In order to explore the potential advantages of ‘Chuanmai 614’, and better serve production and application, this study analyzed its yield performance. Using 3-year regional trial data, the yield, stability and adaptability of ‘Chuanmai 614’ were studied using the analysis method of multi-year and multi-point comparison test and the GGE biplot model. The results showed that the average yield of ‘Chuanmai 614’ was 6031.50 kg/hm2, ranking second, with good stability and adaptability to multiple environments. In the production experiment, the average yield of ‘Chuanmai 614’ was 7031.55 kg/hm2, which ranked the first, and there was an increase of 8.79% compared to the control. Among the GGE biplot model analysis, the ‘variety with highest yield in different places’ functional diagram indicated that ‘Chuanmai 614’ had high production and good adaptability in Dazhou, Neijiang, Nanbu, Shuangliu, and Zhongjiang; the functional diagram of ‘high yield and stable yield’ showed that among all the varieties, ‘Chuanmai 614’ had the highest yield and good stability. The GGE biplot chart with concentric circles indicated that ‘Chuanmai 614’ had good yield and stability. Overall, ‘Chuanmai 614’ is a new nutrient efficient variety with good yield and stability.
To establish a solid theoretical foundation for the efficient management of insect pests in corn crops, practical plant protection strategies that reduce the amount of pesticides should be explored. A study was conducted to investigate the occurrence of Spodoptera frugiperda on maize in the mountainous area of Mengga Town, Mangshi City, Dehong Prefecture, Yunnan Province. Two types of pesticides, 5% emamectin benzoate and 15% indoxacarb, were tested on Spodoptera frugiperda in corn fields using plant protection drones and knapsack electric sprayers. Spodoptera frugiperda larvae can cause damage in the whole growth period of maize, and the infestation rate, damage index, number of insects per 100 plants, and the proportion of different insect ages in different growth stages of maize are significant different, and Spodoptera frugiperda is the most harmful in the big bell stage of maize. Two different methods of applying 5% emamectin benzoate and 15% indoxacarb had a significant impact on the incidence of Spodoptera frugiperda in maize fields. The damage rate and index of maize also showed a significant decrease between 3 to 14 days after application. There was no significant difference in the relative control efficacy of the same pesticide against Spodoptera frugiperda under two different methods. Still, the use of plant protection drones pesticide application had the advantages of labor-saving, time-saving, and pesticide-saving. Spodoptera frugiperda control had a positive effect on increasing the production of maize in the yield, and the experimental treatments results showed a significant increase in yield of the test variety 'Yunrui 62', with 25.28% to 28.93% production increase compared to the control treatment. In total, it is recommended to use UAVs equipped with anti-spray technology to protect plants during large-scale Spodoptera frugiperda control. Additionally, it's important to conduct thorough investigations and implement field management practices to prevent corn insect infestations, which are crucial for achieving high and stable crop yields. It's important to focus on integrating, demonstrating, and promoting the use of this technology in the future.
In order to collect crop germplasm resources in Nanyang and understand their current status, relying on the third national general survey and collection action on crop germplasm resources, crop germplasm resources investigation team of Nanyang visited 4 key agricultural counties, 75 townships, 1241 administrative villages from 2021 to 2023, and classified, organized, analyzed the collected germplasm resources. A total of 352 endangered, rare, and excellent crop germplasm resources were collected, including 98 food crops, 171 vegetables, 30 fruit trees, 28 cash crops, and 25 forage green manure, involving 131 species from 95 genera in 32 families, and 5 particularly rare and excellent crop resources were collected. The research results provide possibilities for the protection and innovation of crop germplasm resources in Nanyang City.
To alleviate the obstacles of continuous cropping of foxtail millet, the effects of different soil conditioners on the root characteristics of foxtail millet planted in continuous cropping soil were investigated. The test was conducted with 4 soil conditioners and 1 non-fertilized control treatment. Four soil improvers include self-developed formula treatment (including seaweed essence, polyglutamic acid and EDTA chelated trace elements), earthworm polysaccharide treatment, microbial agent treatment and chitooligosaccharides treatment. For each soil conditioner treatment, two fertilization gradients were set as the common dose in agriculture and the equivalent dose, a total of 9 treatments. The experiment measured the plant height, dry and fresh weight, root traits, and other related indicators of different treatments during the 7-leaf stage and booting stage. The results showed that compared to the unfertilized control (CK), all soil conditioners improved the growth of foxtail millet in continuous cropping soil. Among them, chitooligosaccharides and earthworm polysaccharides had the best effect on promoting the growth of foxtail millet roots. After treatment with chitooligosaccharides, the total length of roots increased by 87.4% to 120%, the average diameter of roots increased by 21.7%, and the total number of root tips increased by 93.8% to 144%. During the booting stage after treatment with earthworm polysaccharides, the total length of roots increased by 128% to 161.3%, the average diameter of roots increased by 4.3% to 8.6%, and the total number of root tips increased by 151.4% to 183%. In summary, chitooligosaccharides and earthworm polysaccharide could promote the growth of foxtail millet roots and alleviate obstacles to continuous cropping. This study provided a certain scientific basis for alleviating continuous cropping obstacles in production.
