上海市的设施土壤,由于受到栽培、灌溉、施肥等人为条件和地下水位高、濒临东海等环境条件的影响,次生盐渍化程度明显,土壤板结现象严重,灌溉水不易下渗。上海现有的设施少有暗管系统,灌水洗盐效果不佳。本文根据客土改良的原理,将一种非盐渍土按不同比例掺进次生盐渍土,探讨混合土壤对作物生长的影响。结果表明,与原设施次生盐渍土相比,随着非盐渍土掺入比例的提高,混合土壤盐分含量明显降低,速效氮和速效磷含量稍有增加,西瓜的产量和质量均有较大程度的提高和改善。供试盐渍土与非盐渍土混合比为1∶1时,土壤的盐分增加少,养分均衡,西瓜品质好,同时成本低、简便易行。 Due to the artificial conditions such as cultivation, irrigation and fertilization, and the high groundwater level, the facilities in Shanghai are affected by the environmental conditions such as the East China Sea. Secondary salinization is obvious, soil compaction is serious, irrigation water is not easy to infiltrate. There are few existing underground pipe systems in Shanghai, and irrigation and salt washing are ineffective. According to the principle of guest soil improvement, a kind of non-saline soil was mixed into secondary saline soil with different proportion to discuss the influence of mixed soil on crop growth. The results showed that compared with the secondary saline soils of the original facilities, with the increase of the proportion of non-saline soils, the content of salt in the mixed soils decreased obviously and the content of available nitrogen and available phosphorus increased slightly. The yield and quality of watermelon A greater degree of improvement and improvement. When the mixture ratio of test saline soil to non-saline soil is 1: 1, the salt content of the soil is less increased, the nutrients are balanced, the watermelon quality is good, the cost is low, and the method is simple and easy to operate.