摘要
黄土丘陵区草地土壤主要类型有黑垆土和黄绵土。草地土壤有效微量元素含量,锌、铜、铁、锰、钼分别变化在0.07～0.61ppm、0.30～1.07m、2.68～5.28ppm、1.99～9.59ppm和0.012～0.049ppm。一般是黑垆土高于黄绵土,表层大于其他层次。在剖面分布上锌、锰、铜黑垆土呈“凸型”,而锌、锰黄绵土符合幂回归方程y=AX^(-b)。锌、铜、锰和钼的有效含量一般在临界值以下。黄土丘陵区草地土壤有效磷也甚缺乏,在施用微肥时应配合磷肥,以便发挥最佳效益。
The content of available trace element Zn, Cu, Fc, Mn and Mo in the grassland soil of loess hilly regions on the Loess Plateau varies within the range of 0.07-0.61ppm, 0.30-1.70ppm, 2.68-5.28ppm, 1.99-9.59ppm and 0.012-0.049ppm, respectively. Generally speaking, the trace element content in Heilu soil is higher than that in Huangmian soil and the content in content in topesil is hiqher than that of the deeper soil layers. For Heilu soil, the variation in the content of Zn, Mn and Cu with soil depth can be expressed by a convex function while for Zn and Mn in Huangmian soil the relationship can be expressed by a regression function as Y=AX^(-b). Because the content of available Zn, Cu, Mn and Mo is usually below the critical level of deficiency and the grassland soil in loess regions also has a lack of available P, the trace elements should be dressed to the soil with adequate application of P so as to increase the effect of these micronutrients.
出处
《草业科学》
CAS
CSCD
北大核心
1990年第1期35-38,共4页
Pratacultural Science
