Sweet potato
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Sweet potato

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  • 1. Topic of Discussion Production technology of sweet potato
  • 2. Contents of discussion :Scientific Classification  origin  varieties  Climate  Soil, Planting time , seed rate, spacing,Manures and fertilizer, Irrigation, Diseases and Harvesting, Yield.  Medicinal importance  Nutritional value 
  • 3. Scientific Classification :Kingdom: Plantae Order: Solanales Family: Convolvulaceae Genus: Ipomoea Specie: batatas Scientific Name: Ipomoea Batatas L Local Name: Shakarqandi
  • 4. Origin :It is native to tropical America where it is called camote or kumara , and now it is an important tropical and sub tropical crop worldwide. The leaf of potato is very nutritious and are eaten by as a leafy vegetable .
  • 5. Varieties :Two varieties of sweet potato are commonly grown in Pakistan . Red skin with white flesh 2. White skin with white flesh Both are eaten as raw as well as roasted and cooked 1.
  • 6. Climate :The plant does not tolerate frost. It grows best at an average temperature of 24°C abundant sunshine and warm nights.  It require four months to grow .  It is drought resistant and produce susceptile crop without irrigation in semiarid condition . Annual rainfall of 102 cm (40”)  Irrigation is need for good yield 
  • 7. Soil :Well-drained sand, sandy loam ,and loamy sand , with a clay or clay loam subsoil are considered ideal for sweet potatoes.  Optimum pH 5.8-6.7 . 
  • 8. Planting time :Planting time varies considerably in different parts of the Pakistan  In hilly areas ,vine cuttings are planted during June and July .  In plains planting is done in Sep-Oct 
  • 9. Seed rate :It grown from sprout or draws produced from tubers , and also from cuttings .  For better growth it is advisable to plant selected tubers in nursery and then propagate them by sprout and vine cuttings  About 50,000-60,000 sets are required to plant one hectare . 
  • 10. Spacing :Selected tubers are planted 5-6 cm deep in well-prepared nursery beds at spacings of 30cm in rows 45cm apart.  Vines then planted 60cm between rows and 30cm within the rows .  During Monsoon , cuttings should be planted when it is drizzling. 
  • 11. Manure and fertilizer : It is grown in a variety of soils , so heavy application of manure promotes excessive growth .
  • 12. Irrigation :Water can be applied best after the plants are set before they nearly cover the ground .  Frequent light irrigation is preferable .  Newly planted crop should be irrigate on the fourth , eight and ninth days .  Therefore , 10-12 irrigations are given at 10-day intervals 
  • 13. Diseases :Bacterial :1. Crown gall 2. Hairy roots 3. Bacterial wilt o Fungal :1. Alternarial leaf spot 2. Anthracnose 3. Black spot 
  • 14. Diseases :Nematodes 1. Brown ring of roots 2. Lesion 3. Reniform 
  • 15. Harvesting :Usually crop take 90-100 days to mature  When the crop mature its leaf turn pale and later become yellow  The enlarging tubers cause the soil to crack noticeably , while the immature tubers remains moist and turns dark in color . 
  • 16. Yield : Average yield 10,000-12,000 kg/ha
  • 17. Medicinal Importance :1. Sweet potatoes are high in antioxidants, which work in the body to prevent inflammatory problems like asthma, arthritis, gout, and many more. 2. Sweet potatoes are an excellent source of carbohydrates for those with blood sugar problems. These fibrous root vegetables can help regulate blood sugar levels and prevent conditions like insulin resistance.
  • 18. 3. Sweet potatoes are healthy for the digestive tract. It helps to relieve constipation and may prevent colon cancer. 4. Sweet potatoes are good for those who are pregnant or trying to conceive because they are high in folate, which is essential for the healthy development of fetal cell and tissue. 5. Packed with important vitamins and other nutrients, eating sweet potatoes can boost immunity by supporting the needs of the body.
  • 19. 6. Sweet potatoes are good for preventing heart disease. High in potassium, sweet potatoes can help prevent the onset of heart attack and stroke. 7. Sweet potatoes are good for alleviating muscle cramps. Potassium deficiencies are a leading cause of muscle cramps, as well injuries. 8. Sweet potatoes are good for treating stress-related symptoms.
  • 20. Nutritional value : tryptophan15.6%  potassium15.4%  fiber15%  vitamin B510.1%  copper9%  vitamin B38.5%  Calories (102)5%