Rashid Kazmi - Academia.edu (original) (raw)
Papers by Rashid Kazmi
Acta Agronomica Hungarica, 2003
The investigation was concerned with the effects of water stress on the yield and yield component... more The investigation was concerned with the effects of water stress on the yield and yield components of wheat grown under rainfed conditions in Rawalakot, Pakistan. A pot experiment was conducted with four wheat genotypes, Inqlab-91, Chakwal-97, Rawal-87 and Kohsar-95, tested against five irrigation levels with drought imposed at different growth stages including control, terminal drought, post-anthesis drought, three irrigations and pre-anthesis drought. The parameters studied were flag leaf area, ear stalk length, number of grains per spike and grain yield per pot. Flag leaf area and ear stalk length exhibited a significant reduction of 14 and 36%, respectively, when wheat was subjected to water stress. The proportional reduction in yield was 40% with three irrigations and 98% in the case of pre-anthesis drought depending upon the extent and degree of stress. Results showed that wheat could withstand and tolerate drought only up to anthesis, after which water stress resulted in the complete failure of the crop. It could be deduced that the critical stage for moisture in wheat started 60 days after germination, and became more severe at 90 days, i.e. at the anthesis stage. Among the genotypes, Inqlab-91 was found to be more tolerant of drought and could thus be a good option for further testing and recommendation for rainfed areas.
Archives of Agronomy and Soil Science, 2003
Water stress is a major constraint for agricultural production in arid and semi-arid regions of t... more Water stress is a major constraint for agricultural production in arid and semi-arid regions of the world where wheat serves as a principal food crop for human consumption. An experiment was designed to examine the potential and stability of wheat in response to water stress and to determine the critical stage of wheat for irrigation. Four wheat genotypes, Inqlab-91, Chakwal-97, Rawal-87 and Kohsar-95 were tested against five irrigation levels imposed at different growth stages including control (no stress), terminal drought, pre-anthesis drought, three-irrigations, and post-anthesis drought. Genotypes differed in their response to water stress at almost all stages of plant growth. Plant height, fresh plant biomass and number of leaves decreased significantly depending upon the extent and degree of water stress. Water stressed plants exhibited deeper root system relative to those grown under well-watered conditions. Highly positive correlation (r = 0.89) between fresh biomass yield and relative water content (RWC) indicated RWC as a causative factor enhancing growth of wheat under drought conditions. Results depicted that wheat can tolerate water stress in early stages of its development but at anthesis and grain filling stage water shortage severely damaged the crop. There were significant genotype 6 environment interactions for plant height, root length and RWC. Among genotypes, Inqlab-91, Chakwal-97 and Rawal-87 depicted stability in almost all the water stress levels and thus provide good option for further testing and recommendation for the rain-fed areas.
Acta Agronomica Hungarica, 2003
The investigation was concerned with the effects of water stress on the yield and yield component... more The investigation was concerned with the effects of water stress on the yield and yield components of wheat grown under rainfed conditions in Rawalakot, Pakistan. A pot experiment was conducted with four wheat genotypes, Inqlab-91, Chakwal-97, Rawal-87 and Kohsar-95, tested against five irrigation levels with drought imposed at different growth stages including control, terminal drought, post-anthesis drought, three irrigations and pre-anthesis drought. The parameters studied were flag leaf area, ear stalk length, number of grains per spike and grain yield per pot. Flag leaf area and ear stalk length exhibited a significant reduction of 14 and 36%, respectively, when wheat was subjected to water stress. The proportional reduction in yield was 40% with three irrigations and 98% in the case of pre-anthesis drought depending upon the extent and degree of stress. Results showed that wheat could withstand and tolerate drought only up to anthesis, after which water stress resulted in the complete failure of the crop. It could be deduced that the critical stage for moisture in wheat started 60 days after germination, and became more severe at 90 days, i.e. at the anthesis stage. Among the genotypes, Inqlab-91 was found to be more tolerant of drought and could thus be a good option for further testing and recommendation for rainfed areas.
Archives of Agronomy and Soil Science, 2003
Water stress is a major constraint for agricultural production in arid and semi-arid regions of t... more Water stress is a major constraint for agricultural production in arid and semi-arid regions of the world where wheat serves as a principal food crop for human consumption. An experiment was designed to examine the potential and stability of wheat in response to water stress and to determine the critical stage of wheat for irrigation. Four wheat genotypes, Inqlab-91, Chakwal-97, Rawal-87 and Kohsar-95 were tested against five irrigation levels imposed at different growth stages including control (no stress), terminal drought, pre-anthesis drought, three-irrigations, and post-anthesis drought. Genotypes differed in their response to water stress at almost all stages of plant growth. Plant height, fresh plant biomass and number of leaves decreased significantly depending upon the extent and degree of water stress. Water stressed plants exhibited deeper root system relative to those grown under well-watered conditions. Highly positive correlation (r = 0.89) between fresh biomass yield and relative water content (RWC) indicated RWC as a causative factor enhancing growth of wheat under drought conditions. Results depicted that wheat can tolerate water stress in early stages of its development but at anthesis and grain filling stage water shortage severely damaged the crop. There were significant genotype 6 environment interactions for plant height, root length and RWC. Among genotypes, Inqlab-91, Chakwal-97 and Rawal-87 depicted stability in almost all the water stress levels and thus provide good option for further testing and recommendation for the rain-fed areas.