氮、磷施用对禾本科牧草产量及品质影响的整合分析

Mate Analysis of Effects of Nitrogen and Phosphorus Application on Yield and Quality of Gramineous Forages

运用整合分析的方法定量研究化肥施用对我国牧草产量和品质的影响,以评估化肥在牧草增产中的作用,为牧草合理施肥提供科学依据。通过收集整理国内14篇已发表文献的数据,建立氮磷化肥用量和牧草产量的数据库,比较分析不同梯度氮磷配施对中国牧草产量的整体影响及其影响因素。结果表明,在平均施肥条件下,氮肥施用对牧草增产的影响更大,土壤有机质、全氮、全钾等因素是影响牧草产量的最大因素。在氮磷混施条件下,磷肥的施用量对牧草品质影响较大,氮肥的施用量对牧草的影响较小。

The effects of chemical fertilizer application on forage yield and quality in China were quantitatively studied by mateanalysis to evaluate the role of chemical fertilizer in increasing forage yield and provide scientific basis for rational fertilization of forage. A database of nitrogen and phosphorus fertilizer application rates and forage yield was established by collecting data from 14 published literatures in China. The overall effects of different gradients of nitrogen and phosphorus application on forage yield in China and their influencing factors were compared and analyzed. The results showed that under the condition of average fertilization,nitrogen fertilizer application had a greater impact on forage yield, and soil organic matter, total nitrogen, total potassium and other factors were the biggest factors affecting forage yield. Under the condition of nitrogen and phosphorus mixed application, the amount of phosphorus fertilizer had a greater impact on forage quality, and the amount of nitrogen fertilizer had little effect on forage quality.