肥显著提高川党参产量，微生物肥显著提升川党参炔苷含量。综合效应分析表明，3种改良剂对连作川党参的促生效果由大到小排序为有机肥(4500 kg·hm-2)>微生物肥(750 kg·hm-2)>硅钙钾镁肥(750 kg·hm-2)。 |
| 英文摘要: |
| A field experiment with four treatments (control (CK), organic manure (OM), microbial fertilizer (MF) and silicon-calcium-potassium-magnesium fertilizer (SCPM)) was conducted to investigate the effects of three amendments on growth and rhizospheric soil biochemical properties of Codonopsis tangshen under continuous cropping system, so as to provide scientific basis and technical support for alleviating the continuous cropping obstacle of C. tangshen. The results showed that the SPAD value of C. tangshen leaf under the OM, MF and SCPM treatments was enhanced by 41.22%, 20.73% and 47.40%, respectively, compared with the control. The OM and SCPM treatments significantly increased the yield of C. tangshen by 20.2% and 13.8%, respectively. The OM and MF treatments remarkably increased the polysaccharide content by 18.2% and 12.2%, and the MF treatment increased the lobetyolin content significantly by 18.3%. After the application of OM and SCPM, the soil pH was increased by 0.28 and 0.14 units, and the soil exchangeable aluminum content was decreased by 19.9% and 8.7%, respectively, compared with the control. The MF treatment significantly decreased the soil organic matter content by 12.0% compared with the control. The soil available potassium content of OM, MF and SCPM treatments was increased by 107.5%, 23.2% and 32.6%, respectively, compared with the control. Interestingly, the SCPM treatment remarkably increased the soil bacterial abundance and decreased the soil fungal abundance, and the ratio of bacteria and fungi was increased by 5038 times compared with the control. Generally, all the three amendments enhanced the photosynthetic capacity of C. tangshen while had different effects on plant growth and rhizospheric soil biochemical properties. The OM and SCPM treatments improved the yield of C. tangshen, while the MF treatment increased the lobetyolin content of C. tangshen. The comprehensive analysis showed that the promotion effects of the three amendments on C. tangshen growth followed the order of OM (4500 kg·hm-2) > MF (750 kg·hm-2) > SCPM (750 kg·hm-2). |
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