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硫是作物生长发育所需的营养元素。根据多年多点田间试验和土壤有效硫测定,研究福建主要粮经作物的硫肥效应、土壤有效硫临界指标和耕地土壤硫肥力状况。64个田间试验表明,福建主要农作物施用硫肥平均增产10.5%,增产幅度是旱作物>水稻>香蕉;水田土壤和旱地土壤有效硫临界指标分别为23mgkg-1和25mgkg-1。根据全省372个耕层土样有效硫测定结果,土壤有效硫含量平均为27.6mgkg-1,低于土壤有效硫临界值的样品数占57.0%,其中,闽东南地区耕地土壤有效硫缺乏程度比闽西北地区高;在土地不同利用类型中,旱地土壤有效硫总体比水田匮乏,旱地土壤有效硫平均含量是茶果园>菜园>农地,其中,农地土壤有效硫低于临界指标的样品占75.3%;水田中不同土种的土壤有效硫含量以埭田最高,灰沙泥田为最低,旱地则以灰赤土最高而风沙土最低。
Sulfur is a nutrient required for crop growth and development. According to the multi-year field experiment and soil available sulfur determination, the sulfur fertilizer effect, the critical sulfur index of soil available sulfur and the soil sulfur fertility of cultivated land were studied. Sixty-four field trials showed that sulfur fertilizer application increased by 10.5% on average for main crops in Fujian Province, and the increase rate was dry crop> rice> banana. The critical sulfur index of paddy soils and dry land was 23mgkg-1 and 25mgkg-1, respectively. According to the results of available sulfur measurements of 372 tillage soil samples in the province, the average soil available sulfur content was 27.6 mg kg-1, and the number of samples below the soil available sulfur threshold value was 57.0%. Among them, the available soil sulfur deficiency in cultivated land in southeastern Fujian Which is higher than that in Northwest Fujian Province. Among the different types of land use, the available sulfur in dry land is less than that in paddy field, and the average content of available sulfur in dry land is tea orchard> vegetable garden> farmland. Among them, the available sulfur in farmland is lower than the critical index Accounting for 75.3%; paddy fields of different soil types of soil available sulfur content in the highest field, gray sand muddy field is the lowest dryland is highest in gray-gray soil and the lowest wind-blown soil.