Humic acid fertilizer is a new type of fertilizers which contains humic substances.
It mainly include humates, nitro-humates and the purification products. The former two ones
are usually mixed with nitrogen, phosphorus, potassium and trace elements to make mixture
humics fertilizer which can be mainly used as base fertilizer. Humic acid purified is mainly used
for watering or spraying crops, as a growth regulator. It also could be used for soaking the
seeds to improve the germination rate and seedling cultivation.
Usage:
① Base fertilizer. Mixing, trenching or digging base with farmyard manure and 300 to 400 kg
aqueous solution which containing humic acid 0.02% to 0.05% per mu. Paddy soil can be
combined with preparation irrigation.
② Topdressing. Seedling stage and heading stage, 250 kg,aqueous solution with humic acid
containing 0.01% to 0.1% per mu, watering the roots nearby (Do not touch the root), paddy
fields who are applied sodium humate or potassium humate, can be applied with the irrigation,
to raise seedlings, strongen spike, promote growth.
③ spraying outside the root. Late flowering to early grain filling stage, spray the outer root two
or three times, each mu sprayed with 50 to 75 kg aqueous solution humic acid 0.01% to 0.05%.
It can make full grain, increase grain weight, and reduce empty flat rate. 2:00pm ~ 6:00pm to
spraying as well.
④ soaking. Use aqueous solution containing humic acid 0.01% to 0.05% to soak seeds,
( Seeds of vegetables, wheat and others soaked 5 to 10 hours, seeds of rice and cotton, soak
for 24 hours, ) can improve the germination rate, early emergence, enhance seedling rooting
ability.
⑤ seedling root dip, dip cuttings. Rice, sweet potatoes, vegetables and other transplanting
crops, dipping their roots with 0.05% to 0.1% sodium humate, potassium humate solution for
several hours before transplanting, or dipping transplanting seedling root, or soaking fruit
cuttings. These does can root quickly, increase secondary roots, shortening seedling
retardation phase stage and improve survival.