以多年连续种植甜瓜的日光温室为研究对象，在上茬甜瓜收获后于夏闲期分别采用未进行土壤处理（-RSD）、玉米秸秆还田+灌水强还原灭菌（RSD）和玉米秸秆还田+未进行灌水强还原灭菌（CK）方式，对温室土壤进行处理，通过对比3个处理的温室土壤基础指标（有机质、全氮、硝态氮、铵态氮、速效磷、速效钾、pH和电导率）、根结线虫数量以及下茬甜瓜的单瓜重、含糖量情况，考察灌水强还原处理对日光温室连作的影响。结果表明，与-RSD处理相比，RSD处理的（0，20] cm土层土壤有机质含量略有增加，有效磷、速效钾含量和电导率则均呈现不同幅度的下降，硝态氮含量在（0，40] cm土层大幅度下降，全氮和铵态氮含量变化不明显；RSD和CK处理的土壤pH分别呈升高和降低趋势，这与反硝化作用消耗H⁺和秸秆分解产生有机酸之间的平衡有关；与-RSD处理相比，RSD处理的土壤中根结线虫得到了有效抑制，消杀率达79.6%；与CK处理相比，RSD处理的单瓜重增加了0.091 kg，差异无统计学意义（P>0.05），明显提高了下茬甜瓜的中心含糖量（P<0.05）。本研究为大规模示范推广灌水强还原技术，促进设施瓜菜作物绿色高质量发展提供参考。

A solar greenhouse that had been continuously planting melons for many years was taken as the research object. The greenhouse soil was treated with no soil treatment (-RSD), corn stalk returning to the field + intensive reduction sterilization (RSD) and corn stalk returning to the field + no intensive reduction sterilization (CK), respectively, after the harvest of the previous crop. The basic indicators of the greenhouse soil before and after treatment (organic matter, total nitrogen, nitrate nitrogen, ammonium nitrogen, available phosphorus, available potassium, pH, and electrical conductivity), the number of root-knot nematodes, as well as the weight and sugar content of the subsequent melon crop were compared in the three treatments to investigate the effects of intensive reduction by irrigation on continuous cropping in solar greenhouse. The results showed that, compared with -RSD treatment, the content of soil organic matter in the (0, 20] cm soil layer treated with RSD was slightly increased, while available phosphorus, available potassium, and EC values all showed varying degrees of decrease. The nitrate nitrogen content in the (0, 40] cm soil layer significantly decreased, and the change in total nitrogen and ammonium nitrogen content were not obvious. The pH of soil treated with RSD and CK showed an increasing and decreasing trend, respectively, which was related to the balance between the consumption of H⁺ by denitrification and the production of organic acids from straw decomposition. Compared with -RSD treatment, root-knot nematodes in soil treated with RSD were effectively inhibited, and the elimination rate reached 79.6%. Compared with CK treatment, the weight of individual melons increased by 0.091 kg after the strong reduction treatment, there was no statistically significant difference (P>0.05), and the sugar content of the subsequent melon crop was significantly improved (P<0.05). This study provides a reference for large-scale demonstration and promotion of irrigation and strong reduction technology to promote the green and high-quality development of facility melon and vegetable crops.