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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
In this paper, we discussed the feasibility of the knowledge expression system of soil nutrient limitation spectrum, and concluded that there are not good theories and methods to evaluate the behavior of soil nutrients (soil nutrients) , More difficult. It is a better method to reveal and discriminate the soil nutrient limitation spectrum with “supporting yield” which is closely related to soil nutrient. Through the empirical study, we determined that the limiting nutrient spectrum of wheat in the experimental area was N> P> K> Zn, Mn> B> Cu and Fe with “supporting yield” > Fe, Zn> B, Cu, Mn. It shows that it is scientific and reasonable to judge the spectral order by the support yield, and pave the way for the systematic study of soil nutrient limitation