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观测了新疆策勒绿洲-沙漠过渡带不同覆盖度骆驼刺(Alhagi sparsifolia)群落在生长季的地表蚀积特征。结果表明:骆驼刺群落从生长初期到稳定期,密度为0.2株·m-2的群落植被覆盖度由3.09%增长到34.42%,密度为0.18株·m-2的群落植被覆盖度由3.18%增长到22.66%,前者的阻沙效果优于后者,两者在生长初期地表风蚀最为严重,之后各阶段以风积为主,且单位面积净蚀积量随时间的推移逐步增加后趋于稳定;裸沙地以风蚀为主;密度为0.1株·m-2的群落植被覆盖度由0.44%增长到20.30%,与裸沙地相比,局部风蚀现象更为严重,且单位面积风蚀量随时间的推移而增加;植被覆盖度较大的群落内部和植株背风区,风积现象明显,群落外围迎风侧和植被覆盖度较小的区域,风蚀较为严重。应重点加强骆驼刺皆伐后生长初期和植被覆盖度较低区域的地表防护作用。
The surface erosion characteristics of Alhagi sparsifolia communities in the Cele oasis-desert transitional zone of Xinjiang during the growing season were observed. The results showed that the vegetation coverage of the community increased from 3.09% to 34.42% at the density of 0.2 plant · m-2 and the vegetation coverage at the density of 0.18 plant · m-2 increased from 3.18% To 22.66%. The former is better than the latter in terms of sand resistance. Both of them have the most serious surface wind erosion at the early stage of growth. Afterwards, the wind erosion is dominant in each stage, and the net erosion volume per unit area gradually increases after the passage of time The wind erosion was dominant in the bare sandy land. The vegetation coverage of the community with the density of 0.1 plant was increased from 0.44% to 20.30%. Compared with the bare sandy land, the local wind erosion was more serious and the wind erosion per unit area With the passage of time increased; vegetation coverage within the community and the leeward area of the plant, the phenomenon of aeolian obvious, the windward side of the community and the smaller vegetation coverage, wind erosion is more serious. Should focus on strengthening the camel thorn clear-cut after the initial growth and vegetation coverage in the lower areas of the surface protective effect.