不同矿化度咸水造墒对棉花出苗及幼苗生长的影响

采用坑栽土培试验和桶栽土培试验，研究了不同矿化度咸水造墒对3种土壤质地(粘壤土、壤土和沙壤土)条件下棉花出苗率和幼苗生长的影响。结果表明，矿化度低于3 g/L的微咸水造墒对棉花出苗率及幼苗的生长影响不明显，有时甚至表现为促进作用,但随着造墒水矿化度的进一步增加,棉花的出苗率、出苗时间以及株高、干物质累积等都受到不同程度...

Effects of Different Salinity Water for Increasing Soil Water before Sowing on Cotton Emergence and Seedling Growth

The effect of different salinity water for increasing soil water before sowing on cotton emergence and seedling characters in different soil texture was studied with pit and barrel experiments in the soil.Results showed that irrigating saline water below 3 g/L made no obvious inhibiting effect on cotton seedling growth,partly showed a positive effect.With the further increasing of salinity,the cotton seedling emergence rate,emergence time,plant height,dry matter accumulation,etc were restrained in different degrees.The highly significant effect showed when the mineralization is over 5 g/L.Under the same salinity of irrigation water,the growth traits of cotton seedling in loam soil and clay loam treatments were better than which in sandy loam treatment.The root-shoot ratio of cotton seedling in clay loam soil first increased and then decreased with increasing of irrigation water salinity.The experiment indicated that increasing soil water by using ground saline water before sowing is feasible in the regions that have rare surface fresh water,but the mineralization should be below 3 g/L.