泰州市三大农区土壤肥力变化趋势及原因分析

通过 4年土壤监测数据分析表明 ,里下河农区与沿江圩区土壤基础地力较高 ,产出能力(常规管理条件下的产量 )也较强 ;高沙土农区基础地力较为瘠薄 ,产出能力较弱 ;不同农区与不同年度间有显著的互作效应 ;对投肥水平与耕地养分含量的关系分析认为 ,提高施肥水平是增强土壤地力的关键。

Studies on the variety tendence and it's cause of soil fertility in TaiZhou's three farming regions

The datas of crop yield?fundamental productivity?fertilizing structure mensurated in the immobile arable land's from 1997 to 2000 were analysed.The main results were as follows.The fundamental productivity in Lixiahe Farming region and along lower reaches of the Changjiang River was higher than that in high-sandy region relatively.The productive ability(the yield of routine management) was higher than that in high sandy region too. There was significant reaction between two factors of farming region and year.The relation between fertilizing structure and the content of arable land's nutrient was analysed. The results was that improving fertilizing structure was the key to improving the soil fertility.