摘要
硫是作物生长的重要营养元素之一。１９９１～１９９２ 年开展了土壤硫素肥力调查，弄清了贵州省耕地土壤全硫、有效硫的含量情况。在不同类型土壤上布置２１ 个田间试验，研究硫肥对水稻、玉米、小麦、油菜的效果。调查结果表明，贵州土壤平均有效硫与全硫量达到５５ ｍ ｇ ｋｇ－ １与４１９ ｍ ｇｋｇ－ １，这比南方其他各省都高。在２１ 个田间试验中有１５ 个试验施用硫肥增产达５％ 以上。工业副产品磷石膏作为硫源比普钙、石膏、硫酸钾及硫横粉好。田间试验证明当土壤有效硫含量低于３０ ｍ ｇ ｋｇ－ １时有较好施硫效果，这在贵州或许可作为缺硫或潜在性缺硫指标，在贵州大约有１／３ 土壤低于该值。为了作物高产稳产需求，建议在贵州缺硫或潜在性缺硫土壤上硫肥试用量为３１５～６０ｋｇ／ｈａ。
Sulphur is an important nutrient in crop production.An extensive survey of sulphur in soils was conducted in 1991 and 1992 to determine sulphur content in soils of Guizhou province.Over 21 field trials were conducted in different soils to show the sulphur responses to rice,corn,wheat,and rapeseed.The results showed that the average available sulphur and total sulphur contents were 55 mg kg -1 and 419 mg kg -1 ,respectively.Sulphur fertilization increased crop yield by more than 5% in 15 trials over the 21 trials completed.Phosphogypsum obtained better response than single superphosphate,gypsum,and elemental sulphur.Crop response was found when the soil available sulphur content was about 30 mg kg -1 or more,which may be considered as a value to identify soil sulphur deficiency or potential deficency in Guizhou.There is one third of soil samples analysed below this level.In order to meet the high yield demands for sulphur by crops,it is recommended that 31 5 to 60 kg S/ha be applied in sulphur deficiency or potential deficiency soils in Guizhou province
出处
《西南农业学报》
CSCD
北大核心
1999年第3期57-63,共7页
Southwest China Journal of Agricultural Sciences
关键词
土壤
硫素状况
作物
硫肥效益
soil sulphur status
crop
response to sulphur fertilization
