河北省盐碱地综合利用的现状、问题及建议

Current situation, problems and suggestions for comprehensive utilization of saline-alkali soil in Hebei Province

  • 摘要: 盐碱地是重要的后备耕地资源, 是实现国家粮食安全的重要保障。河北省盐碱地主要包括滨海盐碱地、黄淮海平原插花盐碱地和内陆干旱区盐碱地3种类型, 是全国盐碱地的典型代表, 据统计2023年河北省盐碱地面积为38.89万hm2, 同时河北省也是我国13个粮食主产省之一, 研究河北省盐碱地综合利用对落实粮食安全战略、推动京津冀盐碱地特色农业发展具有重大意义。文章基于第二次和第三次土壤普查盐碱地专题和中间发表的相关数据, 综合分析了河北省盐碱地综合利用的现状、问题和发展路径。研究结果发现: 1)过去40多年以来, 河北省盐碱地面积呈现减少趋势, 2010年以前轻度盐碱耕地面积减少最多为23.77万hm2, 2010年后中重度盐碱耕地面积减少较多为11.11万hm2, 但是沧州市和唐山市盐碱地面积变化较小, 分别为3.37和2.49万hm2。2)河北省盐碱地综合利用取得了重要的成效, 通过耐盐适生作物品种选育、农田多水源联合利用、土壤降盐培肥等多途径多类型盐碱地综合利用技术、产品和装备的研发、模式的推广和实施, 提升了盐碱耕地质量和作物产能水平; 3)随着国家粮食安全重大战略的深入推进和人民对生活质量需求的不断提高, 盐碱地综合利用技术成熟度和渗透度、政策延续性、综合利用技术、品种的研发潜力和推广度仍有待提高。综合考虑河北省盐碱地发展进程、区域资源禀赋和现代科技发展趋势, 从关键技术创新、政产学研用、财政补贴支持和盐碱地特色农业产业等多路径方面进行分析, 提出了相应的对策和建议。

     

    Abstract: Saline alkali land is becoming one of the most important potential reserve farmland resources to guarantee the national food security with the population increased. As one of the 13 major grain producing areas in China, Hebei Province have three types saline alkali soil and are the typical kinds of saline alkali areas with an area 38.89×104 hm2, which are the representative of coastal, Huanghuaihai and inland saline alkali areas. Therefore, it is of great significance for implementing the food security strategy and promoting the development of characteristic agriculture in the saline alkali land region to study the comprehensive utilization of saline alkali land in Hebei Province. Based on the data from the second and third soil surveys on saline alkali land from the different departments, this article comprehensively analyzed the changes, current situation, problems, and development paths of comprehensive utilization of saline alkali land in Hebei Province. The findings were as follows: 1) Over the past 40 years, the area of saline alkali land in Hebei Province has shown a significantly decreasing trend with a decrease rate of 68.52%. Before 2010, most of the decreased area of saline alkali land was for the mild saline alkali land with an area 23.77×104 hm2, however, the significantly decreased area was heavy saline alkali land after 2010 with an area 11.11×104 hm2. Meanwhile, the changes in saline alkali land area were bigger in Zhangjiakou and Hengshui cities with an area of 2.33×105 hm2 and 1.12×105 hm2, were relatively small in Cangzhou and Tangshan cities with an area of 2.49×104 hm2 and 3.37×104 hm2. 2) The comprehensive utilization of saline alkali land in Hebei Province has made some important achievements in the past 40 years with some new technologies developed. Some crop new varieties with salt tolerant has been released including winter wheat, alfalfa and so on. Some researcher developed the joint utilization of multiple water sources in farmland including rainfall, shallow brackish water, soil water and so on. The soil quality improvement technologies including straw returning with the organic fertilizer application, construction of fertile cultivation layer, some specialized fertilizer, specialized equipment was developed. The joint application of new varieties, technologies, products, and equipment in various types of saline alkali lands had significantly improved the soil quality of saline alkali farmland and crop production capacity. 3) With the implementation of major strategy of national food security, the coordinated development of Jing-Jin-Ji, and the increasing demand for people’s quality of life, it is very urgent need to comprehensive utilization technology for saline alkali land. However, the maturity and penetration of comprehensive utilization technologies for different saline alkali land regions, policy continuity, comprehensive utilization technology, research and development potential and promotion of varieties still need to be improved. It also is urgent need to develop the saline alkali land characteristic industries which would be benefit for the farmer’s income and the agriculture sustainable development. According to the current situation for the food requirement, the distribution and area of saline alkali land, and the modern technologies and so on, the corresponding countermeasures and suggestions have been put forward in terms of political, industry, academia, research and application, financial subsidies and support.

     

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