Effect of paddy-upland rotation on soil salinity in Salinized facility soil
To study the effect of paddy-upland rotation on the salinity of salinized soil in horticultural facilities,water spinach (Ipomoea aquatica Forsk) and chrysanthemum (Dendranthema morifolium (Ramat.) Tzvel.) were planted successively in a multi-span greenhouse during a 5-months period.Soil samples were obtained in the depth of 0-10,10-20,20-30 and 30-40 cm every month during the experiment.The EC value and content of main salt ions of each sample were determined.The results showed that one month after water spinach planting,the EC value declined largely in 0-20 cm soil layer,but increased in 30-40 cm layer;Two months later,after water spinach was harvested and water was drained in the paddy field,the EC value of all soil layers dropped significantly (between 60.27％-81.84％).One month after draining,chrysanthemum was planted and the EC value in all soil layers increased slightly.The value of soil EC increased continuously during chrysanthemum growth for 1-2 months,but still significantly lower than that before water spinach planting.The contents of major salt ions,especially those associated with fertilizers,also showed a similar pattern in different soil layers.Concluded that rotation with aquatic vegetables in conventional horticultural facilities is beneficial to mitigate soil salinization.
Ipomoea aquaticaDendranthema morifoliumpaddy-upland rotation in facilitysalinizationsoil salinity
国家科技期刊平台
NSTL
万方数据
维普
