Core Insights - The comprehensive utilization of saline-alkali land is crucial for ensuring national food security and stabilizing China's food supply [1] - The Chinese government emphasizes the importance of improving soil quality and expanding arable land through the development of saline-alkali areas [1] Group 1: Current Status and Importance - China has 1.5 billion acres of saline-alkali land, with 500 million acres having potential for development [1] - The third national land survey has identified the distribution and area of saline-alkali land, providing a foundation for targeted remediation efforts [2] Group 2: Technological Innovations and Practices - In Jilin Province, the average yield of rice on treated saline-alkali land has exceeded 600 kg per mu, approaching the levels of black soil [3] - Various remediation techniques, such as organic silicon agents and gypsum, are being explored to improve soil conditions [3] - The National Saline-Alkali Land Comprehensive Utilization Technology Innovation Center has developed 68 new salt-tolerant crop varieties, with 20 officially registered [4] Group 3: Agricultural Development and Future Prospects - The promotion of salt-tolerant crop varieties, such as 'Xiao Yan 60', has led to significant increases in yield, with some farmers reporting 1,000 jin per mu [6] - Saline-alkali land is being transformed into productive agricultural areas, contributing to the overall agricultural industry and enhancing food security [6] - The comprehensive utilization of saline-alkali land is supported by national pilot programs, indicating a promising future for agricultural development in these areas [6]

Core Viewpoint - The development and successful cultivation of salt-tolerant wheat varieties, particularly Hangmai 802, demonstrate significant agricultural advancements in saline-alkali land, which is crucial for enhancing food security in China. Group 1: Wheat Cultivation Results - In Dongying, Shandong, the Hangmai 802 wheat variety achieved a yield of 554.6 kg per mu in a saline-alkali demonstration field [1][2] - In Huanghua, Hebei, the same variety yielded 496.6 kg per mu without artificial irrigation, relying solely on rainfall [1] Group 2: Characteristics of Saline-Alkali Land - Saline-alkali land presents challenges for crop cultivation due to high salt content, requiring innovative agricultural practices [2][9] - The soil in the demonstration fields has varying salt concentrations, with Dongying at 3.01‰ and Huanghua at approximately 3.39‰ [2][4] Group 3: Development of New Wheat Varieties - Several salt-tolerant wheat varieties, including Jingmai 12, Jingmai 188, and Jimai 60, are being cultivated alongside Hangmai 802 to improve yields in saline-alkali conditions [3] - The new varieties exhibit traits such as stronger stems, larger root systems, and broader leaves, enhancing their ability to thrive in harsh environments [7] Group 4: Agricultural Techniques and Innovations - The cultivation of Hangmai 802 is supported by advanced agricultural techniques that focus on salt control and efficient water use [8] - The integration of modern green agricultural practices has improved the productivity of saline-alkali land [8][10] Group 5: National Food Security Strategy - China has over 50 million acres of saline-alkali land, with 18.5 million acres deemed suitable for agricultural use, making its development vital for food security [9] - The shift in strategy from soil improvement to the cultivation of salt-tolerant crops is a key focus of national agricultural policy [9][10] Group 6: Collaborative Research Efforts - Since 2022, a national collaborative effort involving 55 research institutions and enterprises has been established to develop salt-tolerant crops, including wheat, rice, and corn [10] - The initiative has led to the identification and promotion of numerous salt-tolerant crop varieties, enhancing agricultural resilience [10]