作 者 ：胡正义1;竺伟民2;曹志洪1
期 刊 ：植物营养与肥料学报 1999年 5卷 3期 页码：273-281
Keywords:Soil, Organic sulphur, Rape-rice rotation system, Effect,
摘 要 ：江淮丘陵地区下蜀黄土母质发育的水稻土油 稻轮作试验表明：油菜收获后土壤比试验前土壤总有机硫及碳键硫、硫酸酯和惰性硫组分含量分别下降了51.3% 、60.2% 、29.3%和73.4%；水稻收获后土壤比油菜收获后土壤总有机硫及碳键硫、硫酸酯和惰性硫组分含量分别增加了129% 、302% 、78%和203% 。与试验前土壤比较，油菜收获后土壤有机硫、碳键硫和惰性硫占总硫百分数分别下降了12.6、3.2和18.7个百分点，碳键硫和惰性硫占总有机硫百分数分别下降了2.3和18.7个百分点；而硫酸酯形态硫占总硫和有机硫百分数则分别增加了8.9和20.7百分点。与油菜收获后土壤比较，水稻收获后土壤总有机硫、碳键硫和惰性硫占总硫百分数分别增加了7.4 、6.9和7.7个百分点，碳键硫和惰性硫占总有机硫百分数分别增加了7.7和7.2个百分点；而硫酸酯形态硫占总硫和总有机硫百分数则分别减少了21.2和14.9个百分点。与同期不种作物处理相比，油菜收获后和油 稻轮作后土壤硫酸酯形态硫含量、占总硫及占有机硫百分数分别增加12.4个百分点和64.1个百分点，7.2和14.5个百分点及10.8和17.9个百分点而土壤惰性硫占总硫百分数下降9.6和13.6个百分点，占有机硫百分数则增加12.8和18.6个百分点。虽然油菜种植导致耕层土壤有机硫有显著下降，而其在水稻种植期间被逆转。因此，油-稻轮作制度是维持该地区土壤硫肥力的一种较好耕作措施之一。
Abstract:The results of rape rice rotations field trails conducted in hills region between Yangtze and Huaihe Rivers indicated that content of total organic sulphur, and C-S, C-O-S and inert S in soils sampled after harvesting rape decreased by 51.3%, 60.2%, 29.3%, and 73.4% respectively compared with soils sampled before trail; content of total organic sulphur, and C-S, C-O-S and inert-S in soils sampled after harvesting rice increased by 129%, 302%, 78% and 203% respectively compared with soils sampled after harvesting rape. Compared with soils sampled before trails, percent of total organic sulphur, C-S, C-O-S and inert-S in total sulphur in soils sampled after harvesting rape decreased by 12.6, 3.2 and 18.7 respectively; percent of C-S and inert-S in total organic sulphur in soils decreased by 2.3 and 18.7 respectively ; however percent of C-O-S in total sulphur and organic sulphur in soils increased by 8.9 and 20.7 respectively Compared with soils sampled after harvesting rape, percent of total organic sulphur, C-S and inert-S in total sulphur in soils sampled after harvesting rice increased by 7.4, 6.9 and 7.7; percent of C-S and inert-S in total organic sulphur in soils increased by 7 7 and 7 2 respectively; however percent of C-O-S in total sulphur and organic sulphur in soils decreased by 21.2 and 14.9 respectively Compared with soils sampled CK treatment in corresponding period,content of C-O-S, percent of C-O-S in total sulphur and total organic sulphur in soils sampled after harvesting rape and rape-rice rotations increased by 12.4% and 64.1%, 7.2 and 14.5, and 10.8 and 17.9 respectively; however percent of inert-S in total sulphur in soils decreased by 9.6 and 13.6, and percent of inert-S in total organic sulphur increased by 12.8 and 18.6 The organic sulphur in top layer soil during rape planting decreased significantly, and that during rice planting on the opposite side This showed that rape-rice rotation systems was one of better cropping systems for maintaining soil sulphur fertility in the area
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