Informatics Publishing Limited

Mohd. Aslam ¹

Affiliations
1 Seed Development Division, State Forest Research Institute Shiekhbagh Forest Complex, Srinagar, Kashmir-190001 (Jammu and Kashmir), India.

Abstract

Large scale exploitation coupled with dysgenic selection of ecologically and commercially important Pinus wallichiana (blue pine) though has eroded its gene pool but it still exhibits wide variability which could be utilized for its genetic improvement. It is in this context that eighty eight plus trees from the entire distributional range of blue pine in Kashmir Himalaya were selected on the basis of desirable traits. One year old half-sib progenies of these plus trees were evaluated under nursery conditions for six traits. Genetic coefficient of variation, heritability and genetic advance showed that a large portion of phenotypic variability was genetic and highly heritable, particularly in respect of collar diameter, seedling height, needle diameter and seedling survival. High heritability estimates were associated with high genetic gain for collar diameter and seedling height suggesting additive gene control of the inheritance of these traits. Plus tree number 15 located at Arthnari in forest compartment no. 38/L of Lidder forest division was outstanding in respect of most of the growth characteristics and could be used as the source genetic stock for large scale production of quality planting material (QPM) required in afforestation and reforestation programmes of the species.

Keywords

Plus Trees, Genetic Variation, Character Association, Blue Pine, Pinus Wallichiana

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V. K. Verma ¹, Sanjai Chaudhry ¹, Vishram Singh ¹, A. K. Srivastava ¹, Mohd. Aslam ¹, Sohanveer Singh ¹

Affiliations
1 Department of Agronomy, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur (U.P.), IN

Abstract

A field experiment was conducted during Rabi season of 2010-11 at Students' Instructional Farm of C.S Azad University of Agriculture and Technology, Kanpur. six crop biomass viz., mustard, field pea, sorghum, maize, rice and wheat straws were incorporated in soil before sowing and their allelopathic potential was compared with weed free and unweeded treatments and analysed on germination and growth of weeds in wheat crop. The crop growth parameters, yield attributes, yield and economics of wheat were also computed. The results obtained shown that mustard straw, sorghum straw and maize straw were more effective to suppress weed germination and growth. The application of mustard straw before sowing registered maximum grain yield of wheat (42.0 q/ha) followed by sorghum straw (41.33 q/ha), maize straw (40.66 q/ha), field pea straw (38.75 q/ha), wheat straw (35.83 q/ha), paddy straw (35.66 q/ha) and minimum grain yield (33.58 q/ha) was noticed in unweeded control treatment. The incorporation of mustard straw, sorghum straw and maize straw registered 25.07 per cent, 23.03 per cent and 21.08 per cent, respectively more grain yield than unweeded control treatment. Allowing weed growth though out crop growth period in unweeded control treatment caused on an average 31.26 per cent reduction in grain yield of wheat i.e. 44.08 q/ha of wheat variety UP 2338 in control in plain zone of Uttar Pradesh.

Keywords

Allelopathic, Crop Biomass, Weeds, Wheat.

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