How to use bio-organic fertilizer to prepare vegetable nursery nutritious soil

From late August to early October, for the spring and summer sweet potato root swelling, this period is the key period for the formation of yield, but also the most demand for fertilizer, the following three methods can be topdressing.

First, hole eye dressing method: with a piece of wood rake, in the 20-30 cm away from the sweet potato root, playing a deep hole about 30 cm, into the appropriate amount of three-element compound fertilizer, and sealed with wet soil, if on both sides of the ridge Each hit a hole, the effect is better. This method increases production by about 20%.

Second, the crack top dressing method: when the cracks in the sweet potato expansion surface, 500 grams of potassium dihydrogen phosphate per acre, add water, 400 kg, or 2.5 kg of urea and superphosphate 10 kg, add 500 kg of water, dubbed fertilizer solution irrigation cracks, each 0.7 to 1 kg of strain. After half a month, 100 kilograms of ash and 500 kilograms of water (soaked for 4 hours) were used per acre, and the filtered liquid was irrigated and sealed. This method increased the yield by more than 300 kilograms.

Third, foliar dressing method: foliar spray 0.3% potassium dihydrogen phosphate (or 2.5% potassium sulfate, 10% herb ash, 2% ammonium sulfate, 0.3% superphosphate, 0.3% urea) aqueous solution, spray once a week, this Actual yield increases by 18% to 20%.

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