Effects of Soil Moisture Stress on Two Varieties of Upland Cotton in Israel. III. The Bet-She'an Valley

Abstract

SUMMARYThe effects of moisture stress during various stages of the development of two varieties of upland cotton (Acala 4–42 and Deltapine Smoothleaf) were studied in two irrigation experiments in the Bet-She'an valley, where summer temperatures were high and evapotranspiration in the fully irrigated treatments was up to 8–10 mm./day in July and August. Optimum time for first irrigation in the Bet-She'an valley was two or three weeks before flowering and six or seven irrigations, if timed to prevent moisture stress, were sufficient to give high yields and good lint quality. Lint yield ranged from 270 kg./ha. in non-irrigated to 2000 kg./ha. in the fully irrigated treatments in 1966.

Physiological Parameters, Harvest Index and Yield of Deficient Irrigated Cotton

“…Withholding irrigation for 2 weeks resulted in a higher percentage of short fibers and a lower micronaire. Similar results were obtained with sprinkle irrigation under various soil water regimes (Amir and Bielorai 1969;Marani and Amirav 1971). Fiber elongation and strength are slightly influenced by water status while fiber length and micronaire are decreased by severe water stress (Grimes and Kirby 1992).…”

Unraveling the complexities of drought stress in cotton: a multifaceted analysis of selection criteria and breeding approaches

“…Under deficit irrigation regimes, Mert (2005) reported that water stress positively affected fiber fineness in his study, while Basal et al (2009) and Price (2009) reported that water stress negatively affected fiber fineness in their related studies, similar to our study. According to most of the previous studies, fiber length shortens with increasing water stress levels ( Marani, 1973 ; McWilliams, 2003 ; Pettigrew, 2004 ; Mert, 2005 ; Basal et al, 2009 ; Price, 2009 ; Rai, 2011 ; Hussein, Janat & Yakoub, 2011 ; Karademir, Karademir & Gençer, 2011 ; Cave, 2013 ). Fiber length is the fiber quality trait that is most affected by water stress.…”

“…According to Marani &Amirav (1971) , Marani (1973) , Mert (2005) and Başal et al (2009), boll weight decreases when cotton is exposed to water deficit conditions. However, Pettigrew (2004) found that water stress did not have a significant effect on the weight of an individual boll.…”

Bazı Pamuk Genotiplerinde Lif Kalite Özelikleri Bakımından Fenotipik Analizi

“…Çiçeklenme döneminde su kıtlığının oluşması lif uzunluğunu değiştirmemiştir. Ancak, kuraklık çiçeklenme döneminden sonra meydana geldiğinde, lif uzunluğunda azalma gözlenmiştir [10,21,22].…”