摘要
滨海盐土水旱轮作区的地下水位和矿化度,受气候、季节、土壤及河沟水诸因素影响,全年波动性很大,且两者呈明显的负相关;在同一田块的不同位置亦有较大差异。水位的变化受灌溉水、降雨量、河水位影响更加突出。地下水pH值比地上水稳定且未碱化。地下水和地上水的化学组成基本相近,均属氯化物-钠型水。Cl^-、Na^+与矿化度呈高度正相关,可建立模式推导,推导结果数据极为可靠。
The groundwater level and minearalization rate in paddy-upland rotation fields along the coastal saline soil region are affected by various factors such as climate, season, topography, soil and river water for irrigation and drain water. Both the groundwater level and mineralization rate fluctuate greatly within a year. The curves of the two parameters not only assume obviously a negative correlation but also much more difference at distinct positions in the same strip check. The water level is much more affected by irrigation water, rainfall and river water level.
The pH value of groundwater is more stable than that of surface water and it hasn' t been alkalized. The chemical compositions of the two kinds of water which belong to chloride, sodium-type water are basically similar, Both Cl^- and Na^+ values and the mineralization rate present evidently a positive correlation.
出处
《上海农业学报》
CSCD
1992年第4期38-42,共5页
Acta Agriculturae Shanghai
关键词
滨海盐土
水旱轮作区
地下水
Coastal saline soil, Paddy-upland ratation field, Groundwater, Mineralization rate, Water level
