Crop Water Stress Index for Devising Water Efficient Irrigation Schedules for Wheat Crop

Yadav, Abhishek; Upreti, Hitesh; Singhal, Gopal Das; Sharma, Jyoti

doi:10.1061/9780784484852.042

Cited by 1 publication

(2 citation statements)

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“…The minimum CATD in the year 2014-15 and 2015-16 was found in non-stressed treatment (T8), respectively as -9.6 and -8.9 °C and it was maximum at 3.0 and 3.2 °C, respectively in non-irrigated treatment (T9). It indicates that the Tc in T8 was cooler than the T9 due to the higher frequency of irrigation (supported by Yuan et al, 2004;Mahan et al, 2005;Yadav et al, 2023). It can be seen (Figure 5) that during the growing season of both years, as the irrigation was applied to the wheat crop, the CATD fell down and as days passed it rose which indicates the effect of irrigation on canopy temperature.…”

Section: Irrigation Scheduling Of Wheat Crop Based On Catdmentioning

confidence: 92%

“…Addressing the challenges of efficient water utilization in agriculture is crucial to meeting the growing demands for food production (Yadav et al, 2023). In these challenging conditions, agricultural scientists should take the initiative in food security including cereals, pulses, oil seeds, vegetables, fruits, and many other agricultural products 2023).…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Wheat (Triticum aestivum L.) Crop Yield and Water Use Efficiency: A Study on Canopy Air Temperature Difference-Based Drip Irrigation Scheduling in a Semi-Arid Region of Western India

Patel,

Rank,

Vekariya

et al. 2023

Preprint

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This study addresses efficient water usage in wheat cultivation in a semi-arid region of India with clay loam soil and an increasing water supply-demand gap. It focuses on optimizing drip irrigation (DI) scheduling, of wheat crops, based on canopy air temperature difference (CATD) using the crop water stress index (CWSI). The field experiments were conducted for two winter seasons, employing high-discharge drip irrigation (DI) on wheat crop (variety - GW 366) at Junagadh Agricultural University (JAU), Gujarat, India. The experiment had nine treatments, each replicated three times in randomized blocks. The DI treatments labeled as T1 to T6, were irrigated at CATD values of -4, -3, -2, -1, 0, and 1 °C, respectively.. While T7 were irrigated by border irrigation. In order to define upper and lower baselines of CWSI, well watered treatments (T8) and extreme dry treatment (T9) DI were considered. The drip irrigation system (DIS) had an application rate of 7.78 mm/h with a uniformity coefficient of 90.40%. Compared to surface irrigation, DI resulted in water savings ranging from 3.52% (T1) to 43.24% (T6). Using real-time CATD data, the theoretical CWSI (CWSITh) and the vapor pressure deficit (VPD) based semi-empirical CWSI (CWSIVPD) were calculated as 0.3351 and 0.3668, respectively. CATD values showed significant variation in CWSI across treatments. The CWSI demonstrated sensitivity to water stress during critical growth stages. The study identified an optimal CATD of -1 °C, yielding 36.48% higher crop yield (4744 kg/ha), 30.23% water savings (388.42 mm), and notable 95.67% more water use efficiency (12.21 kg/ha-mm,), surpassing the outcomes of border irrigation (3476 kg/ha, 556.74 mm and 6.24 kg/ha-mm). These findings hold significant implications for farmers and policymakers, effectively addressing food and water security concerns. The study underscores the efficiency of DI combined with CATD-based irrigation scheduling in optimizing wheat crop performance. In the context of critical water management, this research provides essential insights for sustainable agricultural practices.

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Section: Irrigation Scheduling Of Wheat Crop Based On Catdmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%