试验证明栗树施Ｎ１５０ｋｇ／ｈｍ２效果极显著，每公顷产量增加９１８～１６５０ｋｇ，增产效果达到４９２％～５２３％，每公顷增加产值７３３５～１６５００元。为此，１５０ｋｇ／ｈｍ２纯Ｎ施用量可作为北方产区栗树施Ｎ指标。不同施Ｎ量与叶片中Ｎ、Ｐ含量的关系：在Ｎ０～Ｎ１５０处理之间二者呈显著正相关；在Ｎ０～Ｎ３００处理间，枝长、枝粗的增加与施Ｎ量有显著相关性。在叶片含Ｎ１６％～２４％、Ｐ００９６％～０１６０％区间内，产量随Ｎ、Ｐ含量的增加而增加，二者呈显著相关。施Ｎ量增加，叶片中Ｋ的含量变化不大，其主要原因是采叶时正逢栗果迅速膨胀时期，Ｋ主要供给果实发育。 Test results show that the chestnut tree N150kg / hm2 very significant effect, yield per hectare increased 918 ~ 1650kg, yield increased 49.2% 52.3%, an increase of output value per hectare 7335 ~ 16,500 yuan. To this end, 150kg / hm2 pure N application rate can be used as northern region chestnut Shi N indicator. There was a significant positive correlation between N application rates and N, P contents in leaves. There was a significant positive correlation between N application rates and N0 ~ N50 treatments. Between N0 ~ N300 treatments, the increase of branch length and branch diameter was significantly correlated with N application rate . Within the range of N1  6% ~ 24%, P0096% ~ 0160%, the yield increased with the increase of N and P contents, which showed a significant correlation. Application of N increased, the content of K leaves little change, the main reason is that when the leaves are picking up rapid expansion of chestnut, K main supply of fruit development.