Gafs shudani poya – Hosil shudani solhalqa

Ba tufayli boavj taqsim shudani hujayrahoi kambiy tanai (poyai) buttavu darakhton va poyai giyohhoi bisyorsola gafs meshavad. Buluthoi “kukhansolu” azimjussae malumand, ki davrodavri tanai onho ba 10 m merasad. YO in ki kundai yak evkalipti pir chunon gafs bud, ki dar rui on maydonchai raqs sokhta shudaast.

Poya dar ruzhoi fasli garmi sol dar natijai taqsim shudani hujayrahoi nafisi kambiy gafs meshavad. Dar natijai taqsimsha- vii boavji kambiy hujayrahoi nav ba navi lif va chub ba vujud ovarda meshavand. Vale hujayrahoi tarafi chub nazar ba hujayrahoi lif khele ziyod hosil meshavand.

Okhirhoi tiramoh davrai oromii kambiy ogoz meyobad. Bahor, bo ogozi jarayoni shiradav, hujayrahoi kambiy ba taqsimshavi sar mekunand. Dar natijai chunin taqsimshavii (dar fasli bahor) hujayrahoi kambiy dar chub raghoi surokhashon vase, ki pardai nisbatan nafis dorand, tashakkul meyoband. Tiramoh surokhii raghoi navi chubi aksar darakhton tang, pardaashon gafstar meshavad.

Tamomi qabati hujayrahoi chub, ki dar davomi yak mavsimi nashvi (bahor, tobiston va tiramoh) hosil shudaand, solhalqai sabzish (rushd)-ro ba vujud meovarand.

Hujayrahoi maydai tiramohi az hujayrahoi kaloni bahorii chubi soli minbada, ki bo hamdigar hamshafatand, farq mekunand. Bi- nobar on, haddi bayni solhalqai solhoi gunogun dar bisyor darakhton nagz ayon meshavad.

Bo purbini dasti adadi solhalqahoro shumurda, sinnu soli darakhtu shokhahoi arrashudaro muayyan kardan mumkin ast. Masalan, baze darakhtoni alohidai bulut to 1000 sol mesabzand. Inchunin didan mumkin ast, ki gafsii solhalqaho gunogun ast, khususan solhalqahoi boriku pahn farq karda meshavand. Solhalqahoi nisbatan pahn (yo vasetar) dar solhoi sharoiti iqlimashon bagoyat musoid, hosil mesha- vand. Dar solhoi nisbatan nomusoidi iqlim (dar solhoi khunuk, khushksoli) solhalqa borik meshavad. Binobar on, az rui solhalqaho sharoithoi iklimii solhoi duri guzashtaro muayyan kardan mumkin ast. Baroi in sinnu soli darakhtro donistan lozim ast.

Az rui solhalqaho chun qutbnamo (kompas) samti ufuqro muayyan kardan mumkin ast. Solhalqahoi tarafi janubi darakht nazar ba samti shimolash odatan vase meshavand. Zero tarafi shimol chun sharoiti nomusoid ba kambiy tasir mekunad va hujayrahoi on sust taqsim meshavand. Az in ru, solhalqai tarafi shimol borik- tar meshavad.

1. Poya chi tavr gafs meshavad?
2. Kambiy dar kujo joygir ast va chi ahamiyat dorad?
3. Solhalqa chist?
4. Az rui solhalqa chiro muayyan kardan mumkin ast?
5. Sinnu soli darakhtro chi tavr muayyan kardan mumkin ast?