composition of herbage in pinus roxburghii sargent stands: basal area and importance value index

نویسندگان

b. gupta

b. dass

چکیده

in the present study basal area and importance value index (ivi) attributes of herbage were investigated in chir pine (pinus roxburghii sargent) stands of three different ages and also in open grassland in the sub-tropical region of himachal pradesh (india) during growing season (june to september). a higher basal area of the herbage was recorded in open grassland as compared to chir pine stands of different ages. basal area of the vegetation increased gradually from july onwards and its highest values were recorded in september in all the systems. amongst the chir pine stands basal area of herbage was recorded highest in tree stand followed by pole and sapling stands. ivi and basal area values of different species revealed that only few species were major contributors to the total basal area values of the vegetation at different times. the differences in the basal area of vegetation in the four systems at a particular time and changes as recorded in the basal area with the sampling time were found to be statistically significant.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Composition of herbage in Pinus roxburghii Sargent stands: basal area and importance value index

In the present study basal area and Importance Value Index (IVI) attributes of herbage were investigated in chir pine (Pinus roxburghii Sargent) stands of three different ages and also in open grassland in the sub-tropical region of Himachal Pradesh (India) during growing season (June to September). A higher basal area of the herbage was recorded in open grassland as compared to chir pine stand...

متن کامل

Ethnobotany and phytopharmacology of Pinus roxburghii Sargent: a plant review.

Traditional medicine is a blend of information gathered over generations from various communities and cultures. Pinus roxburghii Sargent (Pinaceae) commonly known as "chir pine" is widely used in traditional and folkloric systems of medicine. The all parts of the plant are believed to possess medicinal qualities in Ayurvedic and Unani systems of medicine. In these traditional systems of medicin...

متن کامل

Fire Ecology of Ground Vegetation in Pinus roxburghii Sargent Plantations in North-West Himalaya - Floristic Composition and Species Diversity

Effect of fire on phyto-sociology of understorey vegetation in chir pine forests of three different silvological characteristics was compared with pure grassland. 15 grasses, 1 sedge, 5 legumes and 21 non-legumes were recorded in the four study sites. Floristic composition gradually increased from June to August and then declined slowly by October in all the plots. Maximum number of species wa...

متن کامل

fire ecology of ground vegetation in pinus roxburghii sargent plantations in north-west himalaya - floristic composition and species diversity

effect of fire on phyto-sociology of understorey vegetation in chir pine forests of three different silvological characteristics was compared with pure grassland. 15 grasses, 1 sedge, 5 legumes and 21 non-legumes were recorded in the four study sites. floristic composition gradually increased from june to august and then declined slowly by october in all the plots. maximum number of species was...

متن کامل

Leaf area index and canopy strati cation in Scots pine ( Pinus sylvestris L . ) stands

In order to assess the contribution of each layer to eVective leaf area index (LAI) in stratiŽ ed forest canopies, two Scots pine stands were selected in Haguenau forest, Alsace, France. One stand, 80 years old, had a sparse tree layer and a dense herb layer. The other stand, 50 years old, had a closed tree layer and dense herb and shrub layers. Hemispherical photographs, taken at 10-metre inte...

متن کامل

Volatile constituents of Pinus roxburghii from Nepal

BACKGROUND Pinus roxburghii Sarg. Is one of 3 species of pine found in Nepal, the oil of which is traditionally used to treat cuts, wounds, boils, and blisters. OBJECTIVE To obtain, analyze, and examine the anti-microbial and cytotoxic activities of the essential oils of P. roxburghii. MATERIALS AND METHODS Three plant parts (cone, needle, and bark) of Pinus roxburghii were collected in Bir...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
caspian journal of environmental sciences

ناشر: university of guilan

ISSN

دوره 5

شماره 2 2007

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023