This experiment was conducted in Quanjiao County. Using the indica-type three-line hybrid rice variety Jiuyouyuehesi as the material, five fertilization treatments were set up to study the effects of different ratios of slow-release and controlled-release nitrogen fertilizers on rice yield, nitrogen fertilizer utilization rate, and economic benefits. Slow-release and controlled-release nitrogen fertilizers could effectively coordinate the population structure of rice, improve nitrogen absorption efficiency, and reduce nitrogen loss. This was a fertilization mode suitable for the simplified and efficient production of rice in Quanjiao County.

Rare native tree species are an important part of the national forest and have significant ecological, economic and social implications. This paper selected four rare native tree species as the research objects and discussed the techniques for creating artificial multi-layer mixed forests.

To clarify the application effect of different proportions of commercial organic fertilizer replacing chemical fertilizers in rice production in Tongcheng City, using Y-liangyou 900 as the experimental material, 5 substitution ratio treatments were set up. Through a randomized block field experiment, the influence on the yield components, yield and economic benefits of rice was explored. Both 25% and 50% substitution of commercial organic fertilizer for chemical fertilizers were economically feasible fertilization methods. Among them, the 50% substitution had the best comprehensive effect and could provide scientific fertilization basis for the green, high-quality and efficient production of Y-liangyou 900 in Tongcheng City.

To explore the high-yield and high-quality cultivation mode of summer soybeans suitable for the ecological conditions of Jinping County, using the local main variety Qiandou No.12 as the material, three sowing methods and three fertilization levels were set up, resulting in a total of 7 treatments. The effects of different treatments on the agronomic traits, yield, and quality of soybeans were studied. The results showed that different treatments had significant effects on soybean plant height, number of pods per plant, number of seeds per pod, hundred-grain weight, and seed yield. Under the ecological conditions of Jinping County, the combination of wide and narrow row sowing (60 cm+40 cm) and 300 kg/hm² compound fertilizer was a preferable cultivation mode for achieving high yield and high quality of Qiandou No.12.

This paper introduced the principles, characteristics and advantages of mechanized deep plowing technology, and sorted out the practical obstacles that prevented farmers from adopting this technology. It also analyzed the shortcomings of the current support system in aspects such as subsidy distribution, supporting services, and supervision and publicity, and proposed improvement measures from dimensions such as differentiated subsidy design, agricultural technology support guarantee, and publicity and training, with the aim of optimizing the promotion system of deep plowing technology and facilitating soil conservation and the green and sustainable development of agriculture.

To investigate the effects of close planting and water‑nitrogen coupling on the yield of seed maize and its formation process, a three‑factor orthogonal design was employed in this study, with three irrigation levels, three nitrogen application levels, and three planting densities. The regulatory effects of different treatments on agronomic traits, dry matter accumulation, yield components, and yield of seed maize were systematically analyzed. The results showed that different treatments had varying effects on agronomic traits, dry matter accumulation, yield components, and yield of seed maize. Among them, the W₂N₁D₃ treatment exhibited relatively high levels of kernels per row and single ear weight, and achieved the highest yield of 687.95 kg/667m², which was significantly higher than those of the W₃N₂D₁ and W₂N₀D₁ treatments. It was recommended that in this region, an irrigation amount of 250 m³/667 m², nitrogen application rate of 15 kg/667m², and planting density of 85 000 plants/667m² (W₂N₁D₃) be adopted to achieve both high yield and high efficiency in seed maize production.

This paper took Nanyang City as the research object, focusing on the "low air+cultural and tourism" integrated innovation development model, deeply exploring the rural characteristics, and had explored a sustainable practical path that was in line with the local reality. By reviewing the development status, achievements and existing problems of the "low air+cultural and tourism" projects in Nanyang City, based on the unique rural resource endowment of Nanyang City, specific solutions were proposed to promote the integrated development of the "low air+cultural and tourism" projects in Nanyang City, and also provide reference and inspiration for the integrated development of Low Air Economy and rural cultural tourism in similar regions.

The research focused on leveraging technology to promote the high-quality development of rural economy. Based on the development demands of rural industry prosperity, integrated urban-rural development, and green agricultural transformation, it examined the current practical situation of technology empowerment in rural economy. The research revealed that in the current process of rural economic development with technology support in China, there were four major problems. These problems restricted the deepening and implementation of technological elements in the entire rural industrial chain. To address these core issues, four dimensions-infrastructure upgrading, scientific and technological innovation achievement transformation talent team building, and system improvement were proposed to optimize in a coordinated manner. This could provide practical references for county-level regions in Southwest China to promote science and technology-driven agriculture and help improve the quality and efficiency of rural economy.

In the context of the low-altitude economy, this paper systematically explored the theoretical basis and industrial chain composition of the integration of general aviation and rural tourism. The study revealed that the current situation of rural tourism resources and aviation infrastructure in Henan Province was facing challenges such as airspace approval bottlenecks, insufficient human resources and operational capabilities, product homogeneity, and inadequate safety guarantees. To address these issues, this paper proposed four strategies to promote the deep integration and sustainable development of the low-altitude economy and rural tourism in Henan Province.

In response to the problems of fragmented mountainous farmland and low light energy utilization rate, this paper conducted field experiments using the soybean-maize strip intercropping method as the research object. It compared the yield differences among different planting patterns, density configurations, and variety combinations, analyzed the mechanism of increasing yield through appropriate variety combinations adapted to mountainous environments, and selected the optimal variety combination scheme and field configuration system suitable for the mountainous areas of Southwest China. This provided theoretical support and practical basis for the selection of superior varieties, improvement of quality and efficiency, and the large-scale promotion of technology for strip intercropping in mountainous areas.