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本文研究了中国东北地区不同纬度梯度农田土壤Olsen-P在0～100cm剖面中的分布特征。结果表明,除公主岭和大石桥外,其他各点土壤Olsen-P含量在0～20cm土层较高,20～40cm土层迅速下降,40～100cm各土层又逐渐升高,但底层要远低于表层。不同纬度梯度下各点0～20cm土层Olsen-P含量为暗棕壤>黑土>棕壤,高纬度地点Olsen-P含量具有高于低纬度地点的趋势;20～100cm各土层Olsen-P含量总体表现为黑土和暗棕壤相对较高,棕壤区偏低,没有明显的纬度分异现象。施肥等农田管理措施对0～20cm土壤Olsen-P含量有明显影响,其他土层Olsen-P含量可能主要受磷素运移特点和成土母质等因素影响。
In this paper, the distribution characteristics of soil Olsen-P in 0-100 cm sections of farmland with different latitudes in Northeast China were studied. The results showed that in addition to Gongzhuling and Dashiqiao, the content of Olsen-P in other sites was higher in 0-20cm soil layer, the soil layer in 20-40cm decreased rapidly, the soil layer in 40-100cm was gradually increased, but the ground floor was far Below the surface. The Olsen-P content of 0-20 cm soil layer under different latitude gradients is dark brown soil> black soil> brown soil. The Olsen-P content of high latitudes tends to be higher than that of lower latitudes; Olsen-P The overall content of black soil and dark brown soil is relatively high, brown soil area is low, there is no obvious latitude differentiation phenomenon. Fertilization and other farmland management practices have a significant effect on Olsen-P content in 0 ~ 20cm soil. Olsen-P content in other soil layers may be mainly affected by factors such as phosphorus transport and parent materials.