Qinting Lake Park has effectively imported Rhododendron varieties from Zhejiang Province. The analytic hierarchy process was employed to devise an evaluation framework to evaluate the ornamental and adaptive features of these species. Subsequently, we conducted a standardized evaluation of 24 species for their ornamental and adaptive traits under controlled cultivation conditions. The findings indicated that the percentage of ornamental flowers in the first-level index was significantly greater than the other two factors, indicating that the ornamental value of flowers was the most important in the evaluation of Rhododendron ornamental value. Among the secondary indicators, the proportion of flower color and flower weight was significantly higher than that of other factors, which had the greatest impact on the evaluation results. The 24 Rhododendron species were classified into two grades based on their ornamental value, as determined by index weights and scoring standards. Rhododendron ‘Xueqing’, Rhododendron ‘Big Qinglian’, and Rhododendron ‘Jinyang No. 9’ exhibited superior ornamental value and demonstrated more favorable suitability for garden applications.

Soil organic carbon (SOC) largely influences soil quality and sustainability. The effects of no-till (NT) and crop straw return practices (SR) on soil organic carbon sequestration have been well documented. However, the mechanism of soil bacterial community in regulating soil organic carbon under NT and SR remains unclear. In this study, we investigated the impacts of tillage (conventional tillage (CT) and NT) and crop straw return practices (crop straw removal (NS) and SR) on topsoil layer (0–5 cm) bacterial community, CH₄ and CO₂ emissions and SOC fractions in rice-wheat cropping system. Overall, in the wheat season following the annual rice-wheat rotation in two cycles, NT significantly increased SOC by 4.4% for 1–2 mm aggregates in the 0–5 cm soil layer, but decreased CO₂ emissions by 7.4%. Compared with NS, SR notably increased the contents of SOC in the topsoil layer by 6.5% and in macro-aggregate by 17.4% in 0–5 cm soil layer, and promoted CH₄ emissions (by 22.3%) and CO₂ emissions (by 22.4%). The combination of NT and NS resulted in relatively high SOC and low CH₄ emissions along with high bacterial community abundance. The most abundant genus under different treatments was Gp6, which significant impacted SOC and MBC. Bacterial communities like Subdivision3 had the most impact on CH₄ emissions. Structural equation modeling further suggested that the soil bacterial community indirectly mediated the SOC through balancing SOC in 1–2 mm aggregates and CH₄ emissions. This study provides a new idea to reveal the mechanism of short-term tillage and straw return on SOC.

Introduction: Negative oxygen ions are produced by plants through photosynthesis, utilizing "tip discharge" or the photoelectric effect, which has various functions such as sterilization, dust removal, and delaying aging. With global warming, high temperatures may affect the ability of Phalaenopsis aphrodite Rchb. f. to produce negative oxygen ions. P. aphrodite is commonly used in modern landscape planning and forest greening.Methods: In this study, P. aphrodite was selected as the research object. By artificially simulating the climate, the control group (CK) and the high temperature stress group (HS) were set up in the experiment.Results: The study found that compared with the control group, the ability of P. aphrodite to produce negative oxygen ions significantly decreased when exposed to high temperature stress. Meanwhile, under high temperature stress treatment, peroxidase content increased by 102%, and proline content significantly increased by 35%.Discussion: Redundancy analysis results indicated a significant correlation between the root endophytic microbial community of P. aphrodite and negative oxygen ions, as well as physiological indicators. Under high temperature stress, P. aphrodite may affect the regulation of physiological indicators by modifying the composition of root endophytic microbial communities, thereby influencing the ability to release negative oxygen ions.

This experiment focused on the newly discovered wild Eulophia graminea in Fujian, conducting in vitro culture of multiple plant tissues to ensure the potential for large-scale application of this species. The active components measured in the pseudobulb of this newly recorded species included total triterpenoids, total flavonoids, total polysaccharides, and total sterols. The study indicated that the newly recorded species of Eulophia graminea could produce cluster buds and sterile buds through tissue culture. The average content of triterpenoids was 2 mg g⁻¹, flavonoids averaged 0.018 mg mL⁻¹, polysaccharides averaged 11.75%, and sterols averaged 9.14 mg g⁻¹. The relatively high levels of these four active substances demonstrate that the newly discovered Eulophia graminea possesses certain medicinal value. This experiment aims to provide a theoretical basis for the tissue culture and medicinal value development of this experiment focused on the newly discovered wild Eulophia graminea in Fujian, conducting in vitro culture of multiple plant tissues to ensure the potential for large-scale application of this species. The active components measured in the pseudobulb of this newly recorded species included total triterpenoids, total flavonoids, total polysaccharides, and total sterols. The study indicated that Eulophia graminea Lindley from Fujian could produce cluster buds and sterile buds through tissue culture. The average content of triterpenoids was 2 mg g⁻¹, flavonoids averaged 0.018 mg mL⁻¹, polysaccharides averaged 11.75%, and sterols averaged 9.14 mg g⁻¹. The relatively high levels of these four active substances demonstrate that the newly discovered Eulophia graminea possesses certain medicinal value. This experiment aims to provide a theoretical basis for the tissue culture and medicinal value development of the newly recorded species of Eulophia graminea Lindley from Fujian.