The Effect Of Different Mowing Systems On Alfalfa Mixed Artificial Grassland

Planting of 1991, the year in 2001-2008 by different cutting system (cut-off year for two years, cutting a year once, cut twice a year, cutting a year off a year) treated alfalfa mixed artificial grassland community characteristics of the studies and explore cutting system on the impact of artificial turf. With a view to comparison of different systems to evaluate the mowing for the artificial turf of the study and utilization of grassland productivity and improving to provide a scientific basis.The main conclusions are as follows:1. After mowing significant changes in soil physical and chemical properties, cut two years off of one year cut twice a year cut off for one year, a year cut the soil bulk density were 11.76% lower than that of the control, 23.20%, 21.26%, 11.39 %, and cut twice a year and cut off one year after the year of soil bulk density was significantly lower than a year cut off for two years and cut once a year, respectively, compared with the control of soil moisture to increase soil moisture content 83.56%, 91.27%, 89.65 %, 88.36%, four between mowing the difference was not significant.2. Cut once a year, control, cutting off one year, the cut-off year for two years of biomass were significantly higher than the cut twice a year, second year, the fifth highest biomass contrast, the seventh year of a last year cut the maximum biomass, and significantly higher than other measures of different cutting, cutting off one year and two years cut off quite a year of biomass. Cut twice a year after the biomass was significantly lower than the other three cutting system.3. After cutting through, L1 layer of soil total N content was significantly higher than the control; and cut off one year was significantly higher than the other three cutting system, cutting twice a year, cutting off a year for two years, cut once a year no significant difference between. After mowing L2 layer of soil total nitrogen content is higher than the control, and reached a significant level, cutting off one year was significantly higher than the other three cutting system. Total nitrogen in the soil there was a clear trend to reduce the vertical distribution, with the deeper soil layers, soil total nitrogen content decreased.4. Different cutting systems in soil organic matter content changes in the general trend is: in the horizontal cut a year> cut twice a year> cut-off year for two years> cut-off year for one year; in the vertical, the soil organic matter content with the depth increases. Different cutting system along with the soil nutrients of the soil depth increases.L1 layer of soil for the full price of nutrient content was significantly higher than the control, while the total level of increase is higher than the increase rate of total phosphorus. Cut a one-year total nitrogen, total phosphorus content was significantly higher than a year cut off twice a year for two years and cut. Mowing the L2 layer of soil nutrients affect the full price is smaller than L1 layer. For the L1 layer of soil available nutrients, available nitrogen and phosphorus in different mowing regime there was no significant difference between; the L2 layer is different, whether mowing or cutting regime there was no significant difference after.5. Aboveground biomass of the seasonal dynamics showed a single peak curve, curves are basically the same shape. Seasonal changes in dry matter content it is clear that the growth of the early and late growth of the higher dry matter content, soil water content and dry matter content was a negative correlation between, and only reached a significant level of control.