Effect Of Different Sowing Rates And Mowing On Artificial Turf Of Elymus Sibiricus And Elymus Nutans In Different Planting Ways

With the special natural conditions of Sunan county, this experiment has studiedthe phonological phase, height, overwintering rate, above-ground biomass, AGR,dry-fresh ratio, leaf-stem ratio, fresh yield, regeneration rate, regeneration density,content of crude protein, acid dry fiber and neutral dry fiber of Elymus nutans andElymus sibiricus. The results are shown below.(1) Sowing method has the significant effect on growth performance of Elymusnutans and Elymus sibiricus. The seeding date and recovering date of the mentionedpastures are earlier by broadcast sowing than sowing in line. But from the perspectiveof whole growth period, the difference is not significant. Seeding rate has not thesignificant effect on the growth stage of Elymus nutans and Elymus sibiricus.(2) The height growth of Elymus nutans and Elymus sibiricus are mainly in thepreliminary and middle stage of life history. In the preliminary stage of life story, theheight of Elymus nutans and Elymus sibiricus by broadcast sowing are higher thansowing in line. On the contrary, the height became more higher by sowing in lineduring the middle stage. Seeding rate has not the significant effect on the height. Latergrowth stage, the height was reached74cm and79cm of two kinds forage.(3) Seeding method and seeding rate has slightly effect on the overwinteringrate. On the natural condition, the overwintering rate of Elymus nutans and Elymussibiricus are both higher than85%which show Elymus nutans and Elymus sibiricuscould overwinter safely in Sunan county.(4) Sowing method and sowing rate have different effect on fresh quality, hayquality, AGR, RGR of the2years old Elymus nutans and Elymus sibiricus on thedifferent growth stage. The above ground biomass of Elymus nutans and Elymussibiricus are the most from flowering stage to postulation stage, reached the8644kg/hm2(fresh),2473kg/hm2(dry) and10336kg/hm2(fresh),3614kg/hm2(dry),andshow a decrease trend after the period. The peak of AGR and RGR of above groundbiomass of Elymus nutans and Elymus sibiricus appear during the period from earing time to flowering time.(5) The fresh leaf-stem ratio and hay leaf-stem ratio of Elymus nutans andElymus sibiricus by broadcast sowing are higher than by sowing in line before16thJul. After that, the The fresh leaf-stem ratio and hay leaf-stem ratio of Elymus nutansand Elymus sibiricus by sowing in line are higher than by broadcast sowing. The freshleaf-stem ratio and hay leaf-stem ratio of the No.1sowing rate are the most before16th Jul. After that, The fresh leaf-stem ratio and hay leaf-stem ratio of the No.3sowing rate are higher than the others, They reached2.82(fresh),3.89(dry) and2.62(fresh),3.62(dry).(6) Sowing method and sowing rate has no significant effect on the content ofnutritional ingredient. During the second year, the content of crude protein show agradually decrease trend and dropped8.34%(TD2) and7.22%(TD2).The content offiber show a increase trend in the whole growth period.(7) The root of Elymus nutans and Elymus sibiricus are mainly in the uppersoil layer of0~30cm and the root weight of them is quite low. Root shoot ratio ofElymus nutans is relatively higher than Elymus sibiricus. Overall, sowing method hasno significant effect on the root of Elymus nutans and Elymus sibiricus.(8) Sowing method, sowing rate and mowing height and interaction havesignificant effect on the regeneration ability, yield and nutrition value. With the samesowing rate and mowing height, the regeneration speed, regeneration intensity totalyield and protein yield of Elymus nutans and Elymus sibiricus by sowing in line is thebest. With the same sowing rate, the best mowing height is6cm. With the samemowing height, the growth performance of the No.2sowing rate（45.0kg/hm2）is thebest.(9) Sowing method, sowing rate and mowing rate and interaction havesignificant effect on the regeneration ability, yield and nutrition value. With the samesowing rate and mowing rate, the growth performance of Elymus nutans and Elymussibiricus by sowing in line is the best. With the same sowing rate, mowing rate shouldbe controlled at the2times. With the same sowing method and mowing rate, thegrowth performance of Elymus nutans and Elymus sibiricus is the best at the No.2 sowing rate（45.0kg/hm2）.