摘要
测定了陕西关中地区不同栽培年限日光温室土壤不同形态磷素的含量,以评价土壤磷素累积特性。结果表明:与农田土壤相比,日光温室栽培土壤全磷、有效磷、水溶性磷含量显著增加,土壤表层Olsen-P和水溶性磷平均含量分别达227 mg kg-1和8.45 mg kg-1;0～20 cm土层土壤全磷、Olsen-P和水溶性磷含量平均分别为农田的1.78倍,8.00倍和3.70倍,20～40 cm土层的分别为农田的0.62倍,3.24倍和2.53倍;且随日光温室栽培年限的增加,不同形态磷的累积量呈逐年递增的趋势。日光温室土壤全磷、有效磷、水溶性磷三者关系呈显著线性相关关系,有效磷与水溶性磷达极显著正相关。表明研究地区日光温室栽培下土壤磷素过量累积带来的淋溶风险值得关注。
To evaluate the accumul ation of phosphorus in soil under sunlight greenhouse cultivation, we had determined the different forms of P in the soils of Guanzhong Plain, Shaanxi Province. The results showed that the contents of total P, Olsen-P and H2O-P in greenhouse soils significantly were increased in compared with the arable land. The average of Olsen-P and HEO-P in 0 - 20 cm layer of greenhouse soils was 227 mg kg^-1 and 8.45 mg kg^-1, respectively. The contents of total P, Olsen-P and H2O-P in 0 - 20 cm layer of greenhouse soils was 1.78, 8.00 and 3.70 times of arable land, respectively; in the 20 - 40cm soil layer, the contents of total P, Olsen-P and H2O-P was 0.62, 3.24 and 2.53 times of arable land, respectively. The contents of the different forms of P increased as the greenhouse continued. There were significant positive correlation between soil TP, and Olsen-P, and HEO-P, and so does the relationship between Olsen-P and H2O-P. It indicates that more attention deserves to study the P loss due to the excessive P accumulation P in greenhouse soil.
出处
《土壤通报》
CAS
CSCD
北大核心
2012年第1期171-175,共5页
Chinese Journal of Soil Science
基金
陕西现代农业产业技术体系(蔬菜)和西北农林科技大学拔尖人才支持计划(2006)资助
