Effect of water stress on growth of three linseed (Linum usitatissimum L.) varieties
نویسندگان
چکیده
Linseed (Linum usitatissimum L.) is an annual oil crop that accounts for approximately 1 % of the world's oilseed supplies. It produces seeds that are rich in the health-promoting ω-3 fatty acid, α-linolenic. In Kenya, linseed is grown in the Rift Valley and Western regions, places which often experience drought. This study was aimed at evaluating the effect of water stress on growth of three linseed cultivars and to establish the extent of drought tolerance in the three cultivars. A greenhouse pot experiment in a completely randomized design was conducted at Jomo Kenyatta University of Agriculture and Technology, Kenya. The pots were well watered until the fourth week when watering was completely withheld to a half of the pots (stressed) while the other half (well watered control) was maintained at 90 % field capacity. Destructive harvesting was done when the stressed pots were at 90, 70, 60, 50, 40 % field capacities and at permanent wilting point. The experiment was replicated thrice and was repeated twice (February-May and August-November 2014). There were no significant differences in production of leaves, plant height, number of tillers and biomass between the three varieties in both seasons. Subjecting the linseed varieties to permanent wilting resulted in reduced production of leaves, growth in height, production of tillers and dry weight by 20-40 %. Decline in all growth parameters begun when 30-80 % of available soil water had been used up. There existed linear relationships between the various evaluated growth parameters. These relationships were not influenced either by the water status of soil or the varieties. Relative water content for the three linseed varieties declined after 25-67 % of available soil water had been used up.
منابع مشابه
Environmental effects on linseed (Linum usitatissimum L.) yield and growth of flax at different stand densities
The effect of environmental factors and stand density on linseed (Linum usitatissimum L.) yield was investigated by examining yield components and development rates from 4 years of field experiments carried out at Viterbo, Central Italy, in which different seed rates were tested. Spring sowings were carried out using the linseed cultivar ‘Mikael’. Growth analysis using the functional approach a...
متن کاملFatty Acid Composition, Tocopherol and Sterol Contents in Linseed (Linum usitatissimum L.) Varieties
The oil contents of linseeds were determined between 39.9% (Antares) and 43.3% (Railinus). The oleic acid contents of seed oils varied between 0.8% (Maroc) and 24.8 (Railinus). The linoleic acid contents of linseed oil change between 10.2% (Avangard) and 48.2% (Maroc), while the palmitic acid of oils ranged from 4.8% (Antares) to 6.1% (Maroc), stearic acid contents ranged between 4.7% (Ava...
متن کاملInfluence of Sulphur and Varieties on Oil Quality and Fatty Acid Composition of Linseed (linum Usitatissimum L.)
A field experiment was conducted during 2007-08 at Student Instructional Farm, Narendra Deva University of Agriculture &Technology, Kumarganj, Faizabad (U.P.), India to study the influence of different levels of sulphur and varieties of oil quality and fatty acid composition of linseed. Results revealed that significantly highest oil content (36.65%) was obtained in variety Type-397 as compared...
متن کاملEvaluation of Genetic Divergence in Indian Flax (linum Usitatissimum L.)
Flax (Linum usitatissimum L.) belongs to the genus Linum of the family Linaceae commonly known as “Alsi” and has 2n = 30 chromosomes. Linseed is one of the important rabi oilseed crops of India, cultivated in light soil under one or two irrigation in Madhya Pradesh, Chhattisgarh, Uttar Pradesh, Maharashtra, Rajasthan, West Bengal, Karnataka, Orissa and Bihar (Pali and Mehta, 2014). Chhattisgarh...
متن کاملEffect of planting pattern and fertilizer source on plant characteristics of linseed (Linum usitatissimum L.) and chickpea (Cicer arietinum L.) in intercroppung
To study the effect of fertilizer and planting pattern on chickpea and linseed plant traits in dryland farming, a field experiment was conducted in factorial layout based on randomized complete block design with three replications in Naqadeh, Iran during growing season of 2016-2017. Treatments were included six substitutive cropping patterns; sole cropping of chickpea, sole cropping of linseed,...
متن کامل