Upper Egypt: Management of High Water Consumption Crops by Intensification

Zohry, Abd El-Hafeez; Ouda, Samiha

doi:10.1007/978-3-319-33660-2_5

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…Particularly, Hilje et al (2001) showed that cultural practices to manage whitefly can be categorized as avoidance in time or space, behavioral manipulation of the insect, host suitability, and insect removal. On the other hand, cowpea can transfer fixed N to intercropped maize during their joint growing period and this N is an important resource for maize (Abdel-Wahab et al, 2016), especially water management has become very important task to be implemented in Egypt due to the prevailing conditions of water scarcity (Zohry and Ouda, 2016). At surface irrigation, root length density of cowpea reached to soil depth 30-40 cm with lateral distances 5-10 cm and 15-20 cm.…”

Section: Introductionmentioning

confidence: 99%

Study of Productivity and Economic Evaluation of Intercropping Cowpea With Maize Under Three Irrigation Water Levels and Their Response to Insect Infestation and Viral Infection

Abdel-Wahab¹,

Abdel-Wahab²,

Shams³

et al. 2021

PLANT ARCHIVES

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The present investigation was carried out at Giza Agricultural Experiments and Research Station, Agricultural Research Center (ARC), Giza, Egypt during the two successive seasons 2016 and 2017. The objective of this investigation was to assess the effect of applied irrigation water, infestation with insects and infection with virus on cowpea and maize productivity, as well as farmer income under intercropping condition. The experiment included nine treatments which were the combinations between three applied irrigation water levels (80, 100 and 120% of the recommended applied irrigation water level of maize) and three cropping systems (intercropping cowpea with maize, sole cowpea and sole maize), in addition to recommended sole maize that grown on ridges 70 cm width and received 100% of applied irrigation water. The experimental design was a strip plot with three replications. Irrigation water treatments were randomly assigned to the vertical strips and cropping systems were allocated in the horizental strips. Data indicated that the highest applied irrigation water level (120% ETo) had higher water consumptive use than the others. The intercrops had higher water consumptive use than those of sole plantings. With respect to maize crop, increasing applied irrigation water from 80 to 120% ETo significantly increased infestation with aphids, jassids, Hawaiian beet webworm, cotton leafworm and whiteflies on maize leaves, as well as higher grain yield per ha and its attributes. Intercropped maize had higher infestation with aphids, jassids, cotton leafworm and whiteflies, as well as ear leaf area per plant than those of sole maize, meanwhile, the reverse was true for greater sugarcane borer. Intercropped maize plants that received the highest applied irrigation water (120% ETo) had higher infestation with aphids, jassids and cotton leaf worm on maize leaves than the other treatments, meanwhile higher ear leaf area per plant was recorded by application of the recommended applied irrigation water of maize (100% ETo). With respect to cowpea crop, increasing applied irrigation water from 80 to 120% ETo significantly increased infestation with aphids, jassids, leaf miner fly, Hawaiian beet webworm, cotton leafworm and whiteflies, as well as soybean mosaic virus (SMV) infection on cowpea leaves, beside higher plant height, number of branches per plant and forage yield per ha. Intercropped cowpea had lower infestation with aphids, jassids, leaf miner fly and Hawaiian beet webworm, as well as lower SMV infection and number of branches per plant and forage yield per ha than those of sole cowpea. Sole cowpea that received the recommended applied irrigation water of maize (100% ETo) had higher infestation with Hawaiian beet webworm, jassids and leaf miner fly on cowpea leaves than the other treatments, meanwhile, SMV infection was not by the interaction between applied irrigation water levels and cropping systems. Sole cowpea that received the highest applied irrigation water level (120% ETo) had a higher number of branches per ...

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Section: Introductionmentioning

confidence: 99%

Study of Productivity and Economic Evaluation of Intercropping Cowpea With Maize Under Three Irrigation Water Levels and Their Response to Insect Infestation and Viral Infection

Abdel-Wahab¹,

Abdel-Wahab²,

Shams³

et al. 2021

PLANT ARCHIVES

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“…The radiation-based models show better appropriateness than the temperature-based models in the future, as the root mean square error (RMSE) value of the former models is almost half of the latter models. The radiation-based models are recommended for use to estimate PET under climate change in the Yarlung Zangbo river basin.Atmosphere 2019, 10, 453 2 of 24 management and irrigation planning [21][22][23]. A number of models have been proposed to estimate PET and these models can be divided into four categories: (1) Temperature-based models, such as the Blaney-Criddle model [24]; (2) radiation-based models, including the Makkink model [25]; (3) mass transfer-based models, such as the Rohwer model [26]; (4) combined energy-mass balanced models, such as the Penman-Monteith (PM) model [27].…”

mentioning

confidence: 99%

“…Atmosphere 2019, 10, 453 2 of 24 management and irrigation planning [21][22][23]. A number of models have been proposed to estimate PET and these models can be divided into four categories: (1) Temperature-based models, such as the Blaney-Criddle model [24]; (2) radiation-based models, including the Makkink model [25]; (3) mass transfer-based models, such as the Rohwer model [26]; (4) combined energy-mass balanced models, such as the Penman-Monteith (PM) model [27].…”

mentioning

confidence: 99%

Appropriateness of Potential Evapotranspiration Models for Climate Change Impact Analysis in Yarlung Zangbo River Basin, China

