The invention discloses a
calcium-
boron compound
fertilizer. The raw materials of the
calcium-
boron compound
fertilizer comprise the following components in percentage by weight: 43-70% of
calcium chloride, 20-48% of
sodium borate, 4-9.1% of
citric acid, 0.2-2% of
sodium citrate, 0.2-1.5% of EDTA-2Na (
ethylene diamine tetraacetic acid-2Na) and 0.2-1.5% of
sodium tripolyphosphate. The finished compound
fertilizer product comprises the following components in percentage by weight: 15-24% of calcium and 4-10% of
boron. The invention also provides a preparation method of the calcium-boron compound fertilizer, which comprises the following steps: (1) respectively weighing the calcium
chloride, sodium borate,
citric acid,
sodium citrate, EDTA-2Na and sodium tripolyphosphate; (2)
grinding every
raw material into granules by using a grinder, and passing the granules through a 50-mesh screen for later use; (3) after
grinding, respectively adding the calcium
chloride, EDTA-2Na, sodium tripolyphosphate, and part of
citric acid and
sodium citrate into a V-shaped mixing
machine with a jacket, and stirring for 20 minutes, wherein in the stirring process, the
humidity is controlled at 1-2%, and the temperature is controlled at 120-150
Fahrenheit degrees; (4) adding the sodium borate, and stirring for 20 minutes while continuing keeping the temperature and
humidity; and (5) regulating the pH value to 3-6 with the citric acid and
sodium citrate.
Calcium and boron in the fertilizer are scientifically proportioned to obtain the fertilizer with rich nutrients, and the fertilizer can be used for producing excellent fruits and crops.