plasma phosphorus level 血浆磷水平
inorganic phosphorus level 无机磷浓度
available phosphorus level 供磷水平
soil test phosphorus level 土壤测试磷
nitrogen and phosphorus level 氮磷含量
excessively high level of phosphorus 过高的磷水平
level of phosphorus 血磷含量
Serum phosphorus level increased as dietary phosphorus increased and decreased as dietary calcium to phosphorus ratio increased.
血清磷随日粮磷增加而增加，随日粮钙磷比例增加而下降。
With the increasing of the light period length, the growth rate and cell density rose gradually and exogenous phosphorus level declined rapidly in the water.
延长光照时间能加快微囊蓝细菌的生长速率和提高微囊蓝细菌的密度。
A field experiment was conducted to study the effect of different nitrogen and phosphorus level on total fresh weight and fresh weight of edible stems of Salicornia bigelovii Torr.
采用田间试验研究了不同氮磷水平对北美海蓬子生长和品质的影响。 结果表明，氮、磷肥及其适量配合施用，北美海蓬子的总鲜质量和菜用产量都显著或极显著增加；
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