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Sah, V. K.
- Studies on the Effect of Date of Fruit Collection on Seed Germination and Early Seedling Growth in Himalayan Ash (Fraxinus micrantha Lingelsh)
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Indian Forester, Vol 131, No 1 (2005), Pagination: 31-36Abstract
The present study was conducted to find out the optimum time of seed (fruit) collection in Fraxinus micrantha. The fruits were collected at fortnightly interval. The results of the present study revealed that the maximum germination of 44.50 per cent was found in treatment T3 (15th October collection or 180 days after anthesis) at a time when the fruit colour changed from green to grey orange. The moisture and dry weight/l00 seed at this stage was 17.82 per cent and 1.40 g, respectively. The shoot length, ischolar_main length, shoot dry weight and ischolar_main dry weight of 45 days old seedlings were also found better in this treatment. Therefore, the seeds of this species should be collected in the second fortnight of October (180 days after anthesis) at a time when the fruit colour changed to grey orange for better germination, seedling growth and vigour index.
- Effect of Root Pruning on Survival and Early Seedling Growth of Banj Oak (Quercus leucotrichophora, A. Camus) in out Planting
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Indian Forester, Vol 129, No 11 (2003), Pagination: 1344-1348Abstract
An experiment was undertaken to find out the effect of ischolar_main pruning on the survival and early growth of Banj oak (Quercus leucotrichophora A. Camus) in out planting. Different treatments revealed that maximum collar diameter and height increment, survival percentage and mean collar diameter and height annual increment were obtained in treatment T2 where ischolar_mains were pruned to 20 cm. However, light ischolar_main pruning to a length of 15 cm did not affect the height growth of plants adversely but severe ischolar_main pruning had significant neg.ative effect on plant growth. The results indicated that ischolar_mains might be pruned to 20 cm length not only to get the better height growth and survival, though statistically non-significant, but also ease in out planting.- The Emerging Problems and Possible Solutions of forest Ecosystems of Garhwal Himalayas
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Indian Forester, Vol 128, No 11 (2002), Pagination: 1195-1208Abstract
The present paper deals with the problems of land use pattern, regeneration potential of major forests, causes of forest degradation, biotic pressures on the existing grazing lands and pastures and the threat imposed by soil erosion and their likely solutions in the forest ecosystems of the Garhwal Himalayas. The land should be allocated according to the land capability classes. The ischolar_main cause of forest degradation is over-exploitation of forest resources and the encroachment and indiscriminate road and hydroelectric darn construction in the fragile forest ecosystem. The condition of existing grazing lands and pastures is poor due to continuous over-grazing. Introduction of improved grasses and legumes, use of fertilizers and proper grazing management practices need to be adopted. Improvement of these forest ecosystems through afforestation, adoption or-proper soil and water conservation measures and forest management techniques are required to be undertaken.- Effect of Cone Diameter on Seed Yield, Moisture Content and Germination in Himalayan Blue Pine (Pinus wallichiana A.B. Jacks)
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Indian Forester, Vol 122, No 2 (1996), Pagination: 150-154Abstract
The present study was aimed at, to find out the effect of different cone diameter classes (Small - < 3.0 cm; medium, 3.0 - 3.5 cm; and large - > 3.5 cm) on various parameters. The medium size cones exhibited higher germination followed by large size and small size cones in the laboratory as well as in the nursery. The large size cones were found superior in terms offresh weight of cones, quantity of seed extracted, fresh and dry weight of seeds and moisture content, respectively. However, the maximum per cent seed yield was obtained from the medium size cones. The number of cones required to get unit quantity of seed decreased as the diameter of cones increased. Therefore, it may be recommended that medium size cone be preferred for seed collection in order to obtain maximum germination in blue pine.- Effect of Temperature and Storage on Seed Germination in Populus ciliata Wall. Ex Royle in Garhwal Himalaya
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Indian Forester, Vol 121, No 4 (1995), Pagination: 273-275Abstract
°The study was undertaken to find out the effect of temperature and storage of P. ciliata seeds. The results indicated that the maximum germination was obtained at 20°C. The seeds stored at +2°C retained better viability (60.5%) than the seeds stored at -10°C (30.0%) after one year of storage period.- Effect of Crown Position on Cone, Seed and Germination Characteristics in Himalayan Cedar
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Indian Forester, Vol 139, No 2 (2013), Pagination: 155-159Abstract
