哪些对植物生长的有益元素正在急剧减少？

And which dwindling element is essential to plant growth?

所含有益元素与人体必需元素基本一致。

The useful elements in it almost agree with the ones that are necessary to human bodies.

在施用氮磷钾肥基础上配施硅肥 、 硼肥等有益元素和微量元素,探讨其对百合生长的影响.

Effects of silicon, boron and other trace elements on the physiological properties of lily were studied.

此外，某些植物还需要一些其他的有益元素。

In addition, some plants may need other elements.

矿床中除铅锌矿外还伴生有银、硫、铜、锰等多种有益元素。

The lead-zinc ores contain Ag, S, Cu, Mn, etc.

试验结果表明，锡、铟是银基钎料中的有益元素，其最佳含量均为5％。

The results show that Sn and In are advantageous elements in silver filler metal and the optimum content for both is up to 5 % respectively.