Uzgoj oraha – Ukoliko ste zasadili kalemljeni orah mozete ocekivati da ce poceti da radja vec od trece ili cetvrte godine a prinos u punom jeku. Prakticno vocarstvo za svakoga [gajenje vocaka umerenog podrucja, oraha i jagodicastog voca]. . Brzica K. Ministere de l’ Agriculture, Bruxelles ( Belgium). Browse gajenje oraha pictures, photos, images, GIFs, and videos on Photobucket .
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Cijene se krecu jos uvijek kn za sadnicu velicine oko 1m. Proslo proljece sam zasadio kom, sutra ide jos kom na popunjavanje praznina u redovima. Bit ce ogrijeva za 10 godina Kako se razlikuje bagrem od akacije.
The genus Robinia, with four species native to temperate regions of North America, is noteworthy for an ability to tolerate severe frosts. It is also adaptable to environmental extremes such as drought, air pollutants, and high light intensities Hanover Rapid growth, dense wood, and N fixing ability fajenje it ideal for colonizing degraded sites.
Black locust is a medium-sized tree reaching m in height and 0. Long cm pinnate leaves consist of small, oval, alternate leaflets. Sharp spines are found at the nodes of oraua branches but are rare on mature wood. The smooth bark becomes reddishbrown and deeply furrowed with age. White agjenje pink, fragrant flowers in cm long, hanging racemes appear in early summer soon after the leaves.
The closed flowers require bees to force petals open for cross-pollination.
The small pods contain hard-coated seeds which can persist in the soil for many gauenje. Seed crops occur every years beginning at age 3; pods open on the tree in winter and early spring. Black locust is native to regions with 1, mm annual rainfall, yet it is drought-tolerant and survives on as little as mm.
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It occurs on upland sites in hardwood forests with black oak, vajenje oak, chestnut oak, pignut hickory, yellow poplar, maple, and with ash along streams.
In the northern part of its range at m elevation it occurs with Picea rubra and Acer saccharum Keresztezi b. First introduced to France and England inblack locust has become increasingly important throughout Europe and in parts of Asia Keresztesi a.
It has even been grown at higher, cooler elevations in the tropics e. It is found on a variety of soils with pHs of 4.
Trees do not tolerate water-logging.
Extremely intolerant of shade, the trees are pioneers on disturbed soils or burned sites. Black locust dominates early forest regeneration in many native forest stands where it occurs Boring and Swank Treatment gajenme concentrated sulfuric acid for min is most effective.
Seeds can also be nicked, soaked in boiling water for several minutes, or washed in aerated cold water for days.
Trees sucker readily from roots and also graft easily. They can be propagated, with difficulty, from hardwood cuttings cm long and cm diameter collected in winter or early spring. Treatment with indole acetic acid improves rooting. The tree responds well to tissue culture and has been mass propagated by this method.
In nursery culture black locust is either direct seeded or root sections cm long planted. The species has one of the highest net photosynthetic rates among woody plants. Black locust grows rapidly, especially when young. Trees can reach 3 m tall in one growing season and average 0. Trees attained 12 m ht in 10 yrs and 20 m ht in 25 yrs in Orzha Singhand 26 m ht and 27 cm diameter in 40 yrs in the US.
On poor sites, such as strip mines in the US, oven-dry biomass yields range from 3. Fuelwood plantations in S. Korea coppice readily and are lopped annually for fuel NAS Natural variation in numerous traits has often been gajrnje and many cultivars described. Most of the diversity resided within seed sources with low geographic variation.
Cultivars vary in crown and stem form, growth rate, growth habit upright vs. Clonal selection, early pruning, and close spacing have been effective means of producing straight-stemmed black locust in plantations especially in Eastern Europe. Comprehensive germplasm collections and plantings for provenance tests were begun in at Mich.
Efforts in crossbreeding are under way to improve the tree for growth rate, borer resistance, stem form, thorn-lessness, or other traits Hanover et al. In Hungary, a large array of tall clones is in commercial use Keresztesibased on seeds from trees of “shipmast locust” originating from Long Island in New York State.
Black locust wood is strong and hard with a specific gravity of 0. The wood makes a good charcoal. Wood energy yield is typical of temperate broadleaf trees, about The beautiful light to dark brown wood is used to make paneling, siding, flooring, furniture, boat building substitute for teakdecking, vineyard or nursery props, fruit boxes, and pallets.
It is also a preferred wood for pulp production. Black locust wood is highly resistant to rot Smith et al. Black locust has become an important tree in the Himalayas where it is heavily lopped for fodder Singh However, tannins and lectin proteins found in leaves and inner bark can interfere with digestion in ruminants and in nonruminants Harris et al.
Tannin levels are high in young leaves but decrease as leaves mature. Bees harvest Robinia nectar to produce a honey regarded as one of the world’s finest. Tree improvement specifically for late flowering and high nectar sugar content is ongoing in Hungary and the US.
The tree is used extensively to rehabilitate surface mine tailings in the US. In Hungary, black locust is often grown for wood on small private farms Keresztesi A dense growth habit makes black locust suitable for windbreaks, a use most common in China.
Black locust may even prove useful for alley cropping in temperate lraha. Researchers at the Rodale Research Center in Pennsylvania are experimenting with intercropping black locust with vegetables. Numerous reports indicate the beneficial ogaha of this NFT to associated plants through improved soil fertility.
Mixed plantings of black locust and conifers, however, can lead to reduced growth or death of the slower growing conifers because of shading and over-topping. The most serious pest to black locust in the US is the locust borer, Megacyllene robiniae Forster. There is some evidence for genetic resistance to the borer. Another insect confined to trees in the US is the locust twig borer, Ecdytolopha insiticiana Zeller.
Aphids, Nectria cankers, leaf miners, and Rimosus heart rot also affect the tree Hoffard and Anderson Its propensity to root spout aggressively can also cause problems.
Nenad Martinjak Neko pije od radosti,neko od tuge ja od jutra! Imam teren od nekih m2.