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Daming County, Handan City, Hebei Province, China Agricultural University Experiment Station from 2009 to 2010, from planting row spacing, nitrogen fertilizer research to explore their growth, forage quality and energy characteristics of switchgrass. The main results are as follows: 1. Planting line spacing and nitrogen fertilizer rates on the growth of switchgrass switchgrass flowering period, heading stage of plant height and hay production has an impact. In the flowering stage, A 2 B 3 (row spacing of 60cm, fertilizer 225kg/hm 2 ), A < / sub> B 3 (row spacing of 20cm, the fertilizing capacity of 225 kg / hm 2 ) the highest combination of plant height, respectively 75.94cm 72.72cm; heading stage A 2 B 3 (row spacing of 60cm, fertilizer 225kg/hm 2 ), A 1 2 (row spacing of 20cm, the fertilizing capacity of 150 kg / hm 2 ) the highest combination of plant height, respectively 107.51cm, 100.75cm. A 1 B 3 (row spacing of 20cm, fertilizer 225kg/hm 2 ), A 2 B < sub> 3 (row spacing of 60cm, the fertilizing capacity of 225 kg / hm 2 ) a combination of the highest hay yield, respectively 5615.31kg/hm 2 4973.11 kg / hm 2 . 2. Planting row spacing and nitrogen fertilizer on forage quality of switchgrass flowering switchgrass crude protein, neutral detergent fiber and acid detergent fiber content affects both off. A 1 B (3 line spacing to 20cm, fertilizer 225kg/hm 2 ) the A 2 B (3-spaced 60cm fertilizer 225 kg / hm 2 ) a combination of the highest crude protein content of switchgrass were 12.81% and 12.79%. A 2 B 2 (row spacing of 60cm, fertilizer 150kg/hm 2 ), A 1 B < sub> 1 (row spacing of 20cm, fertilizer 0kg/hm 2 ) the NDF the value of the lowest combination of switchgrass, were 66.69%, 67.27%; A 2 B 2 (row spacing of 60cm, fertilizer 150kg/hm 2 ), A 2 B 1 ( row spacing of 20cm, fertilizer 0kg/hm 2 ) ADF lowest combination of switchgrass were 41.24%, 41.57%; Forage Quality, according to the production and analysis of the above indicators seen in switchgrass as fodder in the flowering stage use A 2 of B 3 switchgrass growth in the combination treatment is better and crude protein content; if the NDF, ADF content demanding A 2 B 2 combination can be used, but A 2 B 2 combination of yield and crude protein The content of the performance in general. Planting row spacing and nitrogen fertilizer application of switchgrass energy indicators treatment of of switchgrass the heading stages ash, carbon content, a single point of net photosynthetic rate and planting around the soil organic matter content affects both. A 1 B 1 (row spacing of 20cm, fertilizer 0kg/hm 2 ) combination of the lowest ash content of switchgrass, 5.8%. A 1 B 3 (row spacing of 20cm, fertilizer 225kg/hm 2 ) the combination of the highest carbon content of switchgrass is 43.52%. A 2 B 3 (row spacing of 60cm, fertilizer 225kg/hm 2 ) combination of switchgrass single point of net photosynthetic rate of up to 12.97 μmol · m -2 · s -1 . Switchgrass influential shallow soil carbon sequestration in the first year of planting. Different treatment combinations calorific value content of switchgrass heading stage. In the energy sector, should select the low ash content and high calorific value content planting combination, not the line spacing and nitrogen fertilizer application due to the calorific value of the trial, should choose a low ash content the planting combinations A 1 B 1 , but taking into account the carbon sequestration effect of plant height, yield, and switchgrass, suggested the use of the A 1 B 3 A 2 B 3 combination. 4. Switchgrass carbon sequestration effect comprehensive carbon content, calorific value, single point net photosynthetic rate, planting around the determination of soil organic matter content, analysis of switchgrass solid carbon effect, various indicators are higher than the general crop, switchgrass not only is one kind of excellent energy plants, carbon sequestration contribute to favor environmental development.
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