B. B. Gupta , Adarsh Kumar , D. S. Negi

Abstract

Studies on the ischolar_maining response of stem cuttings of Dalbergia sissoo in relation to the Season, age of the mother tree, position of cuttings on shoot axis and treatment with auxins, IBA, IAA and NAA and mixture of NAA + IBA. The study revealed that cuttings taken from 4 years old plants ischolar_mained better when planted in the month of August in comparison to other months. A substantial increase in the percentage of ischolar_maining occurred when treated with IBA 100 ppm in the month of August. The cuttings from younger plants ischolar_mained readily and ischolar_maining percentage fell appreciably in case of cuttings from old tree.

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T. C. Pokhriyal , S. P. Chaukiyal , H. B. Naithani , B. B. Gupta

Abstract

No abstract

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T. C. Pokhriyal , S. P. Chaukiyal , D. S. Negi , B. B. Gupta

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No abstract

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Adarsh Kumar , B. B. Gupta , Uma Singh

Abstract

The twin seedlings described is the tirst record of occurrence of polyembryony in Acacia nilotica. The twin seedlings of A. nilotica have been categorised as abnormal seedlings which were not capable of producing a normal plant in due course of time.

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Adarsh Kumar , B. B. Gupta , D. S. Negi

Abstract

The earlier study of eight months i.e., August to March (Adarsh Kumar et al., 1988) on vegetative propagation of Dendrocalamus strictus through macro-proliferation was extended by another four months i.e., April to July in order to study the growth behaviour in full one year. It has been found that sufficient number of field plantable propagules can be developed through seedling multiplication. The propagules thus produced. Planted in the field established well and showed culm formation in six months.

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T. C. Pokhriyal , H. C. S. Bhandari , D. S. Negi , S. P. Chaukiyal , B. B. Gupta

Abstract

Studies were carried out to screen twenty seven different leguminous, fast growing tree species for nodule formation and nitrogen fixation activity. The nodules add nitrogenase (acetylene reduction) activity was present in all the twelve mimosoid, four Papilionoids species and absent in all the eleven Caesalpinioid species examined under pot culture conditions.

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Adarsh Kumar , Meena Dhawan , B. B. Gupta

Abstract

About one year old culm cuttings of Bambusa tulda were treated with different auxinic and non-auxinic substances, planted in the month of November, 1986, and upischolar_mained after 180 days of planting. The cuttings treated with NAA and Coumarin as well as distilled water (Control) responded to flower development, but those treated with boric acid did not show any indication of flowering. None of the cuttings responded to ischolar_maining. However, an enhancement in the flower production was discernible under different treatments as compared to control. The August planted cuttings did not produce any flowering but ischolar_mained, sprouted, and showed rhizomegenesis as reported earlier, whereas the production of flowering in November planted culm cuttings, as well as in mother clumps showed that the entire mother clump reached the induced state spontaneously between August and November.

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Adarsh Kumar , B. B. Gupta , D. S. Negi

Abstract

Tbe propagation of Dendrocalamus strictus through seedling proliferation has been studied. It has been found that the mother stock of seedlings can be multiplied four to six times depending on fertiliser application in a period of eight months. The proliferated seedlings are easy to handle and transport as they remain small in size due to continuous rhizome separation. A methodology for multiplication of seedlings has been developed for D. strictus and is reported here.

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Adarsh Kumar , Meena Dhawan , B. B. Gupta

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Studies were conducted on vegetative propagation of Bambusa tulda by using growth promoting substance viz. Coumarin, NAA and Boric acid in 10 gm/l and 100 gm/l concentration of each along with water treated control in summer (May) and rainy (August) seasons. Summer season (May) planting of cutting was found better than rainy season (August) planting because the development of all the three essentialities i.e., sprouting, ischolar_maining and rhizome formation was recorded under all tbe treatment in May plantings.

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P. S. Rawat , B. B. Gupta , J. S. Rawat

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An experlmenl was designed to study the transpiration rale of Eucalyptus tereticornis maintained in different soil moisture levels. It was found that transpiration in this species is a function of atmospheric aridity under conlition of abundant soil moisture whereas under condition of restricted soil moisture water conserving mechanisms are in operation. Thus, the dry matter production is not seriously affetted even under conditions of low soil moisture levels.

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B. B. Gupta , D. N. Joshi

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no abstract

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H. P. Bhatnagar , B. B. Gupta , B. S. Rauthan , D. N. joshi

Abstract

Sand culture experiment was conducted on Teak (Tectona grandis) seedlings to study the mineral Nutrient requirements with respect to Nitrogen, Potassium and Phosphorus. Within the limitations of the experiment the results have indicated that for good growth, teak seedlings require about 680 mg/Plant of Nitrogen and Potassium and about 450 mg/Plant of Phosphorus. Results of the chemical analysis of the plant material have shown that higher application of Nitrogen and Phosphorus (680 mg/ Plant) increases the absorption of these minerals as well as of Calcium. and Magnesium by the plant tissues in comparison to lower (340 mg/Plant) application of Nitrogen and Phosphorus. As regards the application of Potassium the results have shown inverse correlation with respect to the absorption of Calcium. and .Magnesium by the plant tissues. Higher Potassium application (680 mg/Plant) has resulted in lower absorption of both Calcium and Magnesium. In respect of three element treatment combinations the data on ash percentage have indicated that higher Potassium application increases the ash percentage in the plant tissues.

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H. P. Bhatnagar , B. B. Gupta , B. S. Rauthan

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Pot cultare experiments were conducted to study the influence of difFerent photo-periodic treatments on the height growth of chir (Pinus roxburghii) seedlings. Significant differences were found in the height growth of seedlings among the four photoperiodic treatments, viz., long day of 18 hours, normal day of 11 to 14 hours, short day of 7 hours and intermittent day of 12 hours. Best height growth was recorded under long day treatment followed by intermittent day, then under normal day treatment and the poorest height growth was recorded under short day treatment.

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H. P. Bhatnagar , B. B. Gupta

Abstract

Pot culture experiment was conducted with Chir (Pinus roxburghii) seedlings to study the effect of photoperiod on dry matter production and mineral uptake. Significant differences in the dry weights of seedlings have been recorded among the photoperiodic treatments. Long dry treatment of 18 hours is significantly superior to other treatments; the highest amount of dry matter was produced under this treatment. As regards mineral uptake direct correlation has been observed, both in ischolar_main and shoot portions, with dry matter production.

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