中国农业科学 ›› 2008, Vol. 41 ›› Issue (7): 2143-2148 .doi: 10.3864/j.issn.0578-1752.2008.07.036

• 畜牧·资源昆虫 • 上一篇    下一篇

不同牛粪施用量对矮象草产草量、营养物质含量及干物质降解率的影响

何余湧,石庆华,谢国强   

  1. 江西农业大学动物科学技术学院
  • 收稿日期:2007-01-25 修回日期:1900-01-01 出版日期:2008-07-10 发布日期:2008-07-10
  • 通讯作者: 谢国强

Study on the Effect of Different application rate of Beef Cattle Feces on Yields and Nutrients Level of Dwarf elephant grass and on the Degradation Rate of Nutrients

  

  1. 江西农业大学动物科学技术学院
  • Received:2007-01-25 Revised:1900-01-01 Online:2008-07-10 Published:2008-07-10

摘要: 【目的】阐明不同牛粪施用量对矮象草产量、营养物质含量及干物质降解率的影响,旨在通过合理施用牛粪提高矮象草的营养价值、降低牛粪中氮、铁、锌和铜等物质对环境的污染。【方法】试验设置不施牛粪(0 kg鲜牛粪/10 kg土)、低量牛粪(3 kg鲜牛粪/10 kg土)和高量牛粪(6 kg鲜牛粪/10 kg土)3组处理,采用盆栽试验和肉牛瘤胃降解试验测定了在不同牛粪施用量下矮象草的产草量、营养物质含量及营养物质降解率的变化。【结果】施用低量和高量牛粪均能极显著的(P<0.01)提高矮象草的茎和叶干物质产量,其中茎干物质产量分别比不施牛粪提高45.5%和54.5%,叶干物质产量分别提高85.7%和121.4%;施用低量和高量牛粪矮象草叶蛋白质含量和中性洗涤纤维含量也显著地(P<0.05)高于不施牛粪,其中叶蛋白质含量分别提高13.3%和20.9%。矮象草植株中锌和铜累积能力均表现为:根>叶>茎。有机物在瘤胃内尼龙袋中的降解率随牛粪施用量的增加和在瘤胃内的停留时间的延长而增加。【结论】增加牛粪施用量可提高矮象草的产草量、营养物质含量及干物质在瘤胃内的降解率,从而提高矮象草的饲用价值,减少日粮中蛋白质饲料和微量元素添加剂的使用量,但牛粪的适宜施用量还有待于进一步深入研究。

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