The nitrogen, phosphor, potassium and other trace elements added for necessary of plants, it can be multi-functional and efficient liquid compound fertilizer complex.

配以植物所需的氮、磷、钾和微量元素后，可成为多功能、高效的液体复合肥。

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Introduced are some problems concerning the design of compound phosphate fertilizer thick liquid pump in the light of its structure, hydraulic design, and sealing.

从结构型式、水力设计、密封型式等方面论述了磷复肥料浆泵设计的有关问题。

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Through the leaching experiment, this paper studied on the slowly releasing characteristics of lignin compound fertilizer which was made of ammonia products of ammonia sulfite pulp black liquid.

通过肥料的沙柱淋溶性试验，研究了以亚铵法制浆蒸煮废液氨解产物为原料研制的木质素肥料的缓释特性。

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