Effect of Planting Juncao on Nutrients, Enzyme Activities and Microorganisms of Desertified Soils

LIN Dongmei; LIN Zhanxi; SU Dewei; ZHENG Dan; LIN Hui; LIN Xingsheng; LI Jing; MEI Lan

doi:10.15933/j.cnki.1004-3268.2017.05.011

Abstract：To improve the desertified soils at the eastern edge of Ulanbuh desert,the effects of planting Pennisetum sp.and Arundo sp.on the nutrient content,enzyme activities and microbes of soil were studied.The results showed that planting Pennisetum sp.and Arundo sp.could significantly increase the contents of organic matter,available phosphorus,available potassium,total nitrogen,total phosphorus in soil,with the increase rate of 93.15％,30.91％,51.12％,75.38％,8.11％％ for planting Pennisetum sp.and 245.21％,36.97％,23.97％,73.38％,10.81％ for planting Arundo sp.respectively.Planting Pennisetum sp.and Arundo sp.could significantly increase the activities of catalase,sucrase,urease (except Arundo sp.),acid phosphatase in soil,with the increase rate of 25.00％,39.18％,508.69％,718.18％ for planting Pennisetum sp.and 13.46％,2.24％,43.14％,109.09％ for planting Arundo sp.respectively,the effect of planting Pennisetum sp.was much better than Arundo sp.Planting Pennisetum sp.and Arundo sp.could significantly increase the quantity of bacteria,fungi,actinomycetes,microorganisms in soil,with the increase rate of 2 715.75％,20.66％,94.24％,2 139.08％ for planting Pennisetum sp.and 2 054.72％,57.02％,66.51％,1 616.92％ for planting Arundo sp.respectively,the quantity of microorganisms in total increased more for planting Pennisetum sp..After planting Pennisetum sp.and Arundo sp.the proportion of bacteria accounting for the soil microorganism significantly increased by 25.76％ and 25.50％ respectively,while the proportion of fungi and actinomycetes accounting for the soil microorganism decreased by 94.62％,91.12％ and 91.39％,90.38％ respectively.In conclusion,planting Juncao had certain improvement for soil,and Pennisetum sp.had the better improvement effect.