Hasil Udang Dan Cirri-Ciri Panen Vannamei Udang | Shrimp yields and harvest characteristics vannamei shrimp
Aeration :
A .5-1 ha pond would require four aerators installed at the corners of the pond approximately 3-5m from the bottom of the dike and positioned at an angle that will encourage the maximum water flow within the pond. The type of aerator to be used depends on the depth of the water. One horsepower paddle wheel aerators should be used in ponds of less than 1.2m water depth and the 2 HP (horsepower) paddle wheel aerators should be used in ponds deeper than 1.2 m. The most popular type of aerator is the long arm paddle wheel aerator, which is driven by a 2-10 HP electric or diesel motor mounted on the dike. The aerators should be switched on 24 hrs before the PL are stocked to allow enough time to create the current and clean up the feeding area.
Stocking Density :
When a farm is ready for operation the optimum stocking density of PL in a pond should be determined in accordance with the production capacity of the farm and the culture system which include the soil and water quality food availability, seasonal variations, target production and farmers experience. It is recommended that farmers should start a new crop with a low stocking density to access the production capacity of the pond. If production is successful then the stocking density could be increased for subsequent crops. Overstocking should be avoided since it may result in management problems and loss of entire production.
The stocking density between 10-20 PL/m2 is usually practiced in a semi-intensive culture. In an intensive culture a well managed pond with consistent good water quality can stock up to 25-30 PL/m2 at 1.2m water depth and up to 40-50 PL/m2 at 1.5m water depth or deeper. However, it must be emphasized that intensive cultures involve high densities and can only be sustained in well managed farms under an experienced farmer.
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