施肥和镇压对免耕补播草地群落特征及多样性的影响

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中图分类号：S812 文献标识码：A 文章编号：1007-0435（2026）01-0287-14

Abstract：No-tillreseeding is one of the important measures for restoring degraded grassand，and whether the replanted grass species can growand settle in the native vegetation community is the key to the succesof no-til reseeding in degraded grassand.In order to clarify the effcts of fertilization and compaction measures on the growth of no-tillage reseeding grasss，grass community characteristics and biodiversity，three no-tillage reseeding modes，five fertilizer combinations and two compaction treatments were set up in this study. The results showed that，compared with the control treatment，the nitrogen and phosphorus treatments had a signifi cant effct on thecharacteristics of grasscommunities in the three replanting modes，in which theheightof grass communities increased by 23.91%-43.43% ，the cover increased by 7.07%-15.21% ，and the density and biomass increased by 15.74%-51.94% and 17.57%-36.78% ，respectively，but there was no significant effect on the diversity of grass communitie.Compared to the single-species supplemented grassland of alfalfa and awnless sparow.The vegetation cover and densityof the simultaneously supplemented grassand of alfalfa and awnless sparrow significantly increased by 3.01%-3.89% ， 6.45%-15.90% ，and the diversity indices of grassland， such as Simpson's index ofdominance，Shannon-Wiener's index，and Pielou’s index of evenness，increased by 3.65%-9.70% ， 5.02%-9.38% and 2.89%-8.97% . The average plant height，cover，density and biomass of the grass community compaction after no-till reseeding increased by 6.44% ， 0.76% ， 3.07% and 11.37% ， respectively，compared with that of the no-suppression treatment. Considering all the factors，the measures of replanting alfalfa and awnles triticale in degraded grassland，adding nitrogen and phosphorus nutrients，and sup pressing treatment can improve the productivity and restore the ecological function of the grassland.

Key words：No-tillreplant;Fertiliser;Suppression; Community characteristics;Biodiversity

新疆作为我国重要牧区之一，天然草地面积 ，占全国可利用草地面积的14.5%[1-2] 。（剩余26473字）