In order to protect, develop and utilize plant resources on the Qinghai-Tibet Plateau and improve the ecological environment, 167 species, 43 families and 121 genera of psammophytes were found through the field investigation of psammophytes in 44 sample plots in the middle basin of Yarlung Zangbo River. Except for 1 species of Fungus, 2 species of Gymnosperms and 4 species of Ferns, Angiosperms are the main components, and dicotyledonous plants are the main groups of Angiosperms. There are 138 species of herbaceous plants, with perennial herbaceous plants as the main life type. Qushui County of Lhasa City is the main distribution area of psammophytes. The species similarity in each distribution area was low, and only 7.69% of the species with the similarity coefficient above 0.4 were found in the two districts. The vertical distribution showed an "intermediate expansion" altitude distribution trend, and most species were mainly distributed between 3501-4100 m; only 28.74% of the species distributed in two or more elevations. Psammophyte species in this area are relatively abundant, and their distribution varies greatly in different counties (districts) or altitude scales. This study can provide a scientific basis for the use of native plants to breed and cultivate excellent sand-fixing plants for the restoration of vegetation in the desertification land of Qinghai-Tibet Plateau.

To enhance the utilization rate of climatic resources during the growth season of early rice in Zhejiang Province and to achieve sustained and increased yields, daily average temperature, precipitation, and sunlight data from 66 national meteorological stations in Zhejiang Province spanning from 1971 to 2022 were analyzed in this study. Utilizing methods such as linear trend analysis and Mann-Kendall (M-K) test, the spatial-temporal variation characteristics of heat, precipitation, and light resources during the early rice growing period and growing season over the past 52 years were examined. The results indicate that the average temperature during the early rice growing period and growing season exhibits a distribution pattern characterized by higher values in the southwest and lower values in the northeast. The climate tendency rate fluctuates with increase of 0.34℃/10a and 0.38℃/10a for average temperature for heat accumulation, with a significant increase point observed in 2002. The annual accumulated temperature above10℃ for early rice ranges between 2719.1 to 3286.4℃·d, also displaying a southwest-high/northeast-low gradient with an increasing climate trend of 75.8°C·d/10a; notably, northeastern regions exhibit a faster increase compared to southwestern areas, leading to a reduction in spatial disparities regarding thermal resources. Interannual variability is significant for precipitation resources; their spatial distribution decreases progressively from southwest to northeast with marked differences observed across regions. The climate trends for precipitation during both the early rice growing period and overall growth season show slow increases at rates of approximately 12.2mm/10a and 14.1mm/10a respectively; these trends follow a staircase-like distribution where northeastern areas are wetter than southwestern ones. Light resource availability demonstrates considerable interannual fluctuations as well, and sunshine resources also exhibit large interannual variations with average sunshine hours being 698.9h and 771.9h, respectively, both showing declines at rates of -11.2h/10a and -8.9h/10a.The research findings provide meteorological evidence and support for enhancing the utilization of climate resources, mitigating meteorological disasters, and implementing scientifically informed varietal distribution, and help to achieve a sustained increase in early rice production in the Zhejiang region.

In order to understand the adaptation strategy of plants to the special habitat of urban expressway, the leaf anatomical structure of five shrubs, which are Allamanda schottii, Ficus microcarpa ‘Golden Leaves’, Duranta erecta ‘Golden Leaves’, Ixora chinensis and Fagraea ceilanica, growing in road dividing strip of Nanning City was studied using isolation and paraffin section. By measuring or calculating 12 quantitative indexes such as leaf thickness, main vein thickness and stomatal density, the adaptive characteristics of various plant leaves to special environment were further analyzed by using multiple comparison and principal component analysis. The results showed that: (1) all five plants had heterophyllous leaves, which were composed of epidermis, mesophyll and veins, and stomata were only distributed in the lower epidermis. (2) The stomatal density, leaf and sponge tissue thickness were significantly different among all plants, and other indicators were also different in different degrees, indicating that the adaptation strategies of different plants were different: the six maxima and two sub-maxima of Fagraea ceilanica showed their remarkable adaptability. However, Duranta erecta ‘Golden Leaves’, which had eight minima, responded to unfavorable conditions with the maximum stomatal density and tight mesophyll tissue. The unique “compound epidermis” form of Ficus microcarpa ‘Golden Leaves’ made the upper and lower epidermis reach the maximum, and at the same time reduces the consumption with the minimum stomatal density. The thickest cuticle in Allamanda schottii was used to prevent excessive transpiration on the leaves, while the thicker cuticle and greater mesophyll compactness were used to reduce its own consumption in Ixora chinensis. (3) The comprehensive order of environmental adaptability of five greening shrubs to the road dividing strip were as follows: Fagraea ceilanica> Ixora chinensis> Ficus microcarpa ‘Golden Leaves’> Allamanda schottii> Duranta erecta ‘Golden Leaves’.

