关键词: 牛粪施用量, 矮象草, 产草量, 营养价值, 降解率

Abstract: Abstract: 【Objective】 We conducted an experiment to study the effect of different application rate of fresh cattle feces on Dwarf elephant grass yield, nutrients content and nutrient degradation rate in order to find a measure of increasing nutrients value of Dwarf elephant grass and decreasing the pollution of nitrogen, ferrus, zinc and copper of feces on environment by the way of reasonable application with cattle feces.【Method】Dwarf elephant grass were treated with fresh beef cattle feces at three application rate: Nil, low application rate(3kg fresh cattle feces/10kg soil)and high application rate(6kg fresh cattle feces/10kg soil), respectively to study the effect of cattle feces on Dwarf elephant grass yield, nutrients content and nutrient degradation rate with a trial of planting Dwarf elephant grass with plastic pot and a trial of degrading nutrients in ruman with nyron bag. 【Result】Results indicated that low and high application rate of fresh cattle feces significantly(p<0.01) increased the yield of stem and leaf drymatter, it was 45.5% and 54.5% higher in the yield of stem drymatter than that of Dwarf elephant grass applied fresh feces at a level of nil , respectively; for the yield of leaf drymatter, it was 87.5% and 121.4% higher, respectively. Low and high application rate of fresh cattle feces significantly(p<0.05) increased the level of leaf protein and neutral detergent fibre of Dwarf elephant grass, it was 13.3% and 20.9% higher than that of Dwarf elephant grass applied fresh feces at a level of nil, respectively. The ability of accumulating Zn and Cu ranked as follows: root> leaf > stem. Degradation rate of N, Fe,Zn,and Cu increased as the increase of application rate of feces and duration of sample in rumen.【Conclusion】the yield, nutrients content and nutrients degradation rate of Dwarf elephant grass increased as the application rate of feces increased, much more works still need to be done for the optimun application rate of feces used for planting Dwarf elephant grass. To plant Dwarf elephant grass with cattle feces is a good method of increasing the level of N, Zn and Cu of Dwarf elephant grass and alleviating pollution on feces on environment.

Key words: Application rate of cattle feces, Dwarf elephant grass, Yield, Nutritive value, Degradation rate