【摘要】：為了研究生態(tài)恢復(fù)措施對(duì)草原土壤性狀和土壤質(zhì)量的影響,2016年在寧夏黃土高原丘陵區(qū)典型草原,以放牧草地(FM)為對(duì)照,研究了封育(FY)、水平溝(SP)和魚鱗坑(YL)3種恢復(fù)措施對(duì)0~40 cm土壤理化性質(zhì)和生物學(xué)特性的影響,評(píng)價(jià)了各措施下的土壤質(zhì)量。結(jié)果表明:1)FM土壤容重最高,土壤黏粒含量、田間持水量和總孔隙度較低;FY、SP和YL措施間土壤物理性質(zhì)差異不顯著(P0.05)。2)土壤有機(jī)質(zhì)、全氮和速效氮以FY最高,SP和YL較低;全磷與速效鉀含量以FM最高,SP最低。3)土壤蔗糖酶和脲酶活性呈FYSPYLFM;蛋白酶和磷酸酶呈FY草地最高,YL最低;細(xì)菌、放線菌和真菌在各處理間變化各異,微生物總量呈FYFM≈SPYL,但微生物生物量碳、氮呈FYYL≈SPFM(P0.05);土壤因子間存在一定的相關(guān)性。4)隸屬函數(shù)結(jié)合因子分析法評(píng)價(jià)的土壤質(zhì)量綜合得分為FYSPFMYL。因此封育是最有利于研究區(qū)退化草地土壤質(zhì)量恢復(fù)的措施,研究結(jié)果可以為寧夏典型草原生態(tài)建設(shè)提供理論基礎(chǔ)。
[Abstract]:In order to study the effects of ecological restoration measures on soil properties and soil quality of grassland, the (FM) of grazing grassland in Ningxia Loess Plateau hilly region in 2016 was used as control. The effects of (SP) and (YL) on the physical and chemical properties and biological characteristics of 0 ~ 40cm soil were studied, and the soil quality was evaluated. The results showed that there was no significant difference in soil physical properties between FYSSP and YL with the highest soil bulk density, soil clay content, field water holding capacity and total porosity (P0.05), but the highest total nitrogen and available nitrogen were the highest in FY SP and YL. The contents of total phosphorus and available potassium were FM highest and SP lowest. 3) the activities of soil invertase and urease were FYSPYLFM.The protease and phosphatase were the highest and the lowest in FY grassland. The changes of bacteria, actinomycetes and fungi were different among different treatments. The total amount of microorganism was FYFM 鈮，

本文編號(hào)：2150645