Abstract: In order to determine the existence of growth redundancy in peanut growth process,explore the optimum length of high yield of peanut.With high-yield peanut varieties-Qinghua 7 as the material,set 4 kinds of size space,length× width×deep was 40 cm×20 cm×20 cm,40 cm×20 cm×40 cm,40 cm×20 cm×60 cm,40 cm×20 cm×80 cm,respectively.Using the method of mesh bag,studied the root growth space effect on growth and yield of peanut.The result showed that with the increase of soil root-growing space,the plant height,branching number and the dry weight of the roots and leaves increased gradually,the difference was more significant with the advancement of growth process.The smaller soil root-growing space significantly influenced flowers,needles and pods of peanut in each period;the larger soil root-growing space reduced the number of flowers,needles and pods in the early-middle period,and increased the numbers in the middle-late period;the moderate soil root-growing space (limiting the depth of root 60 cm) had an opposite tendency to the larger soil root-growing space.The smaller soil root-growing space leaded to the lack of growth,and the larger soil root-growing space leaded to the redundancy growth,which hindered the production.Moderate soil root-growing space was a guarantee of enough growth,less redundant growth,and improved the pod yield and seed yield.That's provided atheoretical basis for breeding and cultivation of high-yielding.

Key words: Peanut, Soil root-growing space, Growth and development, Yield, Redundancy growth

CLC Number: 

• S565.01