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采用沙培方法，在温室中研究了氮和磷对胡桃楸幼苗根系、叶和当年高生长的影响。结果表明，氮和磷均能影响细根的生长，尤其是磷对提高细根生物量具有明显的作用。对粗根，氮质量分数增加５０％，导致粗根生物量增加１４％；磷质量分数增加５０％，导致粗根生物量减少２３．４％；而氮和磷质量分数减少５０％，粗根生物量分别减少１５．３％和１０．３％。氮和磷质量分数增加５０％，叶生物量分别增加１７．４％和３．５％；氮和磷质量分数减少５０％，叶生物量分别减少４１．７％和１５．７％。增加氮含量，对地上部分总生物量和当年高生长量有明显影响，而磷则无明显影响。但是减少这两种养分含量，细根／叶生物量的比例明显提高。
Using sand culture method, the effects of nitrogen and phosphorus on the root system, leaf and current high growth of Juglans manshurica seedlings were studied in greenhouse. The results showed that both nitrogen and phosphorus could affect the growth of fine roots, especially phosphorus had a significant effect on improving fine root biomass. For coarse roots, the nitrogen content increased by 50%, resulting in a 14% increase in crude root biomass; phosphorus content increased by 50%, resulting in a 23.4% reduction in crude root biomass; and nitrogen and phosphorus mass fractions decreased by 50% Biomass decreased by 15.3% and 10.3% respectively. The content of nitrogen and phosphorus increased by 50%, the leaf biomass increased by 17.4% and 3.5% respectively, the content of nitrogen and phosphorus reduced by 50% and the leaf biomass decreased by 41.7% and 15.7% respectively. Increasing the nitrogen content had a significant effect on the total above-ground biomass and the current high growth, while phosphorus had no significant effect. However, reducing these two nutrient contents significantly increased the proportion of fine root / leaf biomass.