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平衡施肥对多年生禾本科牧草产量的影响
Effect of Balanced Fertilizer Application on Yield of Perennial Grasses
【摘要】 在青海同德地区选取5龄同德老芒麦(Elymus sibiricus cv.Tongde)和5龄青海冷地早熟禾(Poa crymophilacv.Qinghai)人工草地连续两年进行了老龄人工草地平衡施肥试验。试验根据国际植物营养研究所(IPNI)中国项目部提供的测土施肥最佳配方(OPT)设6个施肥处理,另设一个不施肥对照,测量两种牧草品种的草产量及种子产量。结果施氮肥的经济效益高于施磷肥的效益,同德老芒麦的施肥效益高于冷地早熟禾的施肥效益,两种牧草平均草产量和种子产量以OPT-P施肥处理时为最高,分别为8946.2kg/hm2和368.1kg/hm2.氮磷肥互作产生负效应。施钾无显著增产作用。
【Abstract】 Five-year-aged Elymus sibiricus cv.Tongde and Poa crymophilla cv.Qinghai were used to carry out the valanced fertilizer application experiment selected in Tonged area of Qinghai provine The hay yield and seed yield of the two grasses were measured in six treatments and a control plots in the test.The results showed that the benefit of nitrogen fertilizer was higher than that of phosphorus fertilizer,and the benefit of fertilizer application on Elymus sibiricus was higher than that on Poa crymophilla.The mean hay yield and seed yield of the two grasses reach the highest at the OPT-P treatment,which are 8946.2kg/hm2 and 368.1kg/hm2 respectively.The negative effect appears when nitrogen and phosphotus were used simultaneously.Potassium fertilizer has no obvious effect.
【Key words】 Perennial grass； Elymus sibiricus cv.Tongde； Poa crymophilla cv.Qinghai； Fertilizer application； Yield.；
- 【文献出处】 青海畜牧兽医杂志 ,Chinese Qinghai Journal of Animal and Veterinary Sciences , 编辑部邮箱 ,2011年03期
- 【分类号】S543
- 【被引频次】4
- 【下载频次】156