Effect of water stress on yield stability, water productivity, and canopy temperature of rice genotypes

IF 2 4区农林科学 Q2 AGRONOMY

International Agrophysics Pub Date : 2022-09-02 DOI:10.31545/intagr/151642

Zeinab Heravizadeh, Morteza Sam Daliri, M. Moballeghi, Amir Abbas Mousavi Mirkalaei

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Abstract

. A field experiment was conducted to evaluate the performance and water productivity of 15 rice genotypes under non-stress and drought-stress conditions in a warm-temperate cli - mate. This study was laid out with a randomized complete block design at two research stations (Abbasabad and Katalom, Iran). Water deficit decreased the grain yield and increased the canopy temperature in all genotypes, but the response of water productiv - ity to drought stress was not the same for the different genotypes. The maximum water productivity in non-stress and stress condi - tions (0.50 and 0.53 kg m –3 , respectively) were found in landraces. The canopy temperature was a reliable indicator for identifying drought-tolerant genotypes of rice. With each degree increase in canopy temperature, the grain yield decreased by 1 942 kg ha –1 . The biplot analysis demonstrated that landraces were the most suitable genotypes for cultivation under drought-stress and no-stress conditions. A principal component analysis based on stress tolerance indices showed that Shastak and Sahel were the most tolerant genotypes to drought stress. Overall, Shastak with a max - imum grain yield (4 595 kg ha –1 ), the highest water productivity, and savings of irrigation water by as much as 54% under condi - tions of drought stress may be introduced as a superior genotype for cultivation under water scarcity conditions and used in future breeding programmes.

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水分胁迫对水稻基因型产量稳定性、水分生产率和冠层温度的影响

在暖温带气候条件下，对15个水稻基因型在非胁迫和干旱胁迫条件下的表现和水分生产力进行了田间试验。本研究在两个研究站（Abbasabad和Katalom，伊朗）采用随机完全区组设计进行。水分亏缺降低了所有基因型的粮食产量，提高了冠层温度，但不同基因型的水分生产率对干旱胁迫的反应并不相同。在非胁迫和胁迫条件下（分别为0.50和0.53 kg m–3），陆地小种的水分生产率最高。冠层温度是鉴定水稻耐旱基因型的可靠指标。随着冠层温度的每升高一度，粮食产量减少1942kg ha–1。双位点分析表明，在干旱胁迫和无胁迫条件下，地方品种是最适合栽培的基因型。基于胁迫耐受指数的主成分分析表明，Shastak和Sahel是最能耐受干旱胁迫的基因型。总的来说，沙斯塔克具有最高的粮食产量（4955 kg ha–1）、最高的水生产力和在干旱胁迫条件下可节约54%的灌溉用水，可以作为缺水条件下栽培的优良基因型引入，并用于未来的育种计划。

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来源期刊

International Agrophysics 农林科学-农艺学

CiteScore

3.60

自引率

9.10%

发文量

审稿时长

3 months

期刊介绍： The journal is focused on the soil-plant-atmosphere system. The journal publishes original research and review papers on any subject regarding soil, plant and atmosphere and the interface in between. Manuscripts on postharvest processing and quality of crops are also welcomed. Particularly the journal is focused on the following areas: implications of agricultural land use, soil management and climate change on production of biomass and renewable energy, soil structure, cycling of carbon, water, heat and nutrients, biota, greenhouse gases and environment, soil-plant-atmosphere continuum and ways of its regulation to increase efficiency of water, energy and chemicals in agriculture, postharvest management and processing of agricultural and horticultural products in relation to food quality and safety, mathematical modeling of physical processes affecting environment quality, plant production and postharvest processing, advances in sensors and communication devices to measure and collect information about physical conditions in agricultural and natural environments. Papers accepted in the International Agrophysics should reveal substantial novelty and include thoughtful physical, biological and chemical interpretation and accurate description of the methods used. All manuscripts are initially checked on topic suitability and linguistic quality.