不同土地利用方式对风沙土酶活性的影响  

Effects of Different Land Use Patterns on Enzyme Activity of Aeolian Sandy Soil

作　　者：黄静[1] 吴祥云[2] 单宝奇[1] 王美婷[1] 

机构地区：[1]辽宁工程技术大学理学院,辽宁阜新123000 [2]辽宁工程技术大学环境科学与工程学院,辽宁阜新123000

出　　处：《干旱区研究》2015年第2期221-228,共8页Arid Zone Research

基　　金：水体污染控制与治理科技重大专项课题(2012ZX0720202008-001)

摘　　要：以辽宁省彰武县柳河流域忙海林子村为例,研究了不同土地利用方式对该区域风沙土6种酶活性的影响。结果表明:裸地由于几乎无植被覆盖,各类生物少,酶活性普遍处于最低水平,应采取措施改良;河滩地由于其特殊的地理位置,土壤易被河水冲刷,酶活性普遍处于较低水平,且由于耕种会影响泄洪,因此,河滩地不适合开垦为耕地;非河滩耕地酶活性基本处于中等水平,说明由于耕作、收割等,加剧了水土流失过程,降低了酶活性,可适度休耕;天然草地酶活性基本处于较高水平,说明天然草地可在一定程度上改善风沙土酶活性;林地酶活性普遍处于最高水平,说明种植杨树对改善风沙土酶活性效果最为明显。Taking Manghailinzi village of Liuhe basin in the Zhangwu county,Liaoning Province as an example,the effects of different land use patterns on the six kinds of enzyme activities of aeolian sandy soil of the area were studied. The results showed that enzyme activity was at the lowest level because of sparse vegetation and few creatures in bare land. Enzyme activity of flood land was also at the lowest level because of the special geographical location of flood land where the soil was easily washed by river water. The flood land is not suitable for reclamation of cultivated land because farming would affect the releasing of flood water. Enzyme activity of farmland in non-flood land was in the middle level because cultivation and harvesting exacerbated soil erosion process and reduced the enzyme activity. The land was suggested to lie fallow. Enzyme activity of natural grassland was at the higher level,which illustrated natural grassland can improve the aeolian sandy soil enzyme activity to a certain extent. Due to soil surface litter and humus accumulation,adequate nutrition and better hydrothermal conditions,the enzyme activity in forest land was at the highest level. Therefore,the effect of improving sandy soil enzyme activity was the most obvious through planting poplar.

关 键 词：土地利用 风沙土 土壤酶活性 辽宁 

分 类 号：S154.2[农业科学—土壤学]