渭南盐渍土的性质及改良利用

The Properties and Improving Utilization of Practices of Salinized Soils in Weilan Area

渭南盐渍土有盐化塿土,盐化潮土和草甸盐土3类,属氯化物硫酸盐或硫酸盐氯化物盐土;其周年水盐运动可明显分为雨季脱盐(6～11月)和旱季积盐两个阶段;是“旱、涝、盐、瘦”相伴共存的一种低产土壤。改良中需综合运用水利、生物、农业措施,主要是开沟排水;种稻洗盐;淡水灌溉;引洪淤灌;种植绿肥;麦糠覆盖;因地种植;合理耕作及轮间套种等。

There are salinization Lou soil,salization damp soil and meadow saline of three groups of salinzed soils in Weilan area. They fall into chloride - sulphate or sul-phatechloride saline soil. Water and salf movement in the above soils can annually be divided into desalt stage in the rainy season(from June to November)and salt acumulating stage in the dry season. The salinized soil with drought,waterlogging,salt and sterility is one type of low output soils. The comprehensive practices of water conservancy,biology and agriculture are used to improve the soils including openning trenches to drain soil water,leaching soil salt by planting rice,irrigating the land with fresh irrigati on water, irrigation and siltation by diverting flood water,planting green manure crops,multching with wheat straws,planting crops suitable to the lands,rational cultivation or tillage and rational rotation and intercropping,etc.