The objective is to establish a scenic beauty evaluation system by studying the landscape characteristics of typical plant communities in the central green corridor of Xixian New District, so as to provide an effective scientific basis for landscape optimization and conservation management. The scenic beauty evaluation method (SBE method) was used to calculate the scenic beauty values of a total of 36 landscape samples in 3 different functional areas of the central green corridor. The landscape factors that had significant influence on the scenic beauty of plant landscapes in various places were screened through correlation analysis. The scenic beauty evaluation model of plant community in the central green corridor was established through model fitting test, variance analysis and model regression analysis. The results showed as follows. (1) The SBE values of 36 landscape plots in the central green corridor ranged from -0.1431 to 0.1389, among which 11 plots had values <0 (31%), 25 plots had values >0 (69%), and 0 plots had ≥1, indicating that the overall landscape quality was relatively normal. (2) The evaluation model of plant landscape beauty of the central green corridor was Y=-0.16+0.018X2+0.015X3+0.021X5, where X2 was plant richness, X3 was landscape coordination, and X5 was plant ornamental. The results show that the factors that have the greatest influence on the beauty quality of the central green corridor are plant ornamental, plant richness and landscape coordination.
The study aims to provide a theoretical basis for the study of the coloration mechanism of Sapium sebiferum and its configuration in garden applications. During the color-changing period of S. sebiferum leaves, physiological indexes such as chlorophyll, carotenoid and anthocyanin in different color systems of red, yellow and purple were measured regularly, the changing trend of pigment content in different color systems was compared, and the correlation between each pigment content and temperature change was analyzed. The results showed that the contents of chlorophyll a and chlorophyll b in red, yellow and purple S. sebiferum showed a decreasing trend, and the contents of chlorophyll a, chlorophyll b and carotenoid in purple were higher than those in other colors. Low temperature had little effect on the formation of yellow anthocyanins, but accelerated the formation of purple and red anthocyanins, and the increase of its content was conducive to the color of purple and red S. sebiferum leaves. Although soluble sugar did not directly affect the change of leaf color, it could indirectly regulate the change of leaf color parameters such as chlorophyll.
The effect of pipeline trunk transfusion and drip fertilizers on the nutritional growth and photosynthetic characteristics of Chinese chestnut was explored in this paper, with a view to providing a theoretical basis for the application of this technology in Chinese chestnut cultivation. The test was conducted with the 3-year-old Chinese chestnut cultivar ‘Yanzi’ as the material and set up 3 fertilization periods and 3 fertilization concentrations to carry out a 3-factor, 3-level orthogonal test. The test was conducted with no fertilizer as control (CK) and a total of 10 treatments. The results showed that pipeline trunk transfusion and drip fertilizers significantly improved branch growth indexes compared to CK treatment. Moreover, fertilization in early May (T1) significantly affected branch length, thickness, and internode length, and fertilization in early-mid June (T2) affected branch thickness. The promotional effects of pipeline trunk transfusion and drip fertilizers on the photosynthetic properties of Chinese chestnut leaves increased with increasing fertilizer application. Comprehensive evaluation and analysis by entropy weight-TOPSIS method revealed that the C9 treatment with N4 concentration (35.55 g MS powder+ 2.775 g CH4N2O+ 8.025 g KH2PO4+ 5 L of water) of water-soluble fertilizers applied at all the three periods of T1, T2, and T3, respectively, was found to be the best fertilizer application. In conclusion, the pipeline trunk transfusion and drip fertilizers had a significant promotion effect on the nutritional growth and photosynthetic characteristics of Chinese chestnuts; the C9 treatment was the most favorable to the nutritional growth and photosynthetic characteristics of Chinese chestnuts.
The article systematically reviewed the research status of Chinese Clematis plants in germplasm resource investigation, cultivation and reproduction, pharmacology and garden applications, analyzed the regional representative distribution of Clematis germplasm resources due to different climatic conditions, and discussed the relationship between Clematis breeding and eco-geographical response. It was concluded that temperature control, light, appropriate amount of plant growth regulator and good culture medium were effective means to improve the breeding technology of Clematis, and the medicinal chemical composition, efficacy and landscaping forms of different species Clematis from the aspect of resource value utilization were further analyzed. It was suggested that the resources of Clematis with little development potential should be protected, and cross-breeding and utilization of the germplasm with good performance in the existing Clematis resources should be done.
