集约农区耕层土壤养分相关性变化研究

Study on Correlativity Change of Surface Soil Nutrients in Intensified Agricultural Regions

农田的高产稳产需要充足、协调的土壤养分,通过田间采样分析并与第二次土壤普查资料比较,研究了山东省聊城市土壤养分间的相关性。结果表明,研究区土壤养分含量有了较大幅度的提高,其空间差异性减弱,均匀化增强;土壤养分含量间相关性减弱,协调性降低。其原因主要在于对化肥的依赖性,并提出了相应的建议。

It is important to maintain adequate and harmonious soil nutrients for high and steady output of fields. Using the surface soil samples taken from the high - yielding fields and compared with the Second Soil General Survey, the correlations of soil nutrients were studied in Liaocheng City, Shandong Province. After 20 - year cultivation and fertilization, the surface soil nutrients contents increased obviously, the spatial variability weakened, and the correlativity and balance declined. The changes were mainly due to the increased dependence on chemical fertilizers. Then the countermeasures were also put forward at last.