To address large seasonal temperature differences, heavy grid dependence, and manual decision-making in solar greenhouses in Shanxi Province, this study designed an intelligent temperature and humidity control system based on the NY/T 3744-2020 standard and fruit vegetable growth requirements. The system integrated Fresnel lens high-concentration photovoltaic (CPV) technology, using PV power, a charge/discharge controller, and a battery to drive fans, film rollers, and supplemental lights. The control strategy combines PID control, threshold decision-making, and battery protection rules. MATLAB dynamic simulations under typical spring and summer weather conditions (using tomatoes as an example) showed that the system achieved the required temperature and humidity control accuracy, daily power generation meets the full-day load demand, and the battery remains in a safe operating state.

Currently, the digital transformation of the entire agricultural industry chain faces common obstacles such as the structural imbalance and functional mismatch of digital infrastructure, the obstruction of the circulation of data elements and the dilemma of value release, the systematic lack of comprehensive digital talents, and the imperfect institutional guarantee and market incentive systems. To this end, it is necessary to form a sustainable development ecosystem by improving multi-party collaborative promotion mechanisms such as infrastructure co-construction and sharing mechanisms, data element circulation and governance mechanisms, talent training and collaborative innovation mechanisms, policy and institutional guarantees, and market incentive mechanisms, so as to break through the bottleneck of digital transformation of the entire agricultural industry chain, truly release the enabling effect of digital technology on the entire agricultural chain, and inject strong impetus into agricultural and rural modernization.

Took the Nanyang section of the South-to-North Water Diversion Project as an example, by analyzing the regional and engineering characteristics, types of ecological risks, and governance practices, the key links of collaborative governance were analyzed. A mechanism construction idea was proposed based on the premise of responsibility division, support of information sharing, handling of monitoring and early warning and emergency linkage as the main focus, guarantee of coordinated law enforcement and daily supervision as the support, and support of funds, personnel, and assessment and evaluation as the basis. Further optimization paths were proposed in aspects such as source reduction and ecological restoration of small watersheds, ecological compensation and behavioral incentives, resilience management during sensitive periods, social co-governance and improvement of grassroots capabilities, and full life-cycle management of projects, to promote the collaborative governance of major engineering water source areas under the constraint of high-standard water supply.

To screen out efficient pesticides for controlling the rapeseed downy mildew disease that are suitable for the ecological environment of Xizang, this experiment used the main cultivated variety Zangyou No.5 as the material, and adopted a random block design. Seven treatments were set up. Through field plot experiments, the effects of different pesticides on the control of rapeseed downy mildew, their safety, and yield were studied. The optimal control pesticide and application scheme were clarified. The results showed that there were significant differences in the efficacy, safety, and yield-increasing effects of different pesticides. Comprehensive analysis indicated that treatments A and B could be the preferred pesticides for controlling rapeseed downy mildew in Xizang. It was recommended that they be applied starting from the initial flowering stage, with a 7-day interval for two consecutive applications, and alternating use to delay the emergence of drug resistance. This experiment could provide technical support for the green disease control in the local area.

To clarify the field control effect of biological pesticides on wheat Fusarium head blight, wheat Fusarium head blight was selected as the target disease for control. A field efficacy test was conducted at the Agricultural Science and Technology Experiment Base in Shouguang City. The efficacy of Bacillus subtilis wettable powder against wheat Fusarium head blight and the safety of the crop were determined. This study confirmed that Bacillus subtilis had stable control effect on wheat Fusarium head blight under suitable environmental conditions and had high crop safety. It could replace or reduce the use of some chemical pesticides, providing scientific basis and data support for the construction of a green comprehensive control technology system for wheat Fusarium head blight.

Based on the production practice of Allium fistulosum in Linquan County, this paper systematically summarized the highyield cultivation technology system of Allium fistulosum in Linquan County from key links such as variety selection, seedling cultivation techniques, field planting and management, green control of diseases and pests, and post-harvest processing. It provided scientific and feasible technical guidance for grassroots growers and helps improve the quality and efficiency of the Allium fistulosum industry in Linquan County.

To address the issues of low standardization in the cultivation of medicinal Chrysanthemum morifolium in Xiuning County, as well as the lax management in the field, based on the local subtropical monsoon climate, mountainous and hilly terrain, and characteristics of red and yellow soils, combined with the quality requirements of Chrysanthemum morifolium Huangshan Gongju, a systematic integration of key technologies such as site selection and preparation, seedling cultivation, field regulation, and green control was carried out to form a standardized technical system that could directly guide farmers' operations. This provided technical support for improving the quality and efficiency of the Chrysanthemum morifolium industry in Xiuning County and promoting rural revitalization.

This paper explored the influence mechanism of the density, stiffness, damping, and acoustic properties of impeller materials on the vibration and noise of pumps. Combined with the measured data from typical pumping stations in hydropower engineering, the vibration and noise performance of pumps with different material impellers was analyzed, providing a theoretical basis for pump noise reduction design and material selection.

To screen out efficient control agents for wheat stem-end rot disease in Juye area of Shandong Province, a field comparison experiment of six agents was conducted from 2023 to 2024. The results showed that the 48% oximeoxazoline·zoxamide (T₃) treatment had the best efficacy. From the emergence stage to the filling stage, the disease index decreased by 56.1%, 56.7%, and 58.3% compared with the control (CK) without treatment, significantly inhibiting the spread of the disease. At the same time, this treatment promoted the growth of wheat seedlings, with an increase of 5.3%, 9.1%, and 19.2% in plant height, root length, and tiller number, respectively. The number of grains per spike and the thousand-grain weight increased by 8.2% and 6.1%, respectively, and the final yield increased by 14.8%, making it the best among the six treatments. Therefore, it was recommended as the preferred control agent for wheat stem-end rot disease in the local area to achieve the dual goals of disease green control and yield increase.

The typical maize-growing area in Tancheng was selected as the experimental area, and traditional round rollers, multi-angled rollers, and rigid-flexible coupled rollers were selected for field comparative experiments. The results showed that the rigid-flexible coupled roller performed better in reducing the grain breakage rate, drop rate, and improving the fruit ear integrity rate, and had certain advantages in energy consumption control and operation efficiency. The results of orthogonal experiments and variance analysis indicated that the roller speed and roller gap had significant effects on the loss reduction effect, with the optimal combination being a roller speed of 950 r/min and a roller gap of 30 mm. The mechanism analysis showed that the flexible buffer layer could effectively disperse the impact force, improve the force state of the fruit ear, and thereby reduce the risk of grain damage. This study provided theoretical basis and practical reference for the structural optimization and parameter matching of the ear-threshing device of maize harvesters.