论文部分内容阅读
对发育于13种母质共10个土类的1029个耕层和剖面土样进行分析.结果表明,安徽省土壤缺硫(有效硫<16mg/kg)以淮北和皖西最严重,频率高达48%和42%,其次是沿江地区.土类中以黄潮土最缺,频率高达60%,其次是灰潮土和紫色士,约占40～50%.潜在缺硫(有效硫16～30mg/kg)的土壤主要有红壤、砂姜黑土及水稻土,缺硫频率分别为37%、35%和32%.全省严重缺硫农田206×10~4hm~2,潜在缺硫农田253×10~4hm~2.本文还研究了有效硫在土壤剖面中的分布特征.
1029 tillage and profile soil samples of 10 soil types developed in 13 kinds of parent materials were analyzed.The results showed that the soil sulfur deficiency (effective sulfur <16mg / kg) in Anhui Province was the most serious in Huaibei and Wanxi and the frequency was as high as 48 %, And 42% respectively, followed by the Yangtze River region. Among the soil types, yellow soil is the most abundant with frequency up to 60%, followed by gray soil and purple soil, accounting for 40-50% ) Were mainly red soil, saprolium black soil and paddy soil, the frequency of sulfur deficiency was 37%, 35% and 32%, respectively.The serious sulfur-deficient farmland in the province was 206 × 10 ~ 4hm ~ 2 and the potential deficient farmland was 253 × 10 ~ 4hm ~ 2.This paper also studied the distribution of available sulfur in the soil profile.