Abstract: To explore the effects of different soil compaction on the growth and activity of peanut root,determine the required compaction suitable for the growth of peanut,provide a theoretical basis for the breeding and cultivation of new varieties of high-yielding peanut.Used Qinghua 7 which was high-yield peanut varieties as the material,a method using barrel planting set soil bulk density was 1.1,1.2,1.3,1.4,1.5 g/cm³ 5 treatments,studied the effects of soil compaction on the growth and activity of peanut root.The results showed that in peanut root development period,soil bulk density too large was not conducive to the expansion of root elongation and surface area,and with the growing process to promote the greater impact,soil bulk density too small,then the root length and surface area decline too fast,in peanut root recession period.The suitable soil bulk density (1.2 g/cm³) could not only guarantee the development of root elongation and expand root surface area,but also delay the root length and surface area of root decline.Soil bulk density too large or too small was not conducive to accumulation of the root dry matter weight, increasing of the root volume and root activity. With the increase of soil bulk density,the root diameter increased. So the bulk density within 1.2-1.3 g/cm³ range was conducive to peanut root growth and activity increase.

Key words: Peanut, Soil compaction, Soil bulk density, Root growth, Root activity

CLC Number: 

• S565.01