p-k的音标

There was difference or significant difference between P level application treatments, difference appeared in some individual year for the N, K treatments.

尾叶桉、湿地松施P肥的各水平均达显著或极显著差异，施N、K肥的只在个别年度有差异。

A new labyrinth weir called P.K weir with the larger top and narrow bottom can increase weir's developed lengths and discharging, especially be suitable for modification of overflow dams.

堰顶部宽而底部窄，有效增加了堰的展长，增加了泄流能力，尤其适用于现有溢流坝的改造。

Applied bio-organic fertilizer and sesame seed cake fertilizer could increase the contents of N, P, K in flue-cured tobacco leaves, and promote total sugar accumulation, reducing the starch content, while there was no significantly effects on protein, nicotine and chloride content. 5.

增施生物有机肥和芝麻饼肥各处理均提高了烤后烟叶中N、P、K含量，促进了烟叶总糖的积累，降低了淀粉含量，对蛋白质、烟碱和氯离子含量的影响并不明显。