Water Regimes and Humic Acid Application Influences Potato Growth, Yield, Tuber Quality and Water Use Efficiency

AbstractThe effects of the amount and timing of regulated deficit drip irrigation under plastic film on potato (‘Qingshu 168’) growth, photosynthesis, yield, water use efficiency, and quality were examined from 2017 to 2019 in cold and arid northwestern China. In the four stages of potato growth (seedling, tuber initiation, tuber bulking, starch accumulation), eight treatments were designed, with a mild deficit was in treatments WD1 (seedling), WD2 (tuber initiation), WD3 (tuber bulking), and WD4 (starch accumulation); and a moderate deficit in WD5 (seedling), WD6 (tuber initiation), WD7 (tuber bulking), and WD8 (starch accumulation). The net photosynthetic rate, stomatal conductance, and transpiration rate decreased significantly under water deficit in the tuber formation and starch accumulation stages. Although water deficit reduced potato yields, a mild deficit in the seedling stage resulted in the highest yield and water use efficiency at 43,961.91 kg ha−1 and 8.67 kg m−3, respectively. The highest overall quality was in potatoes subjected to mild and moderate water deficit in the seedling stage. Principal component analysis identified mild water stress in the seedling stage as the optimum regulated deficit irrigation regime. The results of this study provide theoretical and technical references for efficient water-saving cultivation and industrialization of potato in northwestern China.

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Optimization of Tensiometer-Based Drip Irrigation Scheduling and Its Effect on Growth, Yield and Water Use Efficiency in Tomato (Solanum lycopersicum)

Agricultural Research ◽

10.1007/s40003-020-00529-5 ◽

2021 ◽

Author(s):

Anant Bahadur ◽

Jagdish Singh

Keyword(s):

Water Use Efficiency ◽

Solanum Lycopersicum ◽

Water Use ◽

Drip Irrigation ◽

Growth Yield ◽

Irrigation Scheduling ◽

Use Efficiency ◽

Effect On Growth

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Water Stress Effects on Growth, Yield and Water Use Efficiency of Hemarthria Compressa

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.212-213.578 ◽

2012 ◽

Vol 212-213 ◽

pp. 578-585

Author(s):

Zhong Wen Yang ◽

Jun Ying Jin ◽

Xin Yi Xu

Keyword(s):

Water Stress ◽

Water Use Efficiency ◽

Water Use ◽

Control Period ◽

Growth Yield ◽

Control Treatment ◽

Sensitive Period ◽

Total Biomass ◽

Use Efficiency ◽

Hemarthria Compressa

Water stress is an important approach to use water resources efficiently and remit the agricultural water shortage. Hemarthria compressa is one of perennial grasses, a pasture of high quality, which has abundant species resources in China. To explore the response of the growth, yield and water use efficiency(WUE) of Hemarthria compressa under water stress, this study, adapting pot experiment, imposed three water stress degree (LD, MD and SD) treatments and a control treatment on Hemarthria compressa. The data of growth indicators during control period, yield and total water consumption were obtained. The results show a noticeable inhibitory action of water stress on the growth of Hemarthria compressa. Along with the intensifying of water stress, plant height increment, leaf area, total biomass, dry matter of each organ and yield decreased, and the root-shoot ratio increased firstly and inclined to slump finally. Plants under the middle water stress treatment achieved the greatest WUE of 38.25 kg/m3. The first 10d in the water control period was the most sensitive period of the pasture responding to water stress.

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PHENOLOGY, YIELD AND WATER USE EFFICIENCY OF SUNFLOWER IN FUNCTION OF ENVIRONMENT AND NITROGEN / FENOLOGIA, RENDIMIENTO Y EFICIENCIA EN EL USO DEL AGUA EN FUNCION DEL AMBIENTE Y NITRÓGENO / PHÉNOLOGIE, RENDEMENT ET EFFICACITÉ DE L’UTILISATION DE L’EAU EN FONCTION DES ENVIRONS ET DE L’AZOTE CHEZ LE TOURNESOL

Helia ◽

10.1515/helia.2001.24.35.111 ◽

2001 ◽

Vol 24 (35) ◽

pp. 111-128

Author(s):

Víctor M. Olalde G. ◽

J. Alberto Escalante E. ◽

Angel A. Mastache L.

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Rainy Season ◽

Interactive Effect ◽

Growth Yield ◽

Growth Cycle ◽

Crop Evapotranspiration ◽

Hot Environment ◽

Crop Cycle ◽

Use Efficiency

SUMMARYDuring the rainy season of 1998, a field experiment was established in Cocula, Guerrero (hot subhumid climate, Awo) and in Montecillo, México (semiarid climate, BS1), to evaluate the effect of nitrogen (0, 10 and 20 g m-2) and environment on phenology, yield and its components, water use efficiency (WUE), and crop evapotranspiration (ETc) and heat units (HU) accumulated during the growth cycle of sunflower (Helianthus annuus L.) cv. Victoria. The crop was planted on June 1 at a density of 7.5 pl m-2 in both climates. In Cocula, maximum and minimum temperatures were more extreme and rainfall was more intense, while soil was poor in total nitrogen, compared with Montecillo. Crop growth, yield and its components, and water use efficiency were affected significantly by the environment, nitrogen and the interaction environment * nitrogen. The crop cycle in the hot environment was 36 days shorter, with a greater accumulation of HU and ETc. Yield and its components and water use efficiency were significantly higher in Cocula. Nitrogen positively affected the evaluated variables. The interactive effect of environment * nitrogen was observed clearly, since in Cocula there was response to the application of nitrogen in most of the variables evaluated, while in Montecillo there was not.

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