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首页> 外文会议>ICEEP 2012 >Effects of Phosphorus Nutrition on Growth, Photosynthesis, and Ion Accumulation of Energy Plant Hybrid Pennisetum Seedlings under Salinity
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Effects of Phosphorus Nutrition on Growth, Photosynthesis, and Ion Accumulation of Energy Plant Hybrid Pennisetum Seedlings under Salinity

机译：磷营养对盐度杂交杂交幼苗生长，光合作用和离子积累的影响

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摘要

As an essential macroelement for all living cells, phosphorus plays a significant role in agricultural production systems. To better guide the establishment of the biofuel production systems of hybrid pennisetum, a popular energy plant with important potential in saline land, the effects of nutrient phosphorus on the growth, photosynthesis and ion homeostasis of hybrid pennisetum under salt treatment were examined with greenhouse pot experiments. Plant seedlings subjected to phosphorus deficiency （0.1 mmol?L~(-1) P and 0.2 mmol?L~(-1) P） increased in ratio of root to shoot and decreased in biomass. On the other hand, salinity inhibited the growth of hybrid pennisetum, but the effects of salinity on energy plants (Pennisetum americanum ×P. Purpureum) were influenced by the concentration of nutrient phosphorus. Salinity was more injurious to hybrid pennisetum seedlings in combination with a lower concentration of phosphorus （0.1 mmol?L~(-1) P, 0.2 mmol?L~(-1) P and 0.6 mmol?L~(-1) P) than it was with a higher concentration of phosphorus (1.0 mmol?L~(-1) P) (that gave optimum yields in the absence of salinity). In addition, no significant differences were observed between 1.0 mmol?L~(-1) P and 1.4 mmol?L~(-1) P levels at either NaCl level, indicating that 1.0 mmol?L~(-1) P was enough for the enhancement of both growth and tolerance to NaCl in hybrid pennisetum.
机译：作为所有活细胞的必要态切割，磷在农业生产系统中发挥着重要作用。为了更好地指导杂交Pennisetum的生物燃料生产系统的建立，一种流行的能源厂，具有盐渍土地的重要潜力，营养磷对盐处理下杂交杂交物质的生长，光合作用和离子稳态的影响。植物幼苗进行磷缺乏（0.1毫摩尔？L〜（-1）P和0.2毫摩尔？L〜（-1）P）中，以芽根的比率增加，并且在生物量下降。另一方面，盐度抑制了杂交猪的生长，但盐度对能量植物（Pennisetum Americanum×p。purpureum）的影响受营养磷浓度的影响。盐度为更损害组合混合狼尾草苗用磷的低浓度（0.1毫摩尔？L〜（-1）P，0.2毫摩尔？L〜（-1）P和0.6毫摩尔？L〜（-1）P）比它与磷的浓度较高（1.0毫摩尔？L〜（-1）P）（即，得到在没有盐度的最佳产量）。此外，观察到1.0毫摩尔？L〜（-1）P和1.4毫摩尔？L〜之间没有差异显著（-1）在任NaCl的电平P水平，表明1.0毫摩尔？L〜（-1）p是足够在混合白草生长和耐受性的NaCl的提高。

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