植物对不同氮营养生境的生理生态响应

The Ecophysiological Response Of The Vegetation To The Different Nutrient Nitrogen Habitat

由于氮素形态的差异,所以对植物生理特征和生长发育的影响不同。植物在长期进化过程中形成了对不同氮素形态的偏向选择性。本文从NH4+和NO3-的分子吸收机制、根对NH4+和NO3-的相对吸收能力、养分关系与养分平衡、氮同化酶及光合作用等多方面因素阐述了植物对不同氮素营养环境的生理生态响应机制。阐明这些由氮素形态产生的生理变化最终导致了植物生长差异。

Because of the different for the nutrient form, it produces the different effect on the vegetation physiological characteristics and growth and development. Plants have formed a biased selectivity of different nitrogen forms in the long evolutionary process. The particle discusses ecophysiological response of the vegetation to the different Nutrient nitrogen habitat based on the molecular absorption mechanism for NH4 ＋ and NO3 - ,the absorption ability for the NH4 ＋ and NO3 - of the roots,the balance of the trophic relationships and trophic balance,nitrogen assimilation enzymes and photosynthesis. At last, the particle discusses the reason of the growth variation of vegetation because of the physiological change with the nutrient form.