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The response of three durum wheat cultivars (C: Chen’s, V: Vitron, W: Waha) to irrigation was studied during 4 years in semi-arid
Algeria (Chlef). The four treatments were NI (unirrigated), EI (early irrigation, up to heading), LI (late irrigation, from
heading) and FI (full irrigation, over the entire season). FI increased rainfed grain yield (1,300 kg ha−1) by 270%, EI by 107%, and LI by 67%. The variety × irrigation interaction was significant each year. Under irrigation, cv.
Vitron was generally the most productive cultivar while in rainfed conditions cv. Waha always resulted in the highest grain
yield. Grain yield increased exponentially with seasonal evapotranspiration (r
2 = 0.741) and harvest index (r
2 = 0.873). Water use efficiency for grain ranged from 4.6–5.3 kg ha−1 mm−1 (NI) to 9.6–10.8 kg ha−1 mm−1 (FI) as a function of cultivar and irrigation, cv. Vitron and cv. Waha (full irrigation) and cv. Waha (rainfed) being the
most efficient cultivars. According to the evaporation pan method, the seasonal crop coefficient (K
c) values for the three cultivars were 0.64 (V), 0.62 (W) and 0.54 (C). The corresponding peak K
c values were 1.0, 0.97 and 0.89, respectively. K
c was closely related to leaf area index (LAI) and specific logarithmic relationships were calculated for each cultivar. Irrigation
scheduling should be adapted to the type of cultivar in relation to its potential yield and LAI development pattern. 相似文献
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Ahmad Bybordi Saaed Saadat Parisa Zargaripour 《Archives of Agronomy and Soil Science》2018,64(4):520-530
Considering the importance of onion and its cultivation in saline soils, a two-year experiment was carried out to investigate the effects of soil applied zeolite and foliar application of selenium (Se) and silicon (Si) on onion yield, qualitative traits and physiological attributes, under salinity stress. An experiment was performed at three-way factorial design with three replications as follows: zeolite at three levels (0, 4 and 8 ton ha-1), Se at three levels (0, 0.5 and 1 kg ha-1) and Si at three levels (0, 200 and 400 kg ha-1). The results indicated that the effect of year was significant on all studied traits except for soluble solids, bulb nitrogen, leaf sodium and potassium, chlorophyll content and peroxidase activity. Number of small-sized bulbs decreased with increasing zeolite, Se and Si application. Dry matter, soluble solids, nitrogen content, nitrate concentration as well as protein content significantly increased due to zeolite, Se and Si application. Leaf sodium content and enzyme activity decreased due to zeolite, Se and Si application. Overall, 8 ton ha-1 zeolite along with 1 kg ha-1 Se and 400 kg ha-1 Si caused the maximum onion yield and qualitative and physiologic traits including soluble solids, potassium, protein, chlorophyll and photosynthesis . 相似文献
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