This article studied the laws of the quality change of Brassica napus L. in different altitude environments, aiming to provide a reference for high altitude Brassica napus L. introduction and quality breeding. The effects of three altitudes on the quality of erucic acid, glucosinolate, oil content, palmitic acid, stearic acid, oleic acid, linoleic acid and linolenic acid of C18 fatty acids in rapeseed were compared and analyzed with 11 rapeseed lines. The results showed that the oil content of Brassica napus L. seed showed an increasing trend with the increase of altitude, and the performance among lines was consistent, with a coefficient of variation of 0.0822. Erucic acid content increased significantly after planting at high-altitude in Lhasa, and the content of glucosinolate increased to different degrees in high altitude planting than in low altitude planting. The coefficient of variation between the two was larger, which was 0.3364 and 0.4920, respectively. Correlation analysis showed that erucic acid content and oil content were significantly positively correlated with altitude, and the correlation coefficients were 0.865 and 0.750, respectively. Glucosinol was significantly correlated with altitude, and the correlation coefficient was 0.428. High altitude was conducive to the accumulation of oil content, erucic acid and glucosinolates. The elevation of latitude was conducive to the accumulation of palmic acid and stearic acid, and the change of temperature was the main factor of most quality content changes.

In Tai'erzhuang District National Aquatic Germplasm Resources Reserve of Pelteobagrus Fulvidraco, the catch was obtained by setting up three multi-mesh compound gill nets and setting series cage pots, and the data of the catch were measured and analyzed. The present composition of fish, dominant species, biodiversity and the stock of yellow catfish (Pelteobagrus Fulvidraco) were investigated. A total of 22 species, belonging to 5 orders and 9 families, were detected, of which 14 species (64%) were cyprinoid, one species (4%) catfish and one species of herring (4%), three species of perch (14%) and three species of crustaceans (14%). For the protected species Pelteobagrus Fulvidraco, the total DNA was extracted by column genomic DNA extraction kit. The results show that the population structure is stable and the genetic diversity is at a high level, the wild germplasm resources are in good condition. This finding confirms that the biodiversity within the reserve is effectively maintained, and that positive outcomes have been achieved in the conservation efforts of pelteobagrus fulvidraco.

The collection, identification methods, and genetic diversity of Angelica dahurica germplasm resources were analyzed comprehensively, and the impact of production measures on its yield and quality was summarized. The methods for germplasm identification of Angelica dahurica included conventional identification, cytological methods, pharmacological components, DNA levels, and multiple evaluation methods. The diversity of germplasm resources included genetic diversity of phenotypic traits, quality traits, and molecular genetic diversity. The detection methods for molecular genetic diversity of germplasm resources included AFLP markers, SSR markers, ISSR markers, RAPD markers, and SRAP markers. During the planting process of this plant, factors such as fertilizer, soil type, rhizosphere growth promoting bacteria, post harvest stages, and sowing time all affect its yield and quality. The research provided references for the breeding and promotion of Angelica dahurica varieties.

[Purpose/Significance] AI technology has brought unprecedented challenges and opportunities to the knowledge service industry, requiring innovation and reform of knowledge services in various dimensions, including technology, organizational mechanisms, and service models, to adapt to the development of emerging knowledge productivity. AI technology has not only changed the way knowledge is produc ed and disseminated, it has also significantly influenced the processes by which users acquire knowledge and the systems through which they produce knowledge. Simply promoting the empowerment of knowledge services through AI from a technical point of view is not enough to achieve the transformation and upgrading of knowledge service institutions. [Method/Process] This article begins with the multi-level transformative impact of AI technology on emerging knowledge productivity, proposing that generative AI has rapidly become a powerful new force in knowledge production, and that AI agents are gradually becoming revolutionary tools for the flexible design and innovation of complex processes. We argue that the rapid development of AI has deepened the connotations and forms of AI empowerment. The article further explores the barriers in production relations in the development of new quality productive knowledge services and examines the challenges of aligning traditional knowledge services with user knowledge processes and user production systems in the AI environment. We propose to promote the development of the knowledge service industry through multi-level AI empowerment and innovation of the traditional organizational mechanisms of knowledge services. The article emphasizes placing the construction of new production relations at the key point of AI empowerment, developing new user-oriented, user-process-driven knowledge service organizational models, and developing new docking logic and service embedding architectures between knowledge services and user production systems, as well as building user-oriented, service-driven internal organizational models. Specifically, we present possible new directions for knowledge service production relations, such as the Library-Inside model, the Inside-Out+Outside-In model, new docking architectures between knowledge services and user production systems, and reforms in internal organizational models of institutions. [Results/Conclusions] By exploring the multi-level transformative effects of AI technology and analyzing the barriers in the production relations of new quality productive knowledge services, this article proposes to reform and innovate the production relations of knowledge services. In order to promote the development of new quality productive knowledge services, we summarize the construction ideas of new-type knowledge service production relations, aiming to sustainably promote the development of new quality producitve knowledge services in the process of improving users' knowledge productivity and promoting the high-quality development of users' production systems.

