What are the key points for summer planting management of black sesame?
What are the main summer management practices for planting black sesame? Please give an introduction. For summer management of planting black sesame, you can refer to the following points: First, thin the seedlings in time and check for and fill in gaps: because sesame seeds are small and germinate in large numbers, when the first pair of true leaves appears after emergence, the seedlings should be thinned; when 2 to 3 pairs of true leaves have grown, the seedlings should be thinned further, and when 4 pairs of true leaves appear, the seedlings should be finalized, ...
What are the main summer management practices for planting black sesame? Please give an introduction.
For summer management of planting black sesame, you can refer to the following points:
First, thin the seedlings in time and check for and fill in gaps: because sesame seeds are small and germinate in large numbers, when the first pair of true leaves appears after emergence, the seedlings should be thinned; when 2 to 3 pairs of true leaves have grown, the seedlings should be thinned further, and when 4 pairs of true leaves appear, the seedlings should be finalized, generally leaving about 8,000 plants per mu; if poor soil moisture at sowing causes missing seedlings and broken rows, transplanting dense seedlings to fill sparse areas or sowing after sprouting can be used to ensure full and strong seedlings.
Second, intertillage and weeding, and hilling soil to prevent lodging: as the saying goes, "hoe millet when dry, hoe cotton when wet, and hoe sesame when neither dry nor wet." After thinning, shallow hoeing should be done to loosen the soil and remove weeds. When the seedlings are 5 cm tall, perform the second intertillage and finalize the seedlings. After that, carry out intertillage 1 to 2 more times, taking care not to damage the roots while hoeing. When the seedlings grow to about 33 cm, soil should be mounded around the base of the plants to resist wind and prevent lodging.
Third, topdressing at the flowering stage, and pinching the top: sesame needs a lot of fertilizer during the flowering stage, so at the early flowering stage, apply 10 to 12.5 kg of urea per mu, and at the full flowering stage use 120 to 150 g of potassium dihydrogen phosphate or active humic acid, foliar fertilizer, etc., mixed with water for foliar topdressing; at the topping stage, choose a sunny day and remove the top of the plant by hand, with a pinching length of 2 cm being appropriate.
Fourth, chemical regulation to promote yield increase: after the full flowering stage, use 40 to 50 g of paclobutrazol per mu mixed with 25 to 30 kg of water and spray evenly on the leaves. Spray less on poor-growing plants and an appropriate amount more on well-growing plants. Early spraying can increase yield by 8% to 10%.
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