High-yield technology of dense-pod sesame

Sesame Yizhi No. 1 is a kind of sesame with high yield, drought resistance and lodging resistance, pods are very dense, one leaf is 3-7 capsules, overlapping, no culms are dense, the seeds are pure white, the oil content is more than 55%, the growth period is 110 days in spring sowing, 85-90 days in summer sowing, 100 kg ~ 150 kg sesame seeds per 667 square meters and 220 kg sesame seeds per 667 square meters.

1. Soil preparation and fertilization: before cultivated land, 1000 kg of farm manure, 40 kg of superphosphate, 10 kg of potassium sulfate or potassium chloride were applied every 667m2 to level the surface of the field.

2. Sowing technology: ⑴ drying seeds before sowing to enhance seed vigor. ⑵ was sterilized with 0.1% carbendazim. ⑶ sowing should not be too deep, 3 cm. ⑷ used 500g seeds every 667m2, and 120000 ~ 160000 seedlings emerged.

3. Field management: the first seedling of ⑴ should be early, the second seedling should be carried out in 2-3 pairs of true leaves, and 3-4 pairs of true leaves should set seedlings. It is suitable to keep 8000 seedlings every 667m2. ⑵ intertillage weeding and soil cultivation: from sesame seedling emergence to the beginning of flowering, there are generally three times of intertillage weeding, the first time, when a pair of true leaf seedlings of sesame seeds are irrigated, the second time, when sesame leaves are 2-3 pairs, and the third time, when 4-5 pairs of true leaves are carried out. Stop ploughing after the sesame is closed. Soil cultivation: the topsoil between the border can be cultivated in the rhizosphere, combined with secondary tillage to cultivate the soil, which can play the role of ridge lodging and ditch drainage and waterlogging prevention. ⑶ foliar fertilizer spraying: from the beginning of flowering to the flowering stage of sesame, on a sunny afternoon, 0.3% potassium dihydrogen phosphate is sprayed on the leaf, twice in a row, each time at an interval of 3 to 5 days. ⑷ management: ① sprayed 15 × 10 ^ (- 6) concentration of Zengchengling (4-iodophenoxyacetic acid) at the beginning of flowering stage, and sprayed with Yemanbao or Fushibao every 667m2 at flower bud stage, adding water 50kg ~ 70kg foliar spraying. When ② sprays each leaf surface of sesame at true leaf stage and early flowering stage once, it can make the medical capsule dense and high yield. ⑸ can increase yield by knocking off the top 2cm and 3cm 15-20 days before harvest.

4. Harvest: mature gradually after entering the final flowering stage for 15 days. Stems and leaves deciduous, lower capsule dehiscent. The top capsule is peeled and the tip of the sesame grain is reddish and can be harvested. If the harvest is too early, the yield will be reduced, and the yield can be increased by stages.

5. Pest control: ⑴ sesame stem blight control: soak seeds in 55 ℃ warm water for 15 minutes, the control effect is 90%; chemical control can use 0.1% carbendazim treatment seeds. Control of ⑵ sesame wilt: mix seeds with carbendazim, or spray diseased plants with 40% carbendazim 500x solution. ⑶ ground tiger, mole cricket control: with 90% trichlorfon 250g plus bait (spice) 50kg mixed with water, sprinkled on the root of the plant in the evening.