High yield of black sesame in summer to catch the fourth ring

First, determine seedlings in time, check seedlings to fill gaps: because sesame seeds have a large number of small seedlings, sparse seedlings should be grown when the first pair of true leaves grow to 2-3 pairs of true leaves, and 4 pairs of true leaves should be fixed seedlings, generally leaving about 8000 seedlings per mu; if the seedlings are short of ridges due to poor soil moisture during sowing, you can use densification and sparse or sprouting sowing to ensure that the whole seedling is strong. Second, ploughing and weeding, cultivating soil to prevent toppling: as the saying goes, "dry hoe millet wet hoe flower, not dry not wet hoe sesame", after the seedlings should be shallow hoe loose soil to weed, when the seedling height is 5 cm, the second intermediate ploughing and fixed seedlings, and then ploughing twice, pay attention to hoeing do not hurt roots, seedlings grow to about 33 cm, should obstruct the soil to resist wind and lodging. Third, topdressing at flowering stage, topping and heart-picking: Sesame needs more fertilizer at flowering stage, 10-12.5 kg urea per mu should be applied at the early flowering stage, 120-150 grams of potassium dihydrogen phosphate or active humic acid and foliar fertilizer should be used for foliar topdressing of water at full flowering stage; in the capping period, the top of the plant should be removed by hand on a sunny day, and the coring length should be 2 cm. Fourth, chemical regulation and promotion of yield increase: after the full flowering stage, 40-50 grams of paclobutrazol were sprayed evenly on the leaves of 25-30 kilograms of water, less spraying for those with poor growth, and more spraying for those with good growth, and early spraying could increase the yield by 8% and 10%.