osmometer,permeator

The leaching losses of indigenous and applied nitrate-nitrogen were measured for the non-weighing lysimeter in soils under the condition of winter wheat cropping.

观测了地中渗透计的土壤在 3种不同施肥量下冬小麦自播种至返青期硝态氮的淋洗动态 ,由试验资料获得了硝态氮在土壤中迁移时间的概率密度函数 ,进而运用传递函数模型对土壤排水出流液中的硝态氮浓度和淋洗量动态进行了数学模拟和预报。