【摘要】 利用长期定位试验1991-2001年的部分监测结果,分析了养分非均衡化对稻麦产量和紫色土生产力可持续性的影响。结果表明,长期不均衡施肥,随着试验年份的延长,稻麦产量逐年降低,紫色土生产力的可持续性差。NPK化肥平衡施用以及NPK化肥与有机肥配合施用稻麦产量稳定,紫色土生产力的可持续性最强。更多还原

【Abstract】 Based on the data in a lone-term experiment at the fixed location, the effects of nutrient non-equilibration on the yield of rice and wheat and on the sustainability of productivity of the purple soil were investigated. The results showed that the persistence of the soil system was much lower with the use of non-equilibrated NPK fertilizers, especially non-equilibrated N or NK fertilizers, and the yield of rice and wheat decreased progressively. The highest sustainability of productivity was observed on the plots where equilibrium NPK chemical fertilizer and organic fertilizer were applied.更多还原