Forest Rebuilding

Locust tree (Robinia pseudacacia) is grown in hilly areas and campie.Density per hectare, is 5000 trees, the planting distance of 2x1m recommended. After extracting seeds from pods (in November-January), they paste and then stored in bags. Germination is 70-90%. In one kilogram seeds are 49000-54000. For seeding, seeds are brewed with water at 75-95 * C and keep in hot water (50-60 grage C) another 10-12 hours, or scarify. Late spring seeding is practiced at a depth of 5-6 cm. Emergence takes place after 10 days, the percentage of 28-30%. Production cycle is 1 year, juveniles with a minimum diameter at the base of 6mm.


Methods of scarifying

Some seeds are so hard shell is impervious to water and gas. (Eg acacia, castor yellow). These seeds will not germinate until their skin is altered (modified) physical. Seed shell is necessary for seeds to germinate. In fact, many seeds have skin as physical barrier for the state of sleep to stop germination.
Any process of breakage, thinning, drilling, grinding or mechanically altered seed shell to make them permeable to water and gas is known as scarification. By altering the seed shell with this procedure is pemisa water absorption by them. In nature this process occurs due to exposure to freezing temperatures or microbial activities that change the properties of skin in winter.
Scarifying seeds occur by passage through the digestive tract of birds and animals.
Scarification methods are common: the mechanical action, hot water and exposure to acids.

A. Mechanical scarification. Involves breaking or weakening shell seeds and can be done with sandpaper or a file for skin abrasion., Using a knife to slash (crack) shell, or using a hammer to break the shell to allow water to enter. This operation is done carefully so as not to damage the embryo crush seeds. After scarification, seeds should be planted as soon as possible or cold, moist stratification made if necessary. This treatment works well for larger seeds. Smaller seeds can be rubbed between sheets of fine sandpaper. If the seeds are too small to see progress, a different method should be soaked in water.
Two. Scarification with hot water. Some shells of seeds can be soaked in warm or hot water (75-95 ° C but that nufiarba!) Seeds are left to soak in cool water for 12 to 24 hours before planting. Use of 10-20 times the volume of hot water to seeds. Seeds with a layer of wax should be washed several times in very hot water to remove wax before dipping the final.
Three. Acid scarification. Seeds are placed in a glass container (Do not use containers of any other material) and covered with concentrated sulfuric acid at about twice the volume of seeds. Seeds are easy to mix and allow to soak for 10 minutes to several hours depending on the hardness of the shell. When skin becomes thin, the seeds can be removed, cleaned and planted. This method involves the use of concentrated sulfuric acid, which is one of very dangerous chemicals that can be very dangerous for an inexperienced person and require very specific safety measures that should not be overlooked! It is important to remember never pour water into acid ! ALWAYS pour acid into water!