土壤养分限制谱序的知识表达和判别体系探讨

本文通过对土壤养分限制谱序的知识表达体系在可行性方面的讨论 ,认为以土壤养分自身的行为特点 (土壤养分 )作为谱序的评价指标和表达方式目前没有较好的理论和方法可遵循 ,难度较大。用与土壤养分密切相关的“支撑产量”揭示和判别土壤养分限制谱序是目前较好的方法。通过对其进行实证研究 ,用“支撑产量”判别出试验区小麦的土壤养分限制谱序为N >P >K >Zn、Mn >B >Cu、Fe ;玉米的谱序为N >P、K >Fe、Zn >B、Cu、Mn。说明用支撑产量判别谱序是科学合理的 ,为土壤养分限制的系统研究铺垫了新的思路和途径

Discussion the Order of Soil Nutrient Limiting Factors and the Evaluation System

In this paper, by discussing the feasibility of soil nutrient limiting factor's intellectual expressing system, provided that there was no more reasonable method and it is difficult in using the nature of soil nutrient itself (soil nutrient) as evaluating indicators and intellectual expressing way at present. It was a better method using the sustaining yield, which is inseparably related to soil nutrient for research and evaluation the of order of soil nutrient factors at present. By experimental research, the order of soil nutrient factors of wheat is N>P>K>Zn?Mn>B>Cu=Fe and the order of soil nutrient factors of corn is N>P?K>Fe , Zn>B=Cu=Mn.Thios indicates that using sustaining yield to evaluate the order was reasonable scientifically.