Analysis and Modelling of the Effects of Water Stress on Maize Growth and Yield in Dryland Conditions

Risks of yield loss due to variation in optimum density for different maize genotypes under variable environmental conditions

“…On the other hand, late maturing hybrids seem to be almost twice as risky as the quick or medium maturing types (Figure a), suggesting quick maturing hybrids such as P38F70 can be the best option for environments like Emerald in most of the years. Earlier studies using simulations suggested that quick maturing hybrids can be better options in terms of minimizing risks for sites like Emerald (Birch et al., ; Song, Birch, Qu, Dohert, & Hanan, ). Previous similar studies also indicated that quick maturing hybrids are better choice for less favourable environments (Berzsenyi & Tokatlidis, ; Blumenthal, Lyon, & Stroup, ; Norwood, ; Shanahan, Doerge, Johnson, & Vigil, ).…”

Effect of water-saving irrigation regime on whole-plant yield and nutritive value of maize hybrids

“…The effect of water shortage on yield performance and physiological metabolism of maize has been widely studied considering the whole‐plant or grain yields . Although different secondary traits, such as morphological (i.e. number of ears per plant, number of rows per ear and number of seeds, seed weight, leaf area index, root biomass) and physiological (i.e.…”

“…However, water is a concern as many researchers warn about global climate change, which might lead to an increase of the average temperature and land being exposed to water shortage . Thus the availability of water for irrigation could become limited because of competition among agricultural, urban, industrial and environmental demands or unplanned events . In addition, possible changes toward adaptive water management imposed by public water resource stakeholders could worsen the situation because of delay, unavailability or increased price of irrigation water, particularly when timed in critical phases of plant growing.…”

“…Specifically, maize is generally considered more susceptible to water restriction during reproductive than in vegetative stage, even if contrasting data are reported in the literature . The flowering period seems to be the most critical phase to water management failure because of the important plant morphological changes that occur, such as silk growth, pollination and kernel formation . Musick and Dusek reported a drastic yield drop when water was reduced at tasseling and silking.…”

Evaluation of drought tolerance in corn (Zea mays L.) new hybrids with using stress tolerance indices

“…According to the FAO reports (2008) in Iran (annual rainfall 24mm), the production of maize was estimated 2.8 percent of total cereals production and 1.6 million tons grain yield from 0.25 million hectare of arable and cultivated lands, however hybrid grain production is extremely low (Moradi Dezfuli et al, 2008). Corn has been being cultivated and grown around the world and drought pressure was classified as one of the most deleterious environmental stresses which restrict crop production Khodarahmpour, 2011;Oraki et al, 2011;Song et al, 2010;Sinaki et al, 2007) and 20-25 percent of the planting area of maize is affected by drought pressure in the world (Golbashy et al, 2010). Corn is used as food and feed for livestock and meets the requirements of material in different industries such as food, medicine and textile and security of food in the world relies on growth and development of plants which are highly tolerate to abiotic stresses particularly drought (Ali et al, 2011).…”