Dissertation
Dissertation > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > General Animal Science > Grassland Science,prairie school

Effects of Rehabilitating Improvement Measures on Soil and Vegetation of Grain for Green Perennial Artificial Grassland in Guo Ma Ying Area

Author DongWenBin
Tutor MaYuShou;ZhangDeZuo
School Gansu Agricultural University
Course Grassland
Keywords Grassland restoration of cropland Artificial grass Grassland Improvement Community structure Aboveground biomass Nutrients
CLC S812
Type Master's thesis
Year 2010
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Abandoned on the ground in Guinan County of Qinghai Province, Hainan Tibetan Autonomous Prefecture, Maying, select 2003 grassland restoration of cropland Elymus nutans planting grass (Elymus nutans) artificial grass as a test sample, according to test requirements, test plots divided into three treatment plots, processing 1: Qingyin No. 1 oats (Avena sativa cv. Qingyin No.1) Elymus nutans grass mixture re-establishing artificial pasture in mid-June 2008; processing 2:2008 In mid-June to cut through the turf fertilization improved artificial grass; processing: the implementation of any improvement measures as a control. Grassland restoration of cropland artificial grassland community structure and aboveground biomass of different improvement measures, forage nutrients dynamics and the measurement and analysis of soil nutrient content, aimed at understanding the impact of the improvement measures degradation artificial grass, the results are as follows: 1. Improved year to deal with an artificial grassland plant communities in three species, is under 2 Division 3 case, the dominant species of oats, the dominance of 77.2%. Processing the 2 artificial grassland plant communities in four species belonging to 3 families, genera, the dominant species Elymus nutans dominance 87.9%. Control plots plant communities by six species belonging to 4 families, 6 genera plots dominant species of grass Elymus nutans, the dominance of 66.5%. 2 year deal with an artificial grassland by four species belonging to 2 families and 3 genera the dominant species Elymus nutans grass, the dominance of 71.9%, 2 artificial grass by five species, belonging to 3 families and 5 genus, the dominant species Elymus nutans grass, the dominance of 67.9%, still six species under the 4 families, 6 genera dominant species Elymus nutans grass, the dominance of 60.5%. Improved 1 year and 2 years, of unimproved artificial grass species richness, diversity index, evenness index were higher than the two improved artificial grass. Improved 2 years, two improved the artificial grass species richness, diversity index, evenness index improved when an increasing trend. From mid-July 2008 to mid-September 2008 over the growing season, the artificial grass aboveground biomass presents the trend of a single peak. Which still appear and the highest value of the artificial grass aboveground biomass in the August 23, the aboveground biomass of 223.8 g/m2 to 283.1 g/m2, the highest value of the deal with an artificial aboveground biomass On September 3, the aboveground biomass of 361.7 g/m2. Two improved artificial grass aboveground biomass in each sampling period were higher than the control plots, and processing an artificial grassland aboveground biomass in each sampling period were higher than artificial grass. 3 In the first year of the improved treatment 1 compared with the control artificial grassland aboveground biomass increased by 45.3%, 2 artificial grass aboveground biomass increased by 26.5% compared with the control. Improved 2 years to deal with an artificial grass than the control aboveground biomass increased by 41.4%, 2 artificial grass aboveground biomass increased by 28.7% compared with the control. Groups from the economic point of view, in the improvement of 1 year and 2 years, the proportion of two improved artificial grassland grasses were higher than controls, the two improved artificial grass grasses are up more than 97% of the proportion processing 1 the artificial meadow grasses proportion higher than the processing of 2 artificial grass. Improved 1 year deal with an artificial grassland compared with a 21.8% increase in height still dominant species, artificial grass than on the still dominant species highly increased 30.9% in the second year of the improved deal with an artificial grass compared with the control plots dominant species is highly increased 32.6% to deal with 2 artificial grass over the still dominant species height increased 46.8%. Compared with the first year, and 2 years in improving the dominant species still the dominant species of ground height downward trend in the first 2 years, two improved artificial grass height upward trend. 5 July 17, 2008 to September 18, 2008, as the growing season goes on artificial grass forage crude protein, crude fat and crude ash content showed a downward trend, while the crude fiber content with the growing season goes on an upward trend. Both improved artificial grass crude protein content in each sampling period were higher than unimproved still, and processing the crude protein content of artificial grass at all sampling times higher than artificial grass. The highest value of various types of artificial grass forage crude fiber content presented for control gt; processing 2 gt; processing 1.6 modified 1 year and 2 years, artificial grass regardless of artificial grass modified or unmodified control plots soil organic matter, total nitrogen, available nitrogen, total phosphorus, available phosphorus content generally showed a decreasing trend with soil depth, while the pH value showed the opposite trend increases with soil depth. The view improved 1 year and 2 years, two improved artificial grassland soil layer of organic matter, total nitrogen, total phosphorus, available phosphorus, available nitrogen content were higher than the control, the pH value of the artificial grass changes in the range of 8.27 to 9.16, indicating that the various types of artificial grassland soils are alkaline.

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