塑料大棚番茄栽培不同渗灌量对耕层土壤性质的影响

Effect of subsurface irrigation quota on salt accumulation of soil in plastic greenhouse cultivated with tomato

摘要: 该文通过连续两年大棚栽培番茄的小区渗灌试验，分析比较了灌水控制下限对耕层(0～30 cm)土壤盐分积累及其离子组成、酸化等性状的影响。试验结果表明，渗灌灌水技术是防止棚内土壤退化的重要因素，灌水控制下限土壤水分吸力值越小，灌溉定额越大，耕层土壤的盐分积累越严重、pH下降幅度也越大。从土壤盐分积累、酸度变化以及作物产量、灌水次数及灌水总量等方面评价，大棚渗灌栽培番茄，当渗灌管埋深为30 cm时，将灌水控制下限土壤水吸力值选定在16～25 kPa范围内是适宜的。

Abstract: Subsurface irrigation experiments with tomato cultivated were conducted for two years to investigate the effect of watering lower limit on salt accumulation of soil surface(0～30 cm) in plastic greenhouse. The results showed that soil water suction should be controlled between 16 kPa and 25 kPa with the pipe under 30 cm soil depth, which benefited to salt accumulation control, tendency of soil pH, tomato yield, irrigation frequency and amount.