Multiple-effect compound fertilizer and preparing method and application thereof

• Main Authors: YANG ZHIPING, LIU MEIYING, HUANG QI, DAI XINGZHAO
• Format: Patent
• Language: English
• Published: 11.11.2015
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; CHEMISTRY; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; FERTILISING; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; PLANTING; SOWING; TRAPPING

The invention provides multiple-effect compound fertilizer for repairing cadmium soil pollution. The multiple-effect compound fertilizer comprises nitrogen, phosphorus and kalium nutritious components, rare earth element nitrate for agricultural use, waste catalyst agents, Chinese herbal medicine, humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite components, wherein the rare earth element nitrate for agricultural use, the waste catalyst agents, the Chinese herbal medicine, the humic acid mineral powder, the sepiolite, the plant ash, the kaolin and the zeolite components are used according to a proper ratio. After the compound fertilizer is applied to soil polluted by cadmium, the cadmium in the soil is effectively passivated and fixed through the synergistic effect of the components while the polluted soil is effectively repaired, the activity of cadmium in the soil is remarkably lowered, absorption of cadmium by crops is lowered, and thus the content of cadmium in the crops is lowered remarkably. Complex improver has good stability and environment-friendly performance and is free of secondary pollution and low in cost, and large-area popularization is easily implemented; when the fertilizer is applied to soil polluted by cadmium, the application amount is only 10-200 kg/hm , and the content of cadmium in the crops can be lowered remarkably and meets the national food safety standard.