Four ways to increase production by planting sweet potato

Inverted planting first cut off the top 2-3 stems of sweet potato seedlings, and then cut the petioles and leaves of the upper two stems of each section into one section, retained the petioles and leaves of the lower two stems, and planted inverted on the ridge box. It is appropriate to leave a petiole base to expose the ridge surface, and the seedling distance is generally about 15 cm. Although the growth of inverted sweet potato is slower than that of smooth planting, due to the reversal of the direction of water and organic matter absorbed by the root of transport tissue in the stem, the transportation speed is slowed down, and a large amount of organic nutrients are overstocked in the root, which is beneficial to the expansion of sweet potato blocks. it can increase the yield by more than half.

Take off the top when the main stem of sweet potato grows to 40-50 cm, pick the terminal bud in fine weather in the morning, and continue to remove the terminal bud when the branch grows to 30-35 cm. This method can inhibit stem growth, avoid nutrient consumption, promote root expansion, and increase yield by 20-30%.

Crack irrigation sweet potato enters the root expansion period, cracks will appear in the surface soil layer. At this time, using water manure 750kg / mu, potassium dihydrogen phosphate 500g (can also use calcium superphosphate 5kg, plant ash 50kg, soaked and filtered respectively), mixed in manure, irrigated along the cracks in the morning or evening, and filled with soil after irrigation, the yield can be increased by 20-1000.

When sweet potato seedlings grow to 50-60 cm long, 10 ml of metoprolol or 20-25 ml of auxin per mu can control the upper part to promote the lower part, promote the rapid growth of root tuber, and increase the yield by 15-20%.