藁城县是一个有名的农业高产县。1986年,全县粮食亩产746公斤,棉花亩产73.2公斤。在这种形势下,要保持和增加农业生产的后劲,使粮食生产再上新台阶,除了不断更新优良品种和优化栽培措施外,最根本的问题就是增强地力。目前,由于农村产业结构的变化和商品经济的发展,部分农村在农业生产上出现了重产业、轻投入,重化肥、轻有机肥,重氮肥、轻磷肥的偏向,有的甚至不施有机肥。致使土壤物理性状恶化,氮 Tancheng County is a famous agricultural high-yielding county. In 1986, the county’s grain yield 746 kilograms, 73.2 kilograms of cotton per mu. Under such circumstances, the most fundamental issue to maintain and increase the stamina of agricultural production and to bring grain production to a new level is to enhance the fertility in addition to continuously updating fine varieties and optimizing cultivation measures. At present, due to the changes of rural industrial structure and the development of commodity economy, some rural areas appear to have heavy industry, light inputs, heavy chemical fertilizers, light organic fertilizers, heavy nitrogen fertilizers and light phosphorus fertilizers in agricultural production. Some of them even do not apply organic fertilizers . Lead to deterioration of soil physical properties, nitrogen