FAQ - Drought

FAQ - Drought Management

  1. How drought effect can be distinguished from other stresses?
  2. Stunted inter-nodes, drying of bottom leaves (but not top leaves or crown) and inward rolling of top leaves are some indicators of drought effect.

  3. Whether yield or sugar content is affected due to drought?
  4. Cane yield is affected more than sucrose %juice. Since drought reduces cane elongation (about 30%) yield loss is more.

  5. At what stage the drought effect is critical to sugarcane?
  6. Early stages of growth, particularly the active tillering period is very critical in drought situations

  7. What are the easy ways to manage drought under field condition?
  8. Soaking of setts in saturated lime water (40%) before planting, urea and potash spray (2.5kg each/100litres) during drought at 15-20 days interval, and trash mulching are some easy ways to manage drought.

  9. What are the currently available drought tolerant sugarcane varieties?
  10. Varieties Co 86032, Co 88006, CoTl 88322, Co 95014, Co97008, Co 99004, Co 95003, Co 95006, Co 94012, Co 96009, CoJn 86-600, VSI 9/20, Co 99012, Co 97001 and Co 96023 are some drought tolerant varieties.

  11. What is the suitable planting method for improving sugarcane production under early drought and late waterlogged conditions?
  12. Deep trench system of planting is recommended for improving sugarcane production under early drought and late waterlogged conditions. Planting in deep trenches with gypsum (2.5 t/ha), FYM (25 t/ha) and pressmud (12.5 t/ha) application improves the cane yield over normal method of planting under these situations. Study on the suitability of different depths of trenches revealed that 30-cm, deep trench gave highest cane and sugar yield with an additional profit of about Rs. 10000 over control. It also facilitates to take two or more economical ratoons, which is not possible by normal method of planting. Further improvement of yield under trench system of planting could be obtained by application of 25% excess nitrogen.

More FAQ...

  1. What are the drought management practices recommended for mitigating drought stress in sugarcane?

  • Early planting helps the crop to put up sufficient growth before the moisture stress sets in.
  • Deep ploughing will enable the roots to penetrate deep into the soil and help to withstand drought.
  • Trash mulching is a highly useful technique to conserve soil moisture and to reduce the impact of moisture stress. Mulching also moderates soil temperature, helps in improving germination, better tiller survival and checks weed growth.
  • Soaking the setts in a saturated lime solution for one hour before planting is a useful drought hardening measure. The saturated lime solution can be prepared by dissolving 80 kg kiln lime (burnt lime) in 400 litres of water. This treatment enhances germination and also gives ability to the crop to withstand drought
  • Under the deltaic conditions where early drought and late waterlogging is common, deep trench system of planting would be highly useful
  • Skip furrow irrigation / alternate furrow irrigation are modifications of furrow irrigation system which help to utilize the available water more efficiently.
  • Foliar application of urea and muriate of potash each at 2.5% concentration (2.5 kg urea + 2.5 kg KCl in 100 litres of water) during the drought period at 15 - 20 days interval is helpful to retain more number of vigorous shoots till the moisture condition becomes favourable.

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