Evaluation And Screening Of Suitable Native Grass Species And Mixing Effect In Vegetation Restoration In Horqin Sandy Land

The Horqin Sandy Land has been an endless grassland.It has been one of the four major sands in China due to years of farming,improper use of people,overgrazing,and climate.In June 2018,Inner Mongolia,Inner Mongolia,Alu Kerqin Banner,Bayar Grass Industry Co.,Ltd.,with Horqin Sandy Land as the research object,and using native grass species as research materials,the native grass suitable for vegetation restoration in Horqin Sandy Land.The species and mixed combination were evaluated and screened.The results obtained in screening good pastures are as follows:(1)The results of 16 forage materials tested were good in the year,the height of grass layer generally reached 13?43 cm,the absolute height reached 13?55 cm;the biomass(dry matter)ranged from 4.28?126.32 g/m2.between.The growth rate of grasses in the seedling stage is faster than that of legumes.From mid-July,the long-term speed of leguminous grasses gradually exceeds that of grasses.(2)In the restoration of degraded grassland in sandy meadows,the excellent forages that are urgently needed are short emergence time,fast growth at seedling stage and high biomass.Among the tested pastures,the seedlings of Mengnong hybrids were shorter,and the growth rate of the plants after emergence was faster.Among the legumes,the emergence time of Shaxingwang was shorter,but the growth rate of seedlings was slower.The growth rate is relatively fast,the absolute height and natural height of the plant are higher than other pastures,and the biomass is also higher.Mongolian grass has a shorter emergence time in grasses,and the growth rate is slower in seedling stage.The growth rate after planting is faster and the biomass is higher.Therefore,these three kinds of pastures are used as the preferred grass species in the restoration and reconstruction of degraded grassland in Horqin Sandy Land.In addition,Zhongmu No.3 and Laomengmai also performed well in the restoration of sandy vegetation.The results obtained in screening the mixed mix are as follows:(1)Under the conditions of seed dressing and mixed planting,the plant heights of Sha Dawang and Prairie No.3 in the mixed sowing treatment were lower than those in unicast treatment;in the flat ear ice grass and grassland No.3 at 5:5?6:4?4:6 The mixed planting and the plant height of B.serrata in the treatment of 5:5 sand stalks were higher than that of unicast treatment.Under the condition of intermixing,the plant heights of B.serrata,Sha Dawang and Prairie No.3 were lower than those of unicast.(2)Flat ear ice grass 4:6 sand beat Wang,flat ear ice grass 4:6 grassland No.3,flat ear ice grass 1+1 sand beat Wang and flat ear ice grass 1+1 grassland No.3 mixed broadcast treatment The indicators in the study are better,and all of them have achieved the effect of increasing yield,and have great potential application in the restoration of artificial grassland vegetation.