氮、磷、钾组合对水稻农艺、生理比较效应的研究

Study on the Evaluation of Prescription Fertilizer Effect

表观肥料效应仅能反映植株养分累积量与经济产量的关系.单一养分、养分组合、比较效应等可通过农艺、生理效应研究氮、磷、钾组合对水稻生长发育的影响,从而较为系统、完善地研究肥料效应.该水稻试验表明水稻农艺效应,钾素效应最大,氮、钾平衡对生物量影响明显;生理效应,氮素效应明显,氮、磷平衡对经济产量影响最大;比较效应表明配方肥以3∶1∶1优于2∶1∶1配方.

Apparent effects of a fertilizer can only reflect the relationship between economic output and nutrient accumulation of the crop. For complete and systematical study of the fertilizer effects,prescription fertilizers such as single nutrient and compound nutrients are applied to study their effects on plant growth and development,with researching agronomy and physiological effects on plant. In a field trial with paddy rice,K was shown to have the greatest effect on the agronomy of the plants,and the balance of N and K had an obvious influence on biomass; N had an obvious effect on the physiology of the plants,and the balance of N and P had the greatest influence on economic output. It is concluded based on the comparative effects of the prescription fertilizers that a ratio of NPK of 3∶1∶1 is better than that of 2∶1∶1.