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对引进树种牛蹄豆幼苗生长和光合特征中的氮磷响应进行了研究。结果表明牛蹄豆对氮磷的适应性均较强,即随供氮量的增加,牛蹄豆的根冠比、根生物量比显著降低;在较大的氮范围内,牛蹄豆的总生物量都随供氮量的增加而显著增加,超过0.1g/kg土则显著下降;随供磷量的增加,牛蹄豆的根冠比、根生物量比降低,总生物量显著增加;无论在供氮量增加还是在供磷量增加的情况下,牛蹄豆的比叶面积增加,株高、叶氮、叶磷、净光合速率显著增加。
The responses of nitrogen and phosphorus in the growth and photosynthetic characteristics of seedling of introduced Levitra bean were studied. The results showed that the adaptability of ox. Leguminosae to nitrogen and phosphorus were high, that is, the ratio of root to shoot and root biomass of L. capitatum decreased significantly with the increase of nitrogen supply. In larger nitrogen range, The total biomass increased significantly with the increase of nitrogen supply, but decreased significantly when the content of nitrogen exceeded 0.1g / kg. With the increase of P supply, the ratio of root / shoot biomass and root biomass decreased and the total biomass increased significantly The specific leaf area increased with the increase of nitrogen supply and the increase of phosphorus supply. The plant height, leaf nitrogen, leaf phosphorus and net photosynthetic rate increased significantly.