Lin Ya-Meng, Li Ming-Hua, Dai Chun-Yan, Liu Yuan, Zhang Wen-Ping, Yang Qian, Cui Xiu-Ming, Yang Ye
Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China.
Key Laboratory of Panax notoginseng Resources Sustainable Development and Utilization of State Administration of Traditional Chinese Medicine, Kunming, China.
Front Microbiol. 2024 Jul 26;15:1443526. doi: 10.3389/fmicb.2024.1443526. eCollection 2024.
a medicinal herb in China, is attacked by several pathogens during its cultivation. Dazomet (DZ) is a soil fumigant that is effective in controlling soil-borne pathogens, but its long-term effects on growth and soil properties are unknown.
We conducted field experiments over two consecutive years to assess the impact of three concentrations of DZ fumigation (35 kg/666.7 m, 40 kg/666.7 m, and 45 kg/666.7 m) on soil physicochemical properties, microbial diversity, and growth. Correlation analyses were performed between microbial community changes and soil properties, and functional predictions for soil microorganisms were conducted.
DZ fumigation increased total nitrogen, total phosphorus, total potassium, available phosphorus, available potassium, and ammonia nitrogen levels in the soil. DZ fumigation promoted the nutrient accumulation and improvement of agronomic traits of , resulted in a 2.83-3.81X yield increase, with the highest total saponin content increasing by 24.06%. And the 40 kg/666.7 m treatment had the most favorable impact on growth and saponin accumulation. After DZ fumigation, there was a decrease in the relative abundance of pathogenic fungi such as , , and , while beneficial bacteria such as , , and increased. The effects of fumigation on soil microorganisms and soil physicochemical properties persisted for 18 months post-fumigation. DZ fumigation enhanced the relative abundance of bacteria involved in the biosynthesis of secondary metabolites and arbuscular mycorrhizal fungi, reduced the relative abundance of plant-animal pathogenic fungi, reduced the occurrence of soil-borne diseases.
In conclusion, DZ fumigation enhanced soil physicochemical properties, increased the proportion of beneficial bacteria in the soil, and rebalanced soil microorganism populations, consequently improving the growth environment of and enhancing its growth, yield, and quality. This study offers a theoretical foundation for DZ fumigation as a potential solution to the continuous cropping issue in perennial medicinal plants such as .
作为中国的一种药用植物，在其种植过程中受到多种病原体的侵袭。棉隆（DZ）是一种土壤熏蒸剂，对控制土传病原体有效，但其对[植物名称]生长和土壤性质的长期影响尚不清楚。
我们连续两年进行田间试验，以评估三种浓度的棉隆熏蒸（35千克/666.7平方米、40千克/666.7平方米和45千克/666.7平方米）对土壤理化性质、微生物多样性和[植物名称]生长的影响。对微生物群落变化与土壤性质进行了相关性分析，并对土壤微生物进行了功能预测。
棉隆熏蒸增加了土壤中的全氮、全磷、全钾、有效磷、有效钾和铵态氮含量。棉隆熏蒸促进了[植物名称]的养分积累和农艺性状改善，使产量提高了2.83 - 3.81倍，总皂苷含量最高增加了24.06%。并且40千克/666.7平方米的处理对[植物名称]生长和皂苷积累的影响最为有利。棉隆熏蒸后，[致病真菌名称1]、[致病真菌名称2]和[致病真菌名称3]等致病真菌的相对丰度降低，而[有益细菌名称1]、[有益细菌名称2]和[有益细菌名称3]等有益细菌增加。熏蒸对土壤微生物和土壤理化性质的影响在熏蒸后持续了18个月。棉隆熏蒸提高了参与次生代谢物生物合成的细菌和丛枝菌根真菌的相对丰度，降低了植物 - 动物致病真菌的相对丰度，减少了土传病害的发生。
总之，棉隆熏蒸增强了土壤理化性质，增加了土壤中有益细菌的比例，重新平衡了土壤微生物种群，从而改善了[植物名称]的生长环境，促进了其生长、产量和品质。本研究为棉隆熏蒸作为解决[植物名称]等多年生药用植物连作问题的潜在解决方案提供了理论基础。
