soil p availability 土壤磷有效性
soil with low P availability 贫磷土壤
availability of p p有效性
P spatial availability 磷空间有效性
P date of availability 可到职时间
·2,447,543篇论文数据，部分数据来源于NoteExpress
Plant growth should be expected to be limited by nitrogen (n) and phosphorus (p) availability in most terrestrial ecosystems.
陆地生态系统植物的生长受到营养元素氮(N)和磷(P)的可利用性的限制。
P forms in soil and their availability;
土壤中磷的形态及其有效性；
The total score of social support, scores of subjective support, objective support, support availability of the experimental group were significantly lower than those of the controls (P<0.05 for all).
观察组社会支持总分及主观支持、客观支持和对支持利用度评分显著低于对照组（均P<0.05）；
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