任书生,刘克荣,董博,董青松



摘要:依据两当县耕地地力评价成果,对两当县中低产田的分布及类型进行了划分。结果显示,两当县中低产田面积占全耕地总面积的84.94%,其中中产田和低产田分别占全县耕地总面积的29.57%、55.37%。根据影响中产田和低产田作物生长和产量构成的因子,对照全国中低产耕地类型并结合当地自然资源特点,将两当县中低产田划分为坡地梯改型、瘠薄培肥型2种类型,其中以瘠薄培肥型中低产田面积较大,为11 041.03 hm2;而坡地梯改型中低产田面积较小,为5 507.21 hm2。今后两当县农业生产中应注重有机肥施用和秸秆还田的技术应用,着力提升两当县中低产田耕地质量。
关键词:中低产田;障碍因子;研究;两当县
中图分类号:S158 文献标志码:A 文章编号:1001-1463(2017)11-0045-04
doi:10.3969/j.issn.1001-1463.2017.11.015
Study on Division of Medium-low-yield Field for Liangdang County and
Its Types of Obstacles
REN Shusheng 1,LIU Kerong 1, DONG Bo2, DONG Qingsong 3
(1. Liangdang Agro-technology Extension Center, Liangdang Gansu 742400, China;2. Institute of Dryland Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou Gansu 730070,China;3. Gansu Engineering and Technology Research Center for Smart Agriculture, Lanzhou Gansu 730070,China)
Abstract:Based on cultivated land evaluation of Liangdang county, the results show that the low yield farmland area accounted for 84.94% of the total area, where the middle and low yielding fields respectively the county accounted for 29.57% of the total area of arable land, 55.36%; according to the factors affecting the middle and low yield field crop growth and yield components, the control division of the medium low yield farmland types, combined with the characteristics of local natural resources, the low yield field in Liangdang county is divided into Sloping ladder modified, barren fertilizer type, the barren fertility type area is 11 041.03 hm2, accounting for Liangdang county medium low yield farmland area 66.72%, the technology application of organic manure and straw on agricultural production, improve the quality of cultivated land.
Key words:Medium-low-yield Field;Obstacle factor;Study;Liangdang county
由于自然條件的限制和农田基本设施薄弱等原因,导致两当县虽耕地数量较大,但作物产量低而不稳,严重困扰着当地农村经济的发展和农民生活水平的提高。本文结合两当县耕地地力评价结果和土壤类型、地貌类型等因素,对两当县中低产限制因素进行了深入分析,并依照各类限制因素划分障碍类型,提出了具体的改造技术与措施,以期为增强两当县农业综合生产能力,优化农业产业结构,提高土地利用率和产出率提供技术支撑。
1 耕地地力质量概况
通过在两当县县域耕地资源管理信息系统中建立耕地潜在地力评价模型,将两当县耕地地力分为四级[1 ]。其中,一等地主要分布在城关镇、金洞乡、西坡镇、显龙乡、兴化乡、杨店乡、鱼池乡、站儿巷镇、左家乡等9个乡镇的部分区域,该区域多属于河流低阶地和丘陵,耕地土壤较肥沃,日照充足。……