This article aims to explore the comprehensive application of natural medicines, microbiota, and multienzymes in the prevention and treatment of piglet diarrhea to improve the efficiency and benefits of pig farming. The healthy growth and development of piglets are crucial for the sustainable development of the pig industry. The combination of comprehensive prevention and treatment strategies, including the antiviral and antibacterial effects of natural medicines, the regulatory role of microbiota, and the digestive assistance provided by multienzymes, plays an important role in the sustainable development of pig farming. To effectively implement comprehensive prevention and treatment strategies, further research and practical application are needed to optimize the effectiveness of medicines, microbiota, and multienzymes.
To address the issue of low efficiency in existing intelligent tobacco grading models, this study focused on digital images of tobacco plant populations. Taking 31 phenotypic parameters from four main categories, including RGB color model skewness parameters, Lab color model parameters, HSV color model parameters, and leaf texture parameters, as input variables, a tobacco plant population grade classification model F1 based on the Bayesian classification algorithm was constructed. Furthermore, a core parameter-based classification model F2, utilizing the comprehensive factor loading score method, was proposed and verified. The overall accuracy of model F2 reached 82.24%, representing a 12.82% improvement compared to model F1, and the accuracy of all five grade judgments exceeded 70%. This study provides an applied theoretical basis for the development of an efficient and practical intelligent tobacco purchasing system.
The research aims to design a heat load that meets the requirements of cigar tobacco leaf drying process, screen suitable heat loads for the capacity of the drying room, and lay the foundation for the construction of cigar tobacco leaf drying rooms and the development of products with independent intellectual property rights. Building Simulation Analysis Software (DEST) was used to simulate and predict the thermal load of the enclosure structure of the drying room during the drying season. Based on the predicted results, the corresponding power was selected to verify the cigar and tobacco leaf drying. The validation results of air drying showed that the total heat load of the air drying room was the sum of the heat loss of the maintenance structure of the air drying room and the heat loss of the air drying room's dehumidification. The maximum value of the total heat load was 13.39 kW. The average heat load per kilogram of fresh tobacco leaves is 13.39 w / kg, which can be used for the heat load of cigar drying room under the condition of tobacco loading.
Cultivating world-class disciplines is an important foundation for building a world-class university. Therefore, it is of great significance to scientifically build a first-class discipline construction evaluation system to promote first-class discipline construction. As an important evaluation reference system, the third-party evaluation system must pay attention to its underlying data sources and their calculation methods. Using the underlying data of the Web of Science database and InCites scientific research analysis tools, the top five agricultural universities of China were analyzed, and the development trend was explored from the aspects of academic overall output, scientific research quality, scientific cooperation and hot topics. The construction of agricultural universities should pay attention to high-level scientific research output, promote advantages research, clearly define the development direction according to the national strategy and social needs, and carry out the discipline layout.
Design of climate quality evaluation index for Liangzhou crown pear, the method of climate quality certification of fruit quality were discussed in this paper, which provided technical support for local high quality pear climate quality certification. Using the meteorological observation data and fruit quality observation data from selected test sites from 2016 to 2022, the meteorological factors with obvious biological significance to the fruit quality of crown pear were identified through correlation analysis. Through these sensitive meteorological factors, the entropy weight method was used to establish the relationship matrix, evaluation set and weight set, and the climate evaluation index of crown pear quality. The results showed: (1)the optimum temperature indexes of the local crown pear during its growth stage were 10-16℃ at flowering stage, 12-18℃ at fruiting stage, 15-25℃ from young fruit maturity to maturity stage, and the effective precipitation was ≥0.1 mm. (2)The main meteorological factors affecting the quality of crown pear were the meteorological factors during the ripening stage and the nutrient accumulation period. (3)The meteorological evaluation of crown pear was to remove the disastrous weather effects from the suitable climatic conditions, and the evaluation results were divided into three grades: excellent, good and general. (4)Taking the observation data of crown pear in the experimental base in 2022 as an example, the fruit quality was comprehensively evaluated, and the maturity evaluation score was 86.865, which belonged to the excellent product. The comprehensive meteorological evaluation method in this paper not only differs from the existing qualitative model in module construction, but also highlights innovation in data analysis and standard establishment, which is suitable for the quantitative evaluation of the climate quality of local crown pear.
Creative leisure agriculture is an effective way to comprehensively promote rural revitalization and promote urban-rural integration development. The sustainable development of creative leisure agriculture must grasp consumers’ perceptions systematically. Thematic creative farm is a new model of creative leisure agriculture in Jiangsu Province. This study takes Jiangsu thematic creative farm as an example, using a combination of text analysis and IPA model to analyze the characteristics of tourists’ landscape preference, construct a system of landscape perception elements, conduct quantitative evaluation and propose improvement suggestions based on UGC data. The results show that the positive emotions are apparent; the satisfaction and attention levels are overall high; creative landscapes and creative experiences are priorities; facility service experience needs to be further improved. Based on this, suggestions are put forward from four aspects: improving infrastructure services, enriching landscape creative expression, creating multiple interactive experiences and strengthening scientific operations.
