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）；
The growth of P. subcordiformis is strongly depressed by high density U. pertusa even at high phosphorous availability.
结果显示，不论营养盐浓度如何，高密度的孔石莼皆能显著抑制浮游微藻的生长。
The total scores, the subjective support and social support availability of SSRS among patients with irrigation of bladder were lower than those of the ordinary group( P< 0.01 ).
②灌注组在SSRS中的社会支持总分、客观支持、社会支持的利用度评分显著低于普通组（P<0.01）；
The different objective support, support availability and social support scores existed in different professions (P< 0.05);
不同性别的主观支持得分比较，差异有统计学意义（P<0.05）；
The different objective support, support availability and social support scores existed in different professions (P< 0.05);
不同性别的主观支持得分比较，差异有统计学意义（P<0.05）；
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