Rapid increase in the production of marine shrimps in the coastal zone has resulted in large-scale con-version of mangrove forests to shrimp ponds.Productions of the shrimps in some regions have been unstable.Conse-qu...Rapid increase in the production of marine shrimps in the coastal zone has resulted in large-scale con-version of mangrove forests to shrimp ponds.Productions of the shrimps in some regions have been unstable.Conse-quently,a number of ponds are left idle.Restoring environmental conditions within the pond site by planting a suitablemangrove species considered an option.The experiment herein was carried out to explore the effect of planting methodson growth of Nipa palm in abandoned shrimp ponds in the Southern Thailand.Economically,coastal villagers in this areaearn their income from the palm in several ways,the most importantly in Nipa sugar production.Most seedlings wereplanted on top of furrows were constructed in the pond to avoid flooding,except for some seedlings which were planted inthe pond base where additional pond sludge were slightly filled up to compare their growth rates.The results showed thatplanting seedlings with attached rhizomes had the best growth rate and without seedling death at 14 months after plant-ing.At this stage,however,the height of seedlings grown from the fallen fruits was similar to those growth from barerooted seedlings(70 cm tall).Also,seedling mortality was not observed when growth from fallen fruits whereas about6% mortality was experienced by the bare rooted ones.Among the bare rooted seedling treatments,however no signifi-cant differences in growth rates were found when applying the soil with chemical fertilizers or farm manure or liming withCaCO3.In addition,it was found that seedling growth measured at 40 months after planting for those growths in pondbase was almost100% greater than those grown on the furrows.Therefore,this finding may be applied for the restorationof abandoned shrimp ponds by growing Nipa palm.展开更多
文摘Rapid increase in the production of marine shrimps in the coastal zone has resulted in large-scale con-version of mangrove forests to shrimp ponds.Productions of the shrimps in some regions have been unstable.Conse-quently,a number of ponds are left idle.Restoring environmental conditions within the pond site by planting a suitablemangrove species considered an option.The experiment herein was carried out to explore the effect of planting methodson growth of Nipa palm in abandoned shrimp ponds in the Southern Thailand.Economically,coastal villagers in this areaearn their income from the palm in several ways,the most importantly in Nipa sugar production.Most seedlings wereplanted on top of furrows were constructed in the pond to avoid flooding,except for some seedlings which were planted inthe pond base where additional pond sludge were slightly filled up to compare their growth rates.The results showed thatplanting seedlings with attached rhizomes had the best growth rate and without seedling death at 14 months after plant-ing.At this stage,however,the height of seedlings grown from the fallen fruits was similar to those growth from barerooted seedlings(70 cm tall).Also,seedling mortality was not observed when growth from fallen fruits whereas about6% mortality was experienced by the bare rooted ones.Among the bare rooted seedling treatments,however no signifi-cant differences in growth rates were found when applying the soil with chemical fertilizers or farm manure or liming withCaCO3.In addition,it was found that seedling growth measured at 40 months after planting for those growths in pondbase was almost100% greater than those grown on the furrows.Therefore,this finding may be applied for the restorationof abandoned shrimp ponds by growing Nipa palm.
