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有些研究证明,杨树和刺槐混交能显著提高杨树的生长量,其增产的原因,一般认为是混栽后能提高土壤氮素营养,改善土壤养分状况和增强对病虫害的抗性。苏联学者指出,植物吸收磷的强度可以作为树木生理活动,特别是根系生命活动的指示剂。因此,比较纯林和混交林中各个树种对磷的吸收和转移的特性,可有助于了解混交树种间在磷营养方面的相互影响,进而为生产实践上制定栽培措施提供参考。
Some studies have shown that poplar and black locust hybrids can significantly increase the growth of poplar, the reason for its increase is generally believed that after mixed planting can increase soil nitrogen nutrition, improve soil nutrient status and enhance resistance to pests and diseases. Soviet scholars pointed out that the strength of plants to absorb phosphorus can be used as an indicator of physiological activities of trees, especially the root life. Therefore, comparing the characteristics of P uptake and translocation among all tree species in pure and mixed forests can be helpful to understand the interaction of phosphorus nutrition among the mixed tree species, and provide a reference for the cultivation practice in production practice.