Core Insights - The article highlights the significant advancements in China's oilseed rape industry, particularly through the introduction of the new variety "Zhongyouza 501," which has achieved record-high yields in various conditions [1][2]. Group 1: Crop Performance - "Zhongyouza 501" achieved an average yield of 377.68 kg per mu during a demonstration in Jiangsu, setting a new record for mechanical harvesting of winter oilseed rape in China [1]. - In a semi-arid region of Shaanxi, "Zhongyouza 501" yielded 312.23 kg per mu on moderately saline-alkaline land, doubling the local average yield under extreme drought conditions [2]. Group 2: Technological Integration - The high-yield demonstration in Jiangsu utilized integrated cultivation techniques, including precision sowing, optimized water and fertilizer use, and green pest control, showcasing a replicable model for large-scale oilseed production [1]. - The "double density and double high" technology model, centered around "Zhongyouza 501," has been promoted across over 2 million mu in the Yangtze River basin since the autumn sowing of 2024 [2]. Group 3: Recognition and Future Prospects - The Ministry of Agriculture and Rural Affairs has included "Zhongyouza 501" in the list of national leading agricultural varieties for 2024 and the catalog of excellent crop varieties for promotion in 2025 [2]. - The successful performance of "Zhongyouza 501" in high-yield competitions across Jiangsu, Hubei, and Sichuan demonstrates its potential to enhance national oilseed self-sufficiency and support farmers' income growth [2].

Core Viewpoint - The new rapeseed variety "Zhongyouza 501" developed by the Chinese Academy of Agricultural Sciences has set a record for oilseed yield in moderately saline-alkaline soil, demonstrating strong drought and salt-alkali resistance, which is crucial for agricultural productivity in challenging conditions [1][2]. Group 1: Agricultural Innovation - "Zhongyouza 501" is the only significant achievement in the field of biological breeding for rapeseed in China, developed over ten years, featuring traits such as high yield, high oil content, and resistance to salt-alkali and diseases [2]. - The variety maintains high photosynthetic efficiency under drought and saline-alkaline stress conditions, utilizing a planting density of over 30,000 plants per acre to enhance water and fertilizer efficiency [2]. Group 2: Performance and Impact - In a demonstration field in Shaanxi, "Zhongyouza 501" achieved a mechanical harvest yield of 312.23 kg per mu (approximately 0.067 acres) despite adverse conditions, with soil salinity reduced by 20% compared to surrounding areas [1]. - The variety has set high yield records in multiple provinces, including 302.11 kg per mu in Hubei and an average of 377.68 kg per mu in Jiangsu, establishing new benchmarks for winter rapeseed production in China [2].

Core Viewpoint - The development of the new rapeseed variety "Zhongyouza 501" represents a significant achievement in China's oilseed breeding sector, showcasing high yield and oil content, which is crucial for enhancing domestic edible oil supply security [2][3]. Group 1: New Variety Development - "Zhongyouza 501" was cultivated by a team led by Academician Wang Hanzhong over ten years, achieving an average oil content of 50.38% and a yield of 107.35 kg per mu, surpassing the control by 26.93% [2]. - The variety set new yield records in multiple regions, including 419.95 kg per mu in Hubei and 303.8 kg per mu in Jiangsu, demonstrating its resilience and high productivity under adverse conditions [2][3]. Group 2: Technological Innovations - The "Late Sowing Double Density Double High" technology, developed alongside "Zhongyouza 501," allows for delayed sowing past October 10, mitigating risks associated with early sowing and enhancing yield stability [3][4]. - This technology integrates high-density mechanized precision sowing, nutrient release fertilization, and comprehensive disaster prevention measures, supporting the expansion of rapeseed cultivation and yield improvement [3][4]. Group 3: Industry Support and Outreach - The Chinese Academy of Agricultural Sciences has established an expert team to provide extensive technical support across major rapeseed-producing provinces, conducting over 500 technical service sessions and training more than 58,000 individuals [4]. - The initiative aims to promote the adoption of high-yield varieties and innovative cultivation techniques, significantly impacting local agricultural productivity and contributing to national edible oil supply stability [4].

Core Insights - The new rapeseed variety "Zhongyouza 501" developed by the Chinese Academy of Agricultural Sciences is set to achieve large-scale high yields with the accompanying "late sowing double density double high" technology [1][2] - The average yield in a demonstration field reached 341.47 kg per mu, approximately double the average yield in Sichuan province [1] - The annual planting area of rapeseed in China is around 117 million mu, making improvements in rapeseed yield crucial for ensuring edible oil supply security [1] Group 1 - "Zhongyouza 501" has an average oil content of 50.38% and an oil yield of 107.35 kg per mu, which is 26.93% higher than the control [1][3] - The "late sowing double density double high" technology addresses issues such as late spring cold damage and root swelling disease, allowing for sowing after October 10 [2] - The technology supports the expansion of rapeseed area, increases yield, and stabilizes production [2] Group 2 - "Zhongyouza 501" has been included in the 2024 agricultural leading varieties and the 2025 national excellent crop variety promotion directory by the Ministry of Agriculture and Rural Affairs [3] - The application of this technology in major rapeseed production areas is expected to alleviate land competition issues in the Yangtze River basin and increase rapeseed oil production by over a million tons annually [3] - The initiative aims to replace some imported soybean oil with low-erucic acid rapeseed oil, enhancing the health standards of edible oil for residents [3]