不同地下水位田块油菜硫肥效应的研究

Effects of sulphur fertilizer on rapeseed under different groundwater table

通过在长江下游沿江平原不同地下水位田块上种植油菜,对不同硫源硫肥的生物效应进行了研究。结果表明,在地下水位为1.5 m时,施用硫肥产生的效果较地下水位为0.8 m的各处理明显,表现为可以改善油菜的农艺性状,提高产量,促进油菜对硫的吸收,提高油菜籽含硫量、含氮量和粗脂肪含量。同时,在一定程度上缓解了油菜感染菌核病的程度。在不同地下水位条件下,ES1处理效果好于ES2处理,而SSP2处理效果好于SSP1处理。本试验条件下,每公顷施用60 kg的硫就可满足作物的需要,获得较好的产量、品质。

Studies were conducted on the effects of different fertilizer on rapeseed through carrying out field experiments on lower Yangtze plain.The results indicated that in the field where the groundwater table（GWT） was 1.5 m,the effects of sulphur fertilizer on the rapeseed were more significant than those in the field where the GWT was 0.8 m.Details were as follows： S application improved rapeseed agronomic characteristics,increased rape-seed yield,promoted the absorption of S and improved content of S and N and crude fat,meanwhile,alleviated the infection of rapeseed sclerotiniose to a certain extent.For S fertilizer effect,treatment ES1 was better than ES2.While for superphosphate,treatment SSP2 had much significant effect.The results also suggested that the application of 60 kg sulfur fertilizer per hectare could meet rapeseed’s need and get good yield and quality