Jian

Xuan

et al. 2019

Atmosphere

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Evapotranspiration (ET) is an important element in the water and energy cycle. Potential evapotranspiration (PET) is an important measurement of ET. Its accuracy has significant influence on agricultural water management, irrigation planning, and hydrological modelling. However, whether current PET models are applicable under climate change or not, is still a question. In this study, five frequently used PET models were chosen, including one combination model (the FAO Penman-Monteith model, FAO-PM), two temperature-based models (the Blaney-Criddle and the Hargreaves models) and two radiation-based models (the Makkink and the Priestley-Taylor models), to estimate their appropriateness in the historical and future periods under climate change impact on the Yarlung Zangbo river basin, China. Bias correction methods were not only applied to the temperature output of Global Climate Models (GCMs), but also for radiation, humidity, and wind speed. It was demonstrated that the results from the Blaney-Criddle and Makkink models provided better agreement with the PET obtained by the FAO-PM model in the historical period. In the future period, monthly PET estimated by all five models show positive trends. The changes of PET under RCP8.5 are much higher than under RCP2.6. The radiation-based models show better appropriateness than the temperature-based models in the future, as the root mean square error (RMSE) value of the former models is almost half of the latter models. The radiation-based models are recommended for use to estimate PET under climate change in the Yarlung Zangbo river basin.Atmosphere 2019, 10, 453 2 of 24 management and irrigation planning [21][22][23]. A number of models have been proposed to estimate PET and these models can be divided into four categories: (1) Temperature-based models, such as the Blaney-Criddle model [24]; (2) radiation-based models, including the Makkink model [25]; (3) mass transfer-based models, such as the Rohwer model [26]; (4) combined energy-mass balanced models, such as the Penman-Monteith (PM) model [27]. The PM model is used widely and has been commonly adopted as a reference, owing to the fact that it is a physical-based model and combines both energy and mass balances [28][29][30]. Correspondingly, its requirement of climate variables data is much stricter than other models, including relative humidity and wind speed [27]. These climate data may not be available in many regions or even may not be measured at all. Thus, models with less data demand were developed, such as models from categories 2 and 3. These simple models only need temperature data or solar radiation data [31][32][33]. However, they were proposed under specific climate conditions, which may have impact on their applicability for various conditions. Therefore, understanding the behavior of these models has been a major concern.Many studies have compared the performance of different PET models under various regions and under different climate conditions for historical periods [19,[31][32][33][34][35]. Xu and...

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“…The present study was conducted at experimental sheep farm of animal production department, Faculty of Agriculture, Sohag University, Egypt from December 2018 to April 2019. Sohag is one of the rural governorates in Upper Egypt (latitude 26.36°, longitude 31.38° and elevation above sea level 68.70 m), characterized by a dry desert climate ( Zohry and Ouda, 2016 ). Sohagi sheep breed is characterized by breeding throughout the year.…”

Section: Methodsmentioning

confidence: 99%

Effect of pre-pubertal growth rate of Sohagi ram lambs on some physiological parameters and sexual behavioral patterns at puberty

2021

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Thirty healthy Sohagi ram lambs with an average age of 188.6±7.3 days were used to study the effect of pre-pubertal growth rate on some physiological parameters and sexual behavioral patterns at puberty. Ram lambs were divided into three groups (10 animals per each group) according to the previous growth rate until 6 months of age. Groups were marked as fast, medium and slow growing. Animal groups were housed in closed barns with access to an open area. Results showed that age and weight of ram lambs at puberty were significantly affected (P<0.05) by the pre-pubertal growth rate. Ram lambs in the fast growing group were reached to onset puberty firstly at 272.6 days with body weight (BW) 37.1 kg on average then ram lambs in medium group (284.8 days with BW 32.7 kg), while ram lambs in slow growing group were the last (314.1 days with BW 32.5 kg). Blood‎ testosterone‎ concentration at puberty was not significantly different among growing groups (1.494± 0.03 ng/ml on average, ranged from 1.287 to 1.902 ng/ml). Testes measurements from 6 months of age until puberty show that ram lambs in fast growing group had the highest values of testes length, circumference and volume followed by those in medium and slow growing group. Sexual behavioral observation showed that flehmen and mounting behavior were significantly higher for ram lambs in fast growing group (5.63 and 6.75 number/12h) than slow growing group (4.25 and 5.38 number/12h) while in medium growing group were intermediate (4.88 and 5.88 number/12h). From these findings, could be concluded that age, weight and sexual behavioral patterns of Sohagi ram lambs at puberty were affected by pre-pubertal growth rate, and the breeders should strive to achieve good growth rates for their lambs before puberty which led to improving reproductive performance.

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Upper Egypt: Management of High Water Consumption Crops by Intensification

Cited by 8 publications

References 7 publications

Study of Productivity and Economic Evaluation of Intercropping Cowpea With Maize Under Three Irrigation Water Levels and Their Response to Insect Infestation and Viral Infection

Study of Productivity and Economic Evaluation of Intercropping Cowpea With Maize Under Three Irrigation Water Levels and Their Response to Insect Infestation and Viral Infection

Appropriateness of Potential Evapotranspiration Models for Climate Change Impact Analysis in Yarlung Zangbo River Basin, China

Effect of pre-pubertal growth rate of Sohagi ram lambs on some physiological parameters and sexual behavioral patterns at puberty

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