Effects of stumping modes on configuration of fine root and nutrients in soil of Caragana korshinskii
The 17-year-old forest of Caragana korshinskii in Damao Banner,Baotou City,Inner Mongolia was used to study the rule of changes in the configuration of fine root and the nutrients in soil of Caragana korshinskii under different stumping modes.The changes in the configuration of fine root and the nutrients in soil of artificial forests of Caragana korshinskii under treatments of stumping with 0 cm,10 cm,and 20 cm and non-stumping(CK).The results showed that the content of soil organic matter(SOM),available nitrogen(AN),available phosphorus(AP),and available potassium(AK)in soil was the high-est in the mode of stumping with 10 cm.The fine roots under different stumping modes had a typical fish-tail-shaped branching structure,and the mode of stumping with 10 cm effectively improved the root branch-ing structure and enhanced the growth of secondary branches.The total root length,specific root length,tissue density,and the content of dry matter in fine roots of Caragana korshinskii all were the best under the mode of stumping with 10 cm.The results of comprehensive analysis of membership function showed that the decreasing order was stumping with 10 cm(0.58)>stumping with 0 cm(0.46)>stumping with 20 cm(0.44)>no stubble(0.42).It is indicated that the mode of stumping with 10 cm has the best effect on the regeneration and rejuvenation of Caragana korshinskii,which is conducive to promoting the conser-vation of soil and water and the sustainable development of the ecological environment in ecologically frag-ile areas.
Caragana korshinskiistumpingconfiguration of fine roottopological structure
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