B. Gupta , N. S. Thakur , B. Dass

Abstract

No abstract

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B. Gupta , R. Singh , Ramesh K. Verma

Abstract

In the present paper, biomass fluctuations following grazing were studied. The plant biomass varied from month to month and season to season in controlled and grazedsite. The abovepground (live) biomass attained its peak value in the months of August/September during both the year with its maximum values as 264.88 g/m² and 368.08 g/m² on Site I (exclosure) and 157.28 g/m² and 124.84 g/m² on Site II (grazed) during the first and the second years respectively. Seasonally, aboveground (live) biomass was maximum in rainy season followed by summer and winter season. Belowground biomass was found maximum in winter season followed by rainy and summer seasons. Standing dead and litter biomass was recorded maximum in summer season followed by winter and rainy seasons. Grazing decreased the production in different plant compartments throughout the study period. Among different plants, grasses were found to be the major contributors to the community biomass. Sedges, legumes and non-legumes contribution was mainly limited to rainy season. Variety ratio was found highest in rainy season followed by summer and winter seasons. Root:shoot ratio was higher in winter seasons. Both variety ratio and ischolar_main:shoot ratios were higher in Site II as compared to Site I in different months throughout the study period.

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B. Gupta ¹, R. K. Sahu ¹

Affiliations
1 Department of Silviculture and Agroforestry, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan, H.P.-173 230, IN

Abstract

In the present study a quick method termed as 'Height Intercept Method' is used to determine site quality of any chir pine forests/stands. The study was conducted in Solan district of Himachal Pradesh (India) selecting eight chir pine sites viz., Oachghat, Sultanpur, Barog, Shilli, Bauhli, Kandaghat, Subathu and Dharampur) Height and Height Intercepts i.e. 3, 4, 5, 6 and 7^th year mean internodal length for 19 years old trees were measured from breast height. Relationships between mean internodal lengths (height intercept) and height of trees were developed using linear, curvilinear, log linear and log curvilinear models. The results revealed that 6 years height intercept was reliable estimate to express the relationship between height of tree and height intercept of 19 years old chir pine stands and thereby the site quality. The best relationship between height and height intercept was: Height = 3.0493 + 0.1419 Height Intercept + 0.0007 Height Intercept² . Height intercept varied from 30 to 70 cm. Chir pine in Dharampur site exhibited lowest height intercept thus expressing poor site quality whereas, chir pine in Oachghat was maximum height intercept thereby good site quality. The site quality as estimated by height intercept method were compared with standard site qualities given by Forest Research Institute of India (F.R.I.) for chir pine stands/forests and it was found that good site quality of present study was equivalent to site quality I/II and poor site quality equaled site quality III of F.R.I.

Keywords

Chir Pine, Height Intercept, Internodal Length.

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