乡土草种组合补播对阿勒泰退化割草地生产性能及土壤养分的影响OA

To identify native grasses that can be used for restoring degraded mowing grasslands in the Altay Region of Xinjiang,this study conducted a two-year restoration experiment using three leguminous and four gramineous grass species in various combinations.The restoration effects were comprehensively evaluated by analyzing the impacts of different species combinations on grassland community structure,functional group composition,forage nutritional quality,and soil nutrients.The following results were observed:1)Reseeding of the grass-seed combination significantly optimized the plant community structure(P<0.05).The proportion of fine grasses increased from 28％to 58.4％,and the crude protein content of grasses increased by 56.67％.The soil fertility was also enhanced further.In the 0-10 cm soil layer,the contents of soil organic matter,alkali-hydrolyzable nitrogen,and available potassium were significantly higher than those of the control(P<0.05),and the highest increases were 263.59％,92.59％,and 133.69％,respectively.2)Comprehensive evaluation indicated that the combination of Medicago sativa'Xinmu No.4'(10％),Trifolium pratense'Minshan'(10％),Dactylis glomerata(10％),Poa pratensis(10％),Bromus inermis'Wusu No.1'(50％),and Elymus dahuricus(10％)is suitable for the ecological restoration of degraded natural mowing grasslands in the Altay Region of Xinjiang.This combination will provide reliable technical support and act as a viable species mixture for grassland restoration in similar areas.