不同修复措施对退化草地恢复效果的研究OACSTPCD

[Objective]This study was conducted to assess the effects of different remediation measures on the restoration of degraded grassland.[Method]A restoration trial with three measures,including enclosure(TW),enclosure+supplementary sowing(TB),and enclosure+supplementary sowing+fertilization(TBS),was performed on the moderately and severely degraded grasslands in Jarud Banner,Tongliao City,Inner Mongolia.Using the peripheral grazing plots as control(CK),the vegetation height,coverage and above-ground biomass of the degraded grasslands were continuously monitored and compared under different remediation measures from 2016 to 2019.[Result]During the whole monitoring period,the vegetation height,coverage and above-ground biomass of TW,TB and TBS treatments were all significantly(P<0.05)higher than those of CK.In the current year of restoration(2016),the vegetation height,coverage and above-ground biomass of TB and TBS treatments were significantly(P<0.05)higher than those of TW treatment,and the vegetation height and coverage of TBS treatment were significantly(P<0.05)higher than those of TB treatment.In 2017,the vegetation height and above-ground biomass of TBS treatment were significantly(P<0.05)higher than those of TW and TB treatments,and the vegetation coverage of TB and TBS treatments was significantly(P<0.05)higher than that of TW treatment.In 2018,the vegetation above-ground biomass of TB and TBS treatments was significantly(P<0.05)higher than that of TW treatment,and the vegetation above-ground biomass of TBS treatment was significantly(P<0.05)higher than that of TB treatment.In 2019,the vegetation coverage and above-ground biomass of TB and TBS treatments were significantly(P<0.05)higher than those of TW treatment.[Conclusion]The remediation measures of enclosure,enclosure +supplementary sowing,and enclosure +supplementary sowing +fertilization all had good restoration effects on moderately and severely degraded grasslands,with enclosure+supplementary sowing+fertilization having the best restoration effect.