Water-solublenutrient concentrations in runoff of phosphorus, potassium and bromine ions in the beginning minutes of runoff, runoff in high concentrations, followed by rapid decay.
径流中养分浓度水溶性磷、钾离子和溴离子在开始产流几分钟内，径流浓度很高，随后迅速衰减。
2
The first cut herbage were selected to study the effect of different harvest time and drying methods on the content of nutrient as watersoluble carbohydrate (WSC).