9 soybean germplasm resources were selected, including JD001, JD002, and JD003, as materials, and 8 agronomic traits such as plant height, bottom pod height and main stem node number were evaluated by entropy weight TOPSIS method, and then cluster analysis was carried out in order to provide theoretical references for the breeding of new soybean varieties. The results showed that among various agronomic traits, the ones with higher coefficients of variation were effective branch number per plant (64.79%), bottom pod height (31.44%), and effective pod number per plant (28.77%), indicating that these 3 traits have rich genetic improvement potential and can be applied to soybean variety breeding and identification. Through entropy weight TOPSIS method and cluster analysis, 9 soybean varieties were divided into three types, one was JD006 (good type), the second category were JD001, JD004, JD005 and JD009 (medium type), the third category were JD002, JD003, JD007 and JD008 (general type). Among them, the soybean variety JD006 was suitable for use as a high-quality parent.

In order to cultivate high-quality applied talents, the characteristics of the curriculum and the training needs of environmental professionals were combined, attached importance to the application of practical case teaching method, and conducted practical case teaching analysis and exploration in the teaching process of Environmental Monitoring course. The investigation of soil pollution was taken as a practical case, conduct a detailed analysis of the investigation results. By investigating regional division, determining soil distribution principles and quantities, collecting soil samples, determining analysis indicators and testing methods, and verifying testing quality and results, a practical case soil environmental monitoring plan was formulated, and the testing results were analyzed. Practice had shown that, this practical case teaching model effectively improved teaching quality and provided references for the reform of case teaching in this course.

This study investigated 30 wild tea tree germplasm resources in Xiangwo mountain of Yunfu from the primary agronomic characteristics, quality components, and suitability status. The aim of this study was to explore and utilize the wild tea tree germplasm resources in Xiangwo mountain, and lay the groundwork for breeding and improvement of local new tea tree cultivars. Results indicated that the coefficient of variation (CV) of the 17 key biochemical indicators of Xiangwo tea resources ranged from 9.01% to 36.94%, suggesting a high diversity of tea tree resources. The theobromine exhibited the highest CV, while water extract showed the lowest. Among the five physical and chemical indicators, soluble sugar demonstrated the highest CV at 20.28%, whereas water extract had the lowest CV (9.01%). The phenol-to-amino acid ratio varied from 5.25 to 6.92, with a CV of 13.69. Sensory evaluation showed that black teas produced from Yunnan Daye and Shuixian group in spring had dark, tight shapes with abundant trichomes, fresh and relatively high aroma, thick and lingering sweet tastes, with an average score of 92.11. On the other hand, part of green teas produced in summer using the same tea materials had tight, yellow-green appearance with more trichome, bright yellow-green color of the tea soup, high chestnut aroma, and thick, robust taste with a sweet and fresh note, scoring an average of 88.78. The quality of black teas produced from CXY14, CXY15, and CXY17 in Yunnan large leaf group surpasses that of other individual tea plants. Similarly, the green teas made from CXX4 in Xinxing small leaves and CXY12 in Yunnan large leaves were better than other tea plant resources. Particularly, CXY4 represents a versatile tea tree resource suitable for producing both black and green teas. These tea resources have the potential to evolve into superior tea varieties in the Xinxing region.

This study aims to analyze one of the main obstacles in the consumption and processing of freshwater fish products - the earthy smell, especially its key odorant compound geosmin (GSM). By testing the GSM concentration in 84 aquaculture ponds in Jiangsu Province and their water environmental factors (including salinity, pH, dissolved oxygen, temperature, total suspended solids, total nitrogen, total phosphorus, and permanganate index), correlation analysis and path analysis methods were used to screen out the key environmental factors affectingGSM. The results show that the detection rate of GSM in all ponds is as high as 97.6%, with an average detected content of (27.83±20.06) ng/L, which largely exceeds the human perception threshold; salinity and permanganate index have a significant negative impact on GSM, and the direct effects of both salinity and permanganate index are greater than their indirect effects, with these two factors independently playing a negative regulatory role in the GSM of aquaculture ponds. Therefore, in the process of aquaculture management, salinity and permanganate index can be taken as the key environmental factors for monitoring the water environment of aquaculture ponds, targeted management measures can be adopted accordingly, thereby improving the water quality of aquaculture ponds and more effectively and conveniently solving the problem of earthy smell in aquaculture water bodies and products.