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延边地区位于吉林省东北部,系朝鲜族自治州.是我国著名北方稻区之一,是北方稻区水稻栽种历史较长的地方.水稻是当地的主要粮食作物,也是当地的高产作物,据全州14年间(1949—1962年)统计,水稻播种面积占全州总播种面积的21%.而水稻总产量却占全州农作物总产量的三分之一.所以历年水稻产量的高低直接影响着当地粮食总产量的升降.因此各级领导和广大农民群众都十分重视水稻生产问题.稻田土壤是水稻生长发育的基地,稻田土壤肥力的高低和性能好坏直接影响着水稻生育和产量的高低,所以各地农民群众都十分重视水稻土的利用管理和培肥问题.一、本地区稻田土壤的特点、类型和分布本区气候属于北方近海洋性暖流气候区,无霜期120—150天,年平均气温3—5℃,适于一季水稻生长.
Yanbian is located in the northeast of Jilin Province, the Department of Korean Autonomous Prefecture .Is one of the famous northern rice area is a long rice planting area in the northern rice paddies. Rice is the local main food crops, but also the local high-yield crops, according to the whole In the 14 years (1949-1962) of the state, the sown area of rice accounted for 21% of the total sown area of the state, while the total output of rice accounted for one third of the total output of the state’s crops. Therefore, the level of rice production in the past years directly affected Therefore, the leaders at all levels and the masses of peasants attach great importance to the issue of rice production.The paddy soil is the base of rice growth and development, the soil fertility and the performance of rice fields directly affect the level of rice growth and yield, Therefore, farmers all over the country attach great importance to the management and cultivation of paddy soils.First, the characteristics, types and distribution of paddy soils in this area The climate in this area belongs to the near-oceanic warm current climatic zone in the north with a frost-free period of 120-150 days and annual average temperature 3-5 ℃, suitable for a quarter of rice growth.