Sokhti berunii barg

Barg bo hamrohii poyayu navdaho uzvhoi ruizaminii rastanihoro tashkil medihad. Dar barg se ravandi baroi rastaniho nihoyat muhim  fotosintez (hosil shudani moddahoi organiki), mubodilai gazho (gazi karbonat va oksigen) va obbukhorkuni meguzarad.

Agarchande bargi rastanihoi gunogun az rui sokhti berunaashon az yakdigar farq kunand ham, onho alomathoi khose niz dorand, ki monandii onhoro nishon medihad. Bargi aksari rastaniho rangi sabz doshta, az du qism — dumcha va pahnaki barg iboratand. Dumcha bargro ba poya payvast mekunad. CHunin barghoro barghoi dumchador meguyand. Barghoi dumchador dar seb, olubolu, zarang, chinor, chormagz, zardolu va gayraho dida meshavand. Dar bargi digar rastaniho, az qabili gandum, sabr (aloe), kosni, zagir dumcha dida nameshavad. Bargi onho bo asosi pahnaki bargashon ba poya payvast buda, onhoro barghoi nishasta menomand.

Dar barghoi dumchadori baze rastaniho (masalan, nastaran) dar asosi dumcha peshbargho inkishof meyoband 46 .

Az rui shakli zohiri- ashon bargho girdshakl, dilshakl, suzanmonand, bayzavi (tukhmshakl) va gayra meshavand. Kanori pahnaki barg boshad, metavonad dandonshakl (dar seb), suzanmonand (dar larzonbed), arrashakl yo in ki suftai yaklukht (dar yosuman) boshad.

Agar dumchai barg faqat yak pahnaki barg doshta boshad, onro bargi sodda menomand. Darakhtoni zardolu, safedor, fark, chinor, tus barghoi sodda dorand .

Barghoi murakkab boshand az yakchand pahnaki barg, ki bo dumchahoi kutoh ba dumchai asosi payvastand, iboratand. CHunin bargho dar darakhti shung (yasen), gubayro, tamashk (shahtuti farangi, malina), shahtuti zamini va aqoqiyo dida meshavand. Har kadom pahnaki bargi dar bargi murakkabbuda avvalo alohida-alohida merezad va sipas dumchai asosii barg meaftad.Dar barghoi sabz bo mikdori ziyod bandchahoi guzaronanda mavhjudand, ki onhoro ragho meguyand.

Ragho ba juz guzarondani moddahoi gizoi boz ba barg mustahkami medihand.Agar ragho dar barg nisbati yakdigar mutavozi joy girifta boshand, chunin tarzi ragroni ragronii mutavozi nomida meshavad. Ragronii mutavozi beshtar dar rastanihoi yakpallagi (gandum, javdor, jav, juvorimakka, piyoz va digarho) dida meshavad .Dar barghoi kaloni zulf, guli barfak (livondar) va rastanii khonagii ahlgul (aspidistra) ragronii kamonshakl ba chashm merasad, ki in shakli ragbandi niz khosi rastanihoi yakpalla meboshad.Ragbandii turshakl baroi rastanihoi dupalla khos meboshad.

Masalan, dar bargi bulut, zardolu, seb, bunafshai seranga va gayraho raghoi barg chandin marotiba shokha ronda, shakli turshaklro megirand. CHunin makhsusiyati ragbandi nisbati rastanihoi yakpalla va dupalla na hama vaqt muvofiq meaftad. Masalan, dar rastanii zulf, ki ba dupallaho taalluq dorad, ragbandii kamoishakl va dar bargi rastanii yakpalla — chashmi zog boshad, ragbandii turshakl mushohida karda meshavad.

• Barg chi guna sokht dorad?
• Barghoi sodda az murakkab bo chi fark mekunand?
• Dar barg ragho kadom vazifaro ijro mekunand?
• Az rui ragbandiashon rastanihoi yakpallaro az dupalla chi tavr farq mekunand?