【摘要】 分析了由黄土性古河流冲积物、近代黄泛沉积物、下蜀黄土等 3种成土母质发育的黄褐土、潮土、砂姜黑土、水稻土等 4个土类共 44个土样的有效S含量 ,并结合土地利用方式和施肥 ,研究了土壤有效S的丰缺及输入与输出状况 ,预测了对S的需求 .结果表明 ,土壤有效S含量高低顺序为水稻土 >砂姜黑土 >黄褐土 >潮土 ,不同土地利用方式为水田 >旱地 .土壤有效S缺乏频率 ,按成土母质排序是黄土性古河流冲积物 >下蜀黄土 >近代黄泛沉积物 ,潜在缺S频率高低依次是黄土性古河流冲积物 >近代黄泛沉积物 >下蜀黄土 ;从土壤类型看 ,是砂姜黑土 >黄褐土 >潮土 >水稻土 ,潜在缺S是水稻土 >潮土 >砂姜黑土 >黄褐土 .土壤有效S缺乏面积 ,以砂姜黑土最大 ,达 7.0× 10 4 hm2 ;其次是黄褐土 ,为 2 .0× 10 4 hm2 ;潮土为 6 0 0 0hm2 ;总缺S面积为 9.6×10 4 hm2 ,占耕地总面积 2 5 .0 6 % ;潜在缺S面积 1.6× 10 5hm2 ,占耕地总面积 42 .0 4% .按目前的土壤有效S含量水平和作物高产对S的需求 ,蚌埠三县一郊 3 .8× 10 5hm2 的耕地 ,近期需S量为 3 .0× 10 6kg左右 ,远期需S量为 1.2× 10 6kg左右 .更多还原

【Abstract】 This paper investigated the available S contents of yellow cinnamon soil,fluvisol,shajiang black soil and paddy soil,which were developed from loessial ancient-river alluyium,recent loess-flooding deposit,and Xiashu loess.The input and output,and the abundance and deficiency of soil available S were studied in combination with the mode of land utilization and fertilization,and the soil demands of S was predicted.The results showed that the content of soil available S was decreased in the order of paddy soil>shajiang black soil>yellow cinnamon soil>fluvisol,and there was more S in irrigated land than in dry field in case of different land utilization.From the viewpoint of parent material,the deficiency frequency of soil available S was in the order of loessial ancient-river alluvium>Xiashu loess>recent loess-flooding deposit,and the potential deficiency frequency of S was loessial ancient-river alluvium>recent loess-flooding>Xiashu loess.As for soil type,the deficiency frequency of soil available S was in the order of deposit shajiang black soil>yellow cinnamon soil>fluvisol>paddy soil,and the potential deficiency frequency of S was paddy soil>fluvisol>shajiang black soil>yellow cinnamon soil.Shajiang black soil had the largest area of lacking available S,which amounted to 7.0×10 4hm 2,yellow cinnamon soil had an area of 2.0×10 4hm 2,and fluvisol was 6000hm 2.The total area of lacking S was 9.6×10 4hm 2,accounted for 25.06% of total cultivated area.The total area of potentially lacking S was 1.6×10 5hm 2,accounted for 42.04% of the total.According to the current available S content in soils and the S demands for high yielding crops,the S demands of 3.8×10 5hm 2 farmland in three counties and one district of Bengbu was about 3.0 ×10 6kg and 1.2×10 6kg in the recent and far future,respectively.更多还原