Informatics Publishing Limited

Virendra Singh , V. K. Sah , O. P. S. Bana

Abstract

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.

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R. P. Yadav ¹, O. P. S. Bana ², R. Kaushal ³, P. R. Rajput ²

Affiliations
1 Vivekananda Parvatiya Krishi Anusandhan Sansthan, Almora-263 601, Uttarakhand, IN
2 G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, IN
3 Central Soil and Water Conservation Research & Training Institute, Dehradun-248 195, Uttarakhand, IN

Abstract

A field study was carried out to assess the effect of pruning at different height i.e. at 50, 100 and 150 cm in jatropha (Jatropha curcas Linn.) with control ( no Pruning) and fertility levels 50%, 100% and 150 per cent of recommended dose of NPK in wheat on crop growth parameters and yield in agrisilviculture system. The pruning in jatropha favoured growth parameters with varying magnitudes. The growth indices like CGR, RGR, NAR, LAR, LAI, RLGR and SLW were observed to be higher under various pruning heights than under no pruning. Magnitude of reduction varied with pruning heights and fertility levels. The relative crop growth rate in terms of NAR and LAR has been higher under pruned compared to unpruned jatropha. Grain, straw and biological yield reduced by 16.56, 12.56 and 13.85 %, respectively under jatropha in comparison to sole crop which indicate that pruning is essential for improving wheat yield under jatropha based agrisilviculture system.

Keywords

Agrisilviculture, Fertility Levels, Growth Indices, Jatropha curcas, Pruning.

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