Effects of Different Afforestation Techniques on Soil Nutrients in Populus alba Woodland

摘要

cqvip:[Objective] The research aimed to study the influence of different afforestation technology measures on soil nutrients of P. alba woodland in arid valley region of Rikaze,Tibet. It aimed to improve afforestation technology measure in arid valley region of Rikaze,Tibet,and provide theoretic basis for restoring the degraded ecosystem at upper reaches of the Yarlung Zangbo River. [Method] In arid valley region of Duojiao Village,Nanmulin County,Rikaze City,the planted land using rooting powder,egg shell,leaves,mud and water retention agent was taken as research object,while the land without any afforestation measures was taken as the control,to determine soil nutrients under different afforestation measures.[Result]Under different afforestation measures,the contents of various soil nutrients were all obviously higher than control,in which available potassium,available phosphorus,alkali hydrolysable nitrogen and organic matter in soil obviously increased than control,but there was no similar rule among different measures. [Conclusion]Vegetation restoration in dry valley belt of Rikaze by different afforestation measures is favorable for improving physical-chemical properties of soil and increasing soil fertility.