The results of the study revealed that the cone length (11.54 cm), cone diameter (6.10 cm), number of fertile scales/cone (246.96), total number of scales/cone (282.28), number of seeds/cone (472.27) and weight of seeds/cone (71.50 g) were highest for the cones which were collected from upper crown. The seed length (15.45 mm), width (5.01 mm), thickness (3.50 mm), fresh (15.04 g) and dry weight of 100 seed (11.72 g) were also found maximum of those seeds which were extracted from the cones collected from upper crown. The maximum germination (64.00 %) was obtained from the seeds extracted from the cones collected from upper crown under laboratory condition and was significantly higher than the germination of seeds from middle crown and lower crown. The results of germination in nursery revealed almost the same trend but the values of different parameters were less than the values obtained under controlled conditions.Keywords
Crown position, Cone length, Seed length, Seed width, Seed germination- Effect of Crown Position on Cone, Seed and Germination Characteristics in Blue Pine (Pinus wallichiana, A.B. Jacks)
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Affiliations
1 Department of Forestry, College of Forestry and Hill Agriculture, Ranichauri – 249 199, Tehri Garhwal (Uttarakhand), IN
1 Department of Forestry, College of Forestry and Hill Agriculture, Ranichauri – 249 199, Tehri Garhwal (Uttarakhand), IN
Source
Indian Forester, Vol 141, No 6 (2015), Pagination: 615-620Abstract
Effect of crown position study revealed that the cone length (22.14 cm), cone diameter (2.88 cm), number of fertile scales/cone (130.02), total number of scales/cone (141.58), number of seeds/cone (254.04) and weight of seeds/cone (13.04 g) were highest for the cones which were collected from middle crown. The seed length (11.80 mm), width (5.02 mm), thickness (2.99 mm), fresh (5.35 g) and dry weight of 100 seed (4.07 g) were also found maximum of seeds from middle crown. Seed germination was also maximum (68.25 %) from middle crown cones under laboratory condition and was significantly higher than the germination of seeds of lower crown. The germination value differed significantly only with the germination value of seed of lower crown but germination value and speed of germination differed significantly with lowerand upper crown. The maximum germination, germination value, germination index and speed of germination under nursery condition were obtained from the seeds of middle crown but the value of these parameters was less than the values obtained under controlled conditions. The collar diameter and shoot length obtained from the seed collected from middle crown showed a significant difference with the collar diameter and shoot length of lower crown position. However, the seedling dry weight from middle crown differed significantly from upper as well as lower crown position.Keywords
Crown Position, Cone Length, Seed Length, Seed Width, Seed Germination, Seedling Length and Dry Weight.- Soil Organic Carbon Pools under Terminalia chebula Retz. based Agroforestry Systemin Himalayan Foothills, Indiax
Abstract Views :246 |
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Authors
Amit Kumar
1,
G. K. Dwivedi
1,
Salil Tewari
1,
Jaipaul
1,
V. K. Sah
1,
Hukum Singh
2,
Parmanand Kumar
2,
Narendra Kumar
2,
Rajesh Kaushal
3
Affiliations
1 Agroforestry Section, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar, U.S. Nagar 243 145, IN
2 Forest Ecology and Climate Change Division, Forest Research Institute, Dehradun 248 006, IN
3 ICAR-Indian Institute of Soil and Water Conservation, Dehradun 248 001, IN
1 Agroforestry Section, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar, U.S. Nagar 243 145, IN
2 Forest Ecology and Climate Change Division, Forest Research Institute, Dehradun 248 006, IN
3 ICAR-Indian Institute of Soil and Water Conservation, Dehradun 248 001, IN
Source
Current Science, Vol 118, No 7 (2020), Pagination: 1098-1103Abstract
Knowledge of carbon (C) pools in soils is helpful in devising practices for efficient carbon management in intensive cropping systems. Carbon fractions of soil organic carbon are used asan indicator for land-use induced change in soil quality. The present study evaluated carbon pools under Terminalia chebula(chebulic myrobalan) based agroforestry system supplied with different nutrient sources, viz. farmyard manure, poultry manure, vermicompost, wheat straw and inorganic fertilizer (NPK @ 100:80:60). Carbon fractions, viz. very labile (C1 frac), labile (C2 frac), less labile (C3 frac) and non-labile (C4 frac), were analysed at 0–15 and 15–30 cm soil depth. The higher value of C1 frac (13.8%), C2 frac (4.8%), C3 frac (8.3%) and C4 frac(11.1%) were recorded under agroforestry as compared to open system. Among the nutrient sources, all the carbon fractions were higher under 100% integrated nutrient sources as compared to controlled treatment. Microbial biomass carbon (MBC) was recorded higher (298.31 μg g–1 ) under agroforestry system compared to the open system (290.63 μg g–1 ) at 0–15 cm. Among the different nutrient sources, higher MBC (458.66 μg g–1 ) at 0–15 cm and lower (340.59 μg g–1 ) at 15–30 cm soil depth was recorded in 100% integrated treatment.Thus, agroforestry-based land-use types and integrated nutrient management are more efficient for soil health and carbon management in Himalayan foothills.Keywords
Active Pool, Carbon Fractions, Labile, Nonlabile, Nutrient Sources, Passive Pool.